Abstract There is an urgent requirement to develop excellent dye adsorbent, which contains high dye removal capacity with desirable separation property which are imperative to remove anionic and azo dyes from aqueous solutions. To address this issue, novel polymer composites were synthesized with varying reaction parameters, owing to the fact that various grades of graft polymer composites have been

Abstract The present work reports, two types of bio-based hyperbranched polyester polyols (HyBPs) were synthesized from castor oil-based polyols (monoglyceride and fatty amide) and 2,2-bis(hydroxymethyl) propionic acid. The structure of HyBPs was determined by FTIR and NMR. Graphene oxide was prepared from graphene powder by the Hummer’s method and characterized by XRD and FESEM. Further, the composites

Abstract Exfoliation and preparation of large interlayer spacing and reactive graphene oxide (GO) powder are of crucial importance and neck technologies for their applications in polymer composites. Herein, we reported an innovative approach to prepare a large interlayer spacing reactive NCO-GO powder by covalent functionalization of GO with 4,4’-diphenylmethane diisocyanate (MDI). The morphology,

Abstract Hyaluronic acid (HA) particles with divinyl sulfone (DVS) crosslinking at 10% mole ratio (HA macromolecule repeating units) were prepared and demonstrated as versatile drug carriers with sustainable and long-term release capabilities for cancer drugs, corticosteroid, and antibiotics. Two different methods were chosen in drug loading process; encapsulation for cancer drugs, 5-fluorouracil (5FU)

Abstract Cephalexin loaded electrospun nanofibers with core-shell structures were prepared from poly(vinyl alcohol) (PVA) blended with various biopolymers such as chitosan (CH), carboxymethyl cellulose (CMC), carboxymethyl starch (CMS), and hydroxyproyl cellulose (HPC) in PVA:biopolymer ratio of 90:10. The electrospun nanofiber mats were cross-linked by heat treatment to avoid disintegration in water

Abstract Highly crosslinked elastomer-iron oxide composite for grinding as well as for polishing application. With the recent introduction of organic acid-based coolants in polishing applications, the designed composites should have good resistance to oils. This investigation reports the preparation and properties of high crosslinked elastomer-iron oxide composites based on Chloroprene Rubber (CR)

Abstract Tannin-immobilized cellulose was prepared by the phenolic reaction of the phenol ring of tannin with the aldehyde group of aldocellulose, where aldocellulose was prepared by the oxidization of cellulose with sodium periodate as oxidizing agent. The method of immobilized tannin is environmentally friendly due to the lack of crosslinking agent. The adsorption properties of cellulose were improved

Abstract In the present study rubber/rubber blends [RRB] of natural rubber [NR] and butadiene rubber [BR] with 50phr of carbon black [CB] in different blend ratios (70:30, 50:50, and 30:70) were prepared on a two-roll mill. Cure properties, density, morphology, and mechanical strength of CB filled NR/BR blends were analyzed. It was observed that the addition of CB improved the processing properties

In this work, two polysulfide polymers were synthesized using aromatic organic monomer (α,α′-dichloro-p-xylene) and sodium disulfide (Na2S2) and sodium tetrasulfide (Na2S4) aqueous monomers. Then, the curing process of the polymers was carried out at 170° C using a rheometer. The structural characteristics of synthesized and cured samples were identified by Raman and Fourier transform infrared (FT-IR)

Based on the aromatic diamine monomer containing di-tert-butylbenzene and methyl groups, this work proposes its polymerization with four different dicarboxylic acids. The prepared polyamides (PA 3a–3d) were characterized by GPC, FTIR, 1H NMR, mechanical, thermal, optical and gas separated techniques. They exhibited high solubility and good optical transparency. Their optical transmittance at 450 nm

