Abstract In this study, the ethylene/methyl acrylate/glycidyl methacrylate (EGA) terpolymer was performed to improve the stereocomplexation and toughness of poly(L-lactic acid)/poly(D-lactic acid) (PLLA/PDLA). The effects of EGA presence on the competing formations and crystallization kinetics of homocrystallites (HCs) and stereocomplexes (SCs), phase morphology and mechanical properties of PLLA/PDLA

Abstract The loss and overuse of avermectin (AVM) on protecting plants pose a threat to ecosystems. To increase the efficacy of AVM, fluorinated sodium carboxymethyl cellulose (CMC-g-PHFBA) was synthesized by inducing poly 2, 2, 3, 4, 4, 4-hexafluorobutyl methacrylate (HFBA), and AVM was then enveloped in CMC-g-PHFBA (AVM@CMC-g-PHFBA) via hydrophobic interaction. According to the results, the samples

Abstract Polyhedral oligomeric silsesquioxane (POSS) is an inorganic-organic nanostructure. POSS nanocage possesses silica core and organic functionalities at corners. POSS has been familiarized with various thermoplastic and thermosetting polymeric matrices. Polyurethane is an imperative polymer used with POSS nanofiller through physical mixing or chemical interaction methods. Inclusion of POSS may

Abstract The preparation of the fluorescent diblock copolymer was carried out between poly(tetrahydrofuran) (PTHF) and poly(ε-caprolactone) (PCL) via bulk and ring-opening polymerization (ROP) method by using two different dyes such as fluorescent methyl red (MR) and eosin b (EB) as lone chemical initiators at 160 °C under N2 atmosphere for two hours. All the prepared homopolymer and diblock copolymer

(2021). Editorial – A message from the editorial team. Journal of Macromolecular Science, Part A: Vol. 58, No. 1, pp. 1-1.

Abstract In this article, we reported a new strategy to synthesize of isosorbide-based copolycarbonates with good flexibility and tunable thermal property via one-pot direct melt polycondensation of isosorbide (ISB), dimethyl carbonate (DMC) and 1,4-benzenedimethanol (BDM). The effect of different feed ratio on the chemical structure, molecular weight, thermal and mechanical property of copolycarbonates

Abstract pH-responsive drug delivery systems that are bearing with acid-sensitive linkages between therapeutic molecules and polymers have been extensively explored in cancer treatment. But there is no systematic study to choose the best acid-sensitive linker in literature. In this report, three polymer-drug conjugates were synthesized with different pH-sensitive linkers such as ester, amide, and hydrazone

Abstract Good resistance to the solvent and excellent adhesion to many substrates are the significant features of polysulfide polymers. They are known to have extensive applications as sealants, adhesives and coatings. In this research, a series of polysulfide polymers of linear organic monomer (ethylene dichloride) and sodium-based aqueous monomers are synthesized using interfacial polymerization

Abstract Thermo-responsive fluorescent materials are promising candidates for the development of fluorescent thermometers, biological sensors and biomedicine. Since the interesting phenomenon of aggregation-induced emission (AIE) was first defined by Tang in 2001, it has provided a wonderful platform for development of efficient luminescent materials. Over the past decade, luminophors with AIE characteristics

Abstract In this paper, we prepared a novel molecularly imprinted photonic crystal hydrogels sensor (MIPCH) for sensitive and specific recognition of 2-Chlorophenol (2-CP). We can obtained the 2-CP MIPCH sensor with inverse opal stucture by useing 3 D SiO2 photonic crystal as template, 2-CP as imprinted molecules, methanol as solvent, methacrylic acid (MAA) as functional monomers, ethylene glycol dimethyl

Abstract The application of vegetable oil based additive for lubricating oil has attracted considerable interest due to their biocompatibility and multifunctional performances compared to conventional additives. In the present work, we have synthesized homopolymer of castor oil and copolymer of castor oil with styrene by thermal method without any solvent at different percentage composition by using

Abstract Hexamethylene diisocyanate (HMDI) reacts with 4-bromo-1H-pyrazole as a blocking agent to form blocked adducts of isocyanates. The adducts were characterized by FTIR, NMR, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). In the FTIR spectra, disappearance of a peak at 2250–2270 cm−1 is the indication of blocking of diisocyanate molecule with 4-bromo-1H-pyrazole

Abstract Many researchers have studied the effects of donors, promoters and alkyl aluminum compounds on the polymerization catalysts, the polymerization process and the final properties of polymers. Nevertheless, changing the operating parameters (such as temperature, duration and order of steps) during the catalyst synthesis process is an industrially popular solution to the challenge of modifying

