Hydrogenated bisphenol-A polycarbonate (PHBPA) was successfully synthesized from dimethyl carbonate (DMC) and hydrogenated bisphenol-A (HBPA) by the method of two-step polycondensation. The chemical structure and the molecular weight of PHBPA was identified by 1H-NMR spectra and gel permeation chromatography (GPC), respectively. In order to analyze the thermal degradation mechanism of PHBPA, a non-isothermal

In this study, a polybenzoxazine, (PPab) based on phenol and 4-aminomethyl benzoate and its composites containing various amounts of 3-hydroxyphenylboronic acid, (HB) were prepared by stepwise curing. It has been found that thermal properties of composites were improved as the amount of HB introduced was increased. The improvements in thermal characteristics were associated with condensation reactions

Polystyrene is a thermoplastic that is widely used in industry to manufacture of various materials. In this work, the objective was to investigate the effect of the Crystal Violet (CV) dye on polystyrene films under visible light. The films were produced by the casting method. Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and viscosimetry were used to monitor the

A few novel metal-polymer (polyurethane-iron (PU-Fe)) nanocomposites were fabricated. First, the polyurethane (PU) polymer is synthesized from the ethylene glycol and iso-phorone di-isocyanate (as monomers) keeping the NCO/OH ratio at 1.2. The metal-polymer nanocomposites(PU/Fe) with 30 wt% of high-purity filler (Fe) powder of nano size were added during the polymerization process of PU in the reaction

Epoxidation of soybean oil (ESBO) was carried out using Amberlyst 15 catalyst followed by ring opening using bio-based oleic acid to yield polyester polyol (ESOAP). Polyurethane (PU) coating was prepared by utilizing synthesized polyester polyol with hexamethylene diisocyanate (HDI) in the presence of dipentene as a green solvent. To meet industrial standards, biobased polyurethane coatings (Bio-PU)

Cellulose nanofiber (CNF) is the most effective reinforcement fiber for enhancing the physical properties of water-soluble polymers. Here, effect of CNF on the Young’s modulus of a polyvinyl alcohol (PVA) hydrogel produced through the freeze/thaw method is examined. PVA/CNF composite gels with different contents of CNF and PVA were produced without significant aggregation of CNFs during the freeze/thaw

The purpose of this work is to assess the circumferential mechanical characteristics and the mechanical strength of industrial PVC pipes, especially under pressure loading. The investigation and the prediction of the resistance to deformation or failure of PVC pipes under internal pressure are essential to develop their potential application. To this end, two approaches are retained in this paper.

Epoxy resin is widely used in various industrial fields due to its good adhesion, corrosion resistance and the like, but its thermal conductivity is low and it is difficult to meet the heat dissipation requirements. In order to obtain epoxy composites with high thermal conductivity and excellent electrical insulation, an effective method for functionalizing boron nitride (BN) and multi-walled carbon

The Epoxy-based Ionic Liquid/carboxylated multi-walled carbon nanotubes/polybutylene terephthalate nanocomposites (EPIL/c-MWCNTs/PBT) were prepared through melt-blending method. Due to πcation-π interactions between EPIL and c-MWCNTs, and the reaction of a carboxyl group of PBT matrices with an epoxy group of EPIL, the c-MWCNTs displayed a homogeneous dispersion in the EPIL/c-MWCNTs/PBT, which could

In this paper we present the results of the recovery of Ni(II) ions in aqueous media using poly(acrylamide-co-itaconic acid) hydrogels. The copolymer was synthetized via free radical polymerization at 30 °C using the potassium persulfate and N,N,N′,N′-tetramethylethylenediamine redox pair. Several methodologies were studied and compared by varying the following parameters: temperature, pH of the media

Octenyl succinic anhydride (OSA) has been widely reported for modification of starches and bears an amphiphilic character and is permitted for food applications. The present study was conducted to impart an amphiphilic character to tamarind seed xyloglucan (TSX) by its conjugation to OSA with an objective to impart amphiphilicity. The conjugate gains an amphiphilic character when hydrophilic groups

A cost-effective and eco-friendly approach for extraction and clean-up of sinapic acid was developed via the use of molecularly imprinted polymers (MIPs). Acetonitrile/methanol (5:1) was used as the porogenic solvent system, sinapic acid as the template, methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linking agent were used to prepare MIPs via precipitation