A novel drug-polysaccharide conjugate with konjac glucomannan (KGM) as a drug carrier was fabricated through the esterification of ibuprofen (IBU), an anti-inflammatory drug, with KGM. The influences of the reaction conditions, such as the amount of ibuprofen acryl chloride, reaction time, reaction temperature, and the amount of catalyst, on the degree of substitution were investigated. KGM ibuprofen

In this present study, different forms of quercetin encapsulated beads were synthesized, namely ionic cross-linked gel beads and cryogel beads. Fourier Transform Infrared (FT-IR) spectra of the beads were used to characterize and prove quercetin encapsulation in alginate beads. Swelling and drying profiles were studied. Besides, release kinetics of quercetin molecules from gel beads and cryogels were

Homopolymer of linseed oil and its four copolymers with styrene, 1-decene, isodecyl acrylate and octyl acrylate, respectively, have been synthesized in this present context. The prepared polymers are characterized by NMR and FTIR spectroscopy. The molecular weights have been measured by gel permeation chromatography. Their effectiveness as pour point depressant (PPD), viscosity index improver (VII)

Amphiphilic photo and redox dual-stimuli-cleavable β-cyclodextrin-ferrocene supramolecules were synthesized through noncovalent interactions of ferrocene (Fc) and β-cyclodextrin (β-CD) born by 5-hydroxy-2-nitrobenzyl alcohol (ONB), a photodegradable linker between the β-CD and poly(4-substituted-ɛ-caprolactone) (PXCL n ) chain. The terminal host–guest MPEG-Fc/β-CD-ONB-PXCL n complex can formed micelles

In this study, different water-soluble derivatives of chitosan were synthesized by treating chitosan with monochloroacetic acid to yield O-carboxymethyl chitosan (O-CMC) and this O-CMC treated with vanillin to form Schiff base. Metal complexes of this Schiff base were prepared with different salt of metal ions like Cu(II), Ni(II), Fe(II) and Zn(II). O-CMC and its Schiff base were characterized by FTIR

Firstly, polystyrene (PS)-grafted silica (SiO2) particles were prepared by means of “grafting from”, and then chloromethylated with 1,4-dichloromethoxybutane to obtain chloromethylstyrene (CMPS)-grafted particles CMPS/SiO2. Finally, salicylhydroxamic acid (SHA) was bonded to CMPS/SiO2 particles by nucleophilic substitution reaction, so as to prepare SHA-functionalized adsorption materials SHA-PS/SiO2

This work describes the preparation and characterization of different guar gum (GG) hydrogels at different sizes to be used for protein absorption. GG macrogels and micro/nanogels were synthesized through chemical crosslinking via bulk polymerization and reverse micelle microemulsion techniques, respectively, and high yields, for example, 94 ± 4% and 91 ± 6% were obtained. GG micro/nanogels with spherical

The synthesis of poly(vinyl chloride-g-methyl methacrylate) graft copolymer was carried out by use of a Cu catalyzed azide-alkyne cycloaddition reaction to graft terminally propargyl polymethyl methacrylate (PMMA-propargyl) to polyvinyl chloride azido (PVC-N3). For this purpose, PMMA-propargyl was obtained by reaction of methyl methacrylate and propargyl alcohol by redox polymerization. PVC-N3 was

Antifogging films are used in an increasing number of applications in greenhouse cultivation because fog formation affects transmission. Here, we summarize a way to improve the antifogging duration of linear low-density polyethylene (LLDPE) films by controlling the migration of the antifog agent. We prepared SiO2-grafted glycerin monostearate (SiO2-g-GMS) by covalently grafting surface modified SiO2

Polymerization of norbornene was carried using a (MC) and two dinuclear (DC1 and DC2) α–diimine Ni-based catalysts under controlled conditions. The structure of dinuclear catalysts had a difference on the ortho- and para position (2,4.6-trimethyl group for DC1 and 2, 6-isopropyl group for DC2). DC2 catalyst through synergistic effects exhibited higher productivity (1.3 × 106 g/mol Ni) in comparison