Abstract In our previous research, origami graphene aerogel and halloysite aerogel were successfully prepared, and interesting results were also found in terms of structural self-reinforcement and stress to transfer behavior. As an aerogel, it is always the result of mechanical strength. Based on the previous research, we proposed the idea of ​preparing organic-inorganic hybrid aerogels using graphene

Abstract In recent times, research at the interface of polymer chemistry and biology has been going through a tremendous progress. A lot of interesting works have focused toward synthesis of tailored polymers either by generating a macromolecule with a certain composition through specific choice of comonomers, and/or by developing specific architectures using advanced polymerization techniques. Such

Abstract The surface treatment of basalt and carbon fiber was carried out by sulfuric acid etching and coupling. Combined fiber was prepared by melt mixing. Polarizing optical microscope (POM) and differential scanning calorimetry (DSC) were employed to investigate the effect of combined fiber on crystallization behavior. To be specific, POM indicated that the addition of combined fiber reduced the

Abstract Water-dispersed self-doped sulfonated polyaniline (SPANi) and self-doped carboxylated polyaniline (CPANi) were prepared by the copolymerization of aniline with m-aminobenzenesulfonic acid and m-aminobenzoic acid, respectively, and were identified by UV-vis spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy

Abstract A series of polysaccharide-graft-polyacrylamide copolymers were prepared via conventional free radical polymerization process, where polysaccharide served as macro-initiators in water-in-oil inverse emulsion polymerization media. The formed polysaccharide-graft-polyacrylamide copolymers were evaluated as friction reducers for slickwater fracturing in fresh water and synthetic seawater. Compared

Abstract The effect of the hydrophobicity of block copolymer macro-RAFT agents on the controllability of RAFT surfactant-free cationic emulsion polymerization of styrene was investigated. Three different copolymers, poly(dimethyl aminoethyl acrylate) (PDMAEA), poly(dimethyl aminoethyl acrylate-co-styrene)-b-(butyl acrylate) (P(DMAEA-co-St)-b-PBA) and poly(dimethyl aminoethyl acrylate-co-styrene)-b-(hexafluorobutyl

Abstract Double hydrophilic ABA-type amphiphilic polyurethane (PU)-based poly(N-vinylpyrrolidone) (PNVP)-b-PU-b-PNVP and poly(N-isopropylacrylamide) (PNIPAM)-b-PU-b-PNIPAM triblock copolymers have successfully been synthesized via the combination of the step-growth polymerization, reversible addition-fragmentation chain transfer (RAFT) polymerization and azide-alkyne click reaction. All polymers are

Abstract Shape memory polymers are unique materials having the ability to recover original shape in response to the external stimuli (heat, light, electric/magnetic field, pH, etc.). Shape memory nanocomposites have broadened the scope of shape memory polymers. Polystyrene (PS) is a synthetic aromatic thermoplastic polymer employed in shape memory nanocomposites. This feature article presents an up-to-date

Abstract Magnetic resonance imaging (MRI) is a promising technique widely used in clinical diagnose. Poly(α-amino acid)s are excellent carriers for MRI due to their excellent biocompatibility. PDOPA-b-PSar copolymers (defined as “DoS”) are synthesized by sequential polymerizations of 3,4-dihydroxy-L-phenylalanine N-thiocarboxyanhydride (DOPA-NTA) and sarcosine N-thiocarboxyanhydride (Sar-NTA) initiated

Abstract In order to use nitrogen atoms in polymers as the active adsorption sites for heavy metal ions, an effort has been made to couple polyethyleneimine, a water soluble polymer with polypyrrole, a conjugated polymer for nickel ion adsorption from aqueous solution due to a large number of nitrogen atoms available in the prepared water insoluble polypyrrole-polyethyleneimine (PPy-PEI) polymer nanocomposite

Abstract Synthetic polyesters have created a considerable attraction among the researchers over a few decades. Among them, polycaprolactone (PCL) is of great interest since the 1970s-1980s in various scientific and industrial fields. This particular aliphatic polyester is unique by its biocompatibility, biodegradability, physicochemical and mechanical properties. It can be synthesized through polycondensation

Abstract Itaconic acid (IA) is a bio-based unsaturated monomer, which has been limitedly used in free-radical polymerization due to low reactivity of its carbon-carbon double bond and lack of tendency toward homo-polymerization. In the present work, IA was modified with glyceryl methacrylate (GMA) or epichlorohydrin (ECH) to synthesize two new IA-based materials, i.e., IA-GMA and IA-ECH, respectively

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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

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