A series of silicone rubber foam (SF)/silicon dioxide (SiO2) nanocomposites were prepared by room temperature vulcanization. The effects of SiO2 content on the crosslinking density, cell structure, physical and mechanical properties, thermal properties, dynamic thermomechanical properties of SF/SiO2 nanocomposites were studied. The results indicated that SF/SiO26 nanocomposite with 6.0 wt% SiO2 content

A new class of degradable polymers—AABB-type polydepsipeptides (PDPs) composed of four building blocks—naturally occurring α-amino and α-hydroxy acids, fatty diol and dicarboxylic acid were synthesized for the first time. For the synthesis of novel PDPs, new diester diacids—O,O′-diacyl-bis-glycolic acids (DAGAs) were prepared by interaction of diacid chlorides with glycolic acid and then they were

The first example of the usefulness of titanium (IV) butoxide, as initiators for open air in-situ intercalative polymerization of ε-caprolactone (ε-CL) in the presence of organoclay is herein reported. The bionanocomposites based on poly(ε-caprolactone) (PCL) were prepared by in-situ Ring Opening Polymerization (ROP) of ε-caprolactone in the presence of different organomodified montmorillonite clay

In this study, we proposed to synthesize soluble poly(azomethine-ether)s derivatives containing aromatic rings and long alkyl groups. For this reason, long alkyl groups containing double bromide or chloride atoms were chosen to synthesize diamines monomers (DIAMs). Seven different poly(azomethine-ether)s were synthesized from the condensation reaction of DIAMs with 4,4′-[1,4-phenylenebis(methyleneoxy)]dibenzaldehyde

The recyclability and reuse of materials are essential for satisfying the current demand for polymers while alleviating the impact on the environment. Herein, a series of self-repairing polymeric materials were synthesized by exploiting the reversibility of the Diels-Alder (DA) reaction. The main polymer chains were composed of polyethylene glycol diglycidyl ether (PEGDGE) and polypropylene glycol

A new aromatic diiodide monomer, bis(4-(3-iodophenoxy)phenyl)phenylphosphine oxide (BIPPO), was prepared by condensation of bis(4-fluorophenyl)phenylphosphine oxide with 3-iodophenol. A series of poly(arylene ether amide triphenylphosphine oxide)s were synthesized via heterogeneous palladium-catalyzed carbonylative polycondensation of BIPPO, aromatic diamines, and carbon monoxide. Polymerization reaction

The unique properties of gels, particularly polymer based gels have drawn attention of the researchers since ages. This review highlights the fundamental aspects of polymeric gels, enumerating them in terms of differences in synthesis or crosslinking mechanism. To broaden the possibility of these polymeric gels to decontaminate textile effluents comprising of toxic dyes, the scope of commonly used

In this study, a series of UV-curable waterborne polyurethane (UV-WPU) emulsions with different contents of dipentaerythritol hexaacrylate (DPHA)/dipropylene glycol diacrylate (DPGDA) were prepared using isophorone diisocyanate, and poly(tetramethylene glycol) as the main materials. Besides, DPHA/DPGDA with a mass ratio of 1:1 was used as the reactive diluent and UV curing agent, and pentaerythritol

A new class of degradable polymers—AABB-type polydepsipeptides (PDPs) composed of four building blocks—naturally occurring α-amino and α-hydroxy acids, fatty diol and dicarboxylic acid were synthesized for the first time. For the synthesis of novel PDPs, new diester diacids—O,O′-diacyl-bis-glycolic acids (DAGAs) were prepared by interaction of diacid chlorides with glycolic acid and then they were

Reversible-deactivation radical polymerizations (RDRP) of acrylamide (AM) was carried out via dispersion polymerization mediated by cobalt complexes in alcohol/water and initiated by azobisisobutyronitrile (AIBN) at 65 °C. Well-defined polyacrylamide (PAM) uniform spherical particles with predetermined molecular weight and relatively narrow dispersity (Đ = 1.24–1.53) were obtained under mild thermal

Single-responsive hydrogels will be limited in application. Therefore, the development of hydrogels with multi-stimulus response characteristics will greatly broaden its application, such as smart appliances and dye adsorption aspects. In this study, we designed a simple two-step radical polymerization method to fabricate a Poly(N-isopropylacrylanide)(PNIPAM)- graphene oxide (GO)/Polyaniline (PANI)

Copolymerization of ethylene and 1-octene was carried out using a Ziegler-Natta catalyst and the optimization of copolymerization conditions was studied. The optimum polymerization activity was obtained at 60 °C and [Al]:[Ti] molar ratio of 143:1. It was observed that the increase in the comonomer ratio in the feedstock influenced the physical properties of the final copolymer obtained. The results

In this work, the Pickering emulsion polymerization of styrene (STY) with silica nanoparticles as stabilizers and ammonium persulfate (APS) as initiator, was studied. The effects of several co-aids, considered as modifying agents to vary the compatibility of colloidal silica (Ludox AM) between the polymer interface during the emulsion polymerization, are evaluated. Sodium vinyl benzene sulfonate, 4-vinyl

We have explored the sulfonic-functionalized graphene oxides (S-GOs) as an efficient conductive reinforcement to enhance the dielectric permittivity and electromagnetic interference (EMI) shielding effectiveness of the polyethersulfone (PES). The S-GOs having numerous terminal -SO3− groups not only promote the homogeneous dispersion for achieving the low percolation threshold, but also induce strong

Reversible-deactivation radical polymerizations (RDRP) of acrylamide (AM) was carried out via dispersion polymerization mediated by cobalt complexes in alcohol/water and initiated by azobisisobutyronitrile (AIBN) at 65 °C. Well-defined polyacrylamide (PAM) uniform spherical particles with predetermined molecular weight and relatively narrow dispersity (Đ = 1.24–1.53) were obtained under mild thermal

This work illustrates a new molecular design for preparing amphiphilic ethylene glycol-rich poly(ß-hydroxyl amine) polymers. In this design, the backbone and the termini of the side-chain represents hydrophilic parts of the polymer chain. Incorporation of a short hydrophobic alkyl segment between the hydrophilic parts endows an amphiphilic character to the material. Due to this amphiphilic nature,

The anticorrosive performance of epoxy-indole-modified alumina nanocomposite-coated mild steel was investigated by electrochemical impedance spectroscopy (EIS), scanning electrochemical microscopy (SECM) and pull-off adhesion method in natural seawater. The dispersibility of nano-alumina in the epoxy resin has been enhanced by the functionalization of nano-alumina by indole moiety. The resulting nanocomposite

Chitosan was synthesized from chitin; extracted from prawn shells’ powder via deacetylation and physicochemical properties were studied. Novel chitosan derivatives of 2-imidazolecarboxaldehyde and 2-thiophenecarboxaldehyde were synthesized by refluxing equimolar quantities of respective aldehyde with chitosan. These functionalized chitosan derivatives were characterized by Fourier transform infrared

We prepared CdSe QDs on thioglycolic acid modified chitosan (CdSe@Chit-TGAc). It showed bright yellow fluorescence under long wave UV radiation. Optical properties and growth of crystal was checked by ultraviolet-visible spectroscopy and photoluminescence spectroscopy. HRTEM and XPS results demonstrated that CdSe QDs were successfully prepared and decorated on thiol modified chitosan templet and size

Enhancing the anti-fouling and tracking resistance of silicone rubber is important to expand its application in outdoor high voltage insulation field. In this work, fluorosilicone resin (FSR) was synthesized by the sol-gel reaction of perfluorooctyltriethoxysilane and ethyl silicate. The effect of FSR on the tracking resistance of addition-cure liquid silicone rubber (ALSR) was investigated by inclined-plane

10,10-Bis[4-(4-aminophenoxy)-3-methylphenyl]-9(10H)-anthrone, as a novel aromatic diamine, was synthesized from anthrone by three-step process. A series of polyimides containing methyl substituents and 9(10H)-anthrone pendant groups was prepared from this diamine with various aromatic dianhydrides via the poly(amic acid) (PAA) precursors and subsequent thermal or chemical imidization procedure. Inherent

The study aimed to synthesize dexibuprofen (DXIBN) solid dispersions (SDS)-loaded hydroxypropylmethylcellulose (HPMC) and co-acrylic acid (AA)-based oral hydrogels via a modest solvent evaporation technique. Free radical polymerization technique was used to prepare HPMC-co-AA hydrogels using EGDMA as cross-linker and ammonium per sulfate as initiator. SDS of DXIBN were prepared using Soluplus® (SLPS®)

Enhancing the anti-fouling and tracking resistance of silicone rubber is important to expand its application in outdoor high voltage insulation field. In this work, fluorosilicone resin (FSR) was synthesized by the sol-gel reaction of perfluorooctyltriethoxysilane and ethyl silicate. The effect of FSR on the tracking resistance of addition-cure liquid silicone rubber (ALSR) was investigated by inclined-plane

The study aimed to synthesize dexibuprofen (DXIBN) solid dispersions (SDS)-loaded hydroxypropylmethylcellulose (HPMC) and co-acrylic acid (AA)-based oral hydrogels via a modest solvent evaporation technique. Free radical polymerization technique was used to prepare HPMC-co-AA hydrogels using EGDMA as cross-linker and ammonium per sulfate as initiator. SDS of DXIBN were prepared using Soluplus® (SLPS®)

In the present study, chitosan functionalized mesoporous silica nanoparticles have been synthesized. Chitosan derived from an edible mushroom, Agaricus bisporus was used during synthesis of chitosan functionalized silica nanoparticles. The functionalized silica nanoparticles were subjected to fluoride sorption using a batch method which subsequently showed removal efficiency of 95% with maximum sorption

In the present study, chitosan functionalized mesoporous silica nanoparticles have been synthesized. Chitosan derived from an edible mushroom, Agaricus bisporus was used during synthesis of chitosan functionalized silica nanoparticles. The functionalized silica nanoparticles were subjected to fluoride sorption using a batch method which subsequently showed removal efficiency of 95% with maximum sorption

A series of chiral alternating copolymers based on glycyl-glycine attached styrenic monomer (VG) and alanyl-alanine tethered maleimide (MA) are synthesized through reversible addition-fragmentation chain transfer (RAFT) polymerization. The alternating sequential arrangement of the two monomers along the synthetic copolymer chain is systematically established through 1H and 13C NMR spectroscopic investigation

The effect of Closite C93A nanoclay on the mechanical, thermal properties of diglycidyl ether bisphenol A (DGEBA) epoxy resin and epoxidized soybean oil (ESO) bioepoxy blend at various wt.% (10, 20, 30) cured with anhydride hardener (MHHPA) existence of 2-methylimidazole (2-MI) as an accelerator was investigated. The DGEBA/ESO blend systems optimized through the mechanical properties. The 20 wt.% DGEBA/ESO

EPEG (ethylene-glycol monovinyl polyethylene glycol)-AA (acrylic acid) copolymerization is a typical representative of free radical copolymerization for the preparation of PCs that has been discussed and used increasingly in recent years. The calculation of the reactivity ratio can be used for the analysis of the monomers reactivity, which is of great significance to the study of copolymerization process

Poloxamer (Pluronic®) and poloxamine (Tetronic®) are commercially important block copolymers composed of polypropylene oxide (PPO) and polyethylene glycol (PEG) segments. Due to the difference in chemical polarity of the two blocks, the copolymers exhibit amphiphilicity and thermally induced aggregation behavior in aqueous solutions. The present work shows that block copolymer architecture is not necessary

To clarify the structure formation in pH-sensitive cellulose based micro porous membrane in non-solvent-induced phase separation process, first, a series of ethyl cellulose-graft-poly(2-(diethylamino)) ethyl methacrylate) (EC-g-PDEAEMA) with different graft density and graft length were synthesized via atom transfer radical polymerization (ATRP). The results of the micelles characterized by UV, Laser

In this study, octadecyl amine modified graphene oxide nanoparticles were used as a potential nucleating agent in the foaming process of the polymer, to increase its functions, especially for tissue engineering purposes. It has been established that the nucleation in the polymer depends on four factors of the nanoparticle weight percentage, foaming temperature, saturation pressure and the foaming time;

A multiple amides-based linear organic compound (TMC-300) was synthesized and as an efficient nucleator was incorporated into PHBH to fabricate PHBH/TMC-300 composite to investigate effect of TMC-300 on crystallization behavior of PHBH in-depth. Nucleation capacity of TMC-300 on the PHBH is significantly higher than those of two conventional inorganic nucleators. TMC-300 exhibits dual effects on crystallization

Glycolysis, which is one of the most promising chemical recycling routes for waste poly(ethylene terephthalate) (PET), has been drawing increased industrial interests in recent years. In this paper, glycolysis of waste PET fiber was carried out under nitrogen atmospheric condition with excess ethylene glycol (EG) as glycolysis agent and zinc acetate (Zn(Ac)2) as catalyst. Parameters such as reaction

Poly[Ɛ-CL-b-(MMA-comb-EMA)]comb-type polymers were synthesized by ATRP and Ɛ-caprolactone macroinitiator and macromonomer. Methyl methacrylate macromonomer was synthesized from acylation reaction of methacryloyl chloride with PMMA ended 7-hydroxy coumarin. The macroinitiator was prepared from the reaction of chlorine acetyl chloride P(Ɛ-CL). The synthesized polymers were characterized by FT-IR, 1H-NMR

This research article describes the impact of the depressurization rate change on the morphology of microcellular polycarbonate foams (PCMFs) using batch-wise foaming with carbon dioxide as a physical blowing agent. It was expected that the depressurization rate will affect the foaming behavior of microcellular foamed polycarbonate (PCMFs). While keeping other variables constant and changing depressurization

The hydrodynamic properties of uncharged polymers of acrylamide has been investigated in 1,4-dioxane (DO) + water mixed solvent media at 303 K, 313 K and 323 K temperatures as probed by viscometry to explore the dimension and conformation of individual polymer molecules. In this study three different average molar masses of PAM, e.g., 8.9 × 106 (designated as Type-A), 1.6 × 106 (designated as Type-B)

The method of biocidal plastics preparation has been described. The two types of N-halamine additives have been mixed (0.5–2 wt%) with plasticized PVC and processed by dry-blend extrusion and injection molding. The biocidal efficacy of modified PVC has been tested against two strains of bacteria: Escherichia coli and Staphylococcus aureus; and against yeast—Candida albicans. It was found that even

To meet the harsh water plugging conditions for a crack fracture-type rock reservoir of Tahe oilfield in China, which are high temperature, high salinity and above 4000 m underground, a novel delay-expansion water-swelling rubber/OMMT (DWSR) with silty-resistant and lower hydrophilic resin migration behavior was developed. HNBR, semi-HEMA@PU, polyacrylamide (PAM), OMMT and other rubber additives were

Organic contaminants have a destructive influence on the environment. Dye is a kind of serious organic pollutant. The aim of this project was to explore the adsorption of methylene blue (MB) to purify wastewater. Cross-linked polyacrylamide (CPAM) microspheres were acted as the base material, ammonium persulfate (Aps) as the initiator, sodium styrene sulfonate (SSS) as anionic functional monomer,