The study was aimed to formulate an extended release matrix tablets of celecoxib and to investigate the influence of different types and concentration of polymers on release of drug. Six formulations namely F1 – F6 were manually designed using different proportions of polymers. The matrix tablets formulations (F1 – F5) were composed of using different polymers such as, hydroxypropyl methylcellulose

In the present study, the influence of electrospinning parameters on poly(lactic acid) (PLA) nanofiber production and antimicrobial attitude of drug blending were investigated. The PLA concentrations (5 to 12% wt/v) were determined with solvent ratio variations of a triple solvent system (chloroform (CHL), dimethylformamide (DMF) and tetrahydrofuran (THF)). Flow rates were varied from 0.5 to 1 mL/h

Isotactic polypropylene (PP) composites achieved high impact strength by melt mixing with complex titanate whiskers/multiwalled carbon nanotubes (MWCNTs). The complex fillers, obtained via coupling agent γ-aminopropyl triethoxysilane, triggered additional reinforcement with stiff backup of whiskers and strengthened interfacial adhesion generated from MWCNTs, forwarding positive synergy on the PP composites

The biodegradation is becoming one of the most imperative properties of plastic products nowadays to promote the sustainable development and the conservation of the environment. In this framework, the main objectives of this study are to prepare an environmental friendly high density polyethylene (HDPE) nanocomposite and investigate the effect of the incorporation of nanoparticles of calcium carbonate

Poly(vinyl alcohol) (PVA) is an attractive polymer for various applications based on membranes. To increase water resistance, PVA material has to be adequately crosslinked. However, crosslinking behavior on the whole PVA membrane generally leads to obviously increased brittleness and deteriorated transparency. In the present research, a kind of glutaraldehyde crosslinked PVA membrane with gradient

Hybrid silica-graphene oxide (SiO2@GO) nanocomposites were fabricated by sol-gel method using tetraethylorthosilicate (TEOS) as silica (SiO2) precursor. The prepared nanocomposites were characterized by various analytical techniques to prove that the SiO2 were completely incorporated on the GO surface. Then, the SiO2@GO nanocomposites were introduced into natural rubber (NR) matrix followed by conventional

New applications of electronic devices come with integrated functionalization, size diminishment, and ultralight weight. An alternative electricity source is also demanded for effective commercialization of devices. Direct Methanol Fuel Cells (DMFCs) have the potential to play a major role as energy generators for portable applications, thus they can be a choice for new generation electronic devices

Polyimides and their modified forms (e.g., poly(imide-siloxanes)) are an important class of unique polymers. Their typical two-step preparation includes the preparation of a solution of the polyimide precursor in an amidic solvent (e.g., N-methyl-2-pyrrolidone, N,N-dimethylacetamide). Currently, these solvents are classified as toxic, and there is a strong demand to limit their use. Therefore, this

In this study, newly designed perylene diimide based polymers P1 and P2 were synthesized and were used as hole transporting materials in place of the more common spiro-OMeTAD in perovskite solar cells. The co-polymers P1-P2 were synthesized by Suzuki and direct arylation polymerizations of 2,9-bis(7-bromo-9,9-dioctyl-9H-fluoren-2-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetrone

Poly(methyl methacrylate)-Fullerene (PMMA/C60) nanocomposites, with different concentrations of C60 molecules (0.025 wt.%, 0.05 wt.%, 0.075 wt.% and 0.1 wt.%), were synthesized and characterized by Magnetic Force Microscopy and UV-VIS spectroscopy. Characterization had two main objectives: to identify C60 molecules in the PMMA/C60 complex and to evaluate the order of PMMA and C60 molecules in it. Since

Five CTA’s xanthate-type were synthesized and characterized and used in the controlled polymerization of N-vinylcaprolactam (NVCL) via reversible addition-fragmentation chain transfer (RAFT) polymerization. The CTA’s are linear (bifunctional), with three arms (from cholic acid or trimethylolpropane tris[poly(propylene glycol), amine terminated] ether), with six arms (from DPERT) and nine arms (from

Novel donor–acceptor (D-A) conjugated polymers containing phenothiazine and diketopyrrolopyrrole derivatives were successfully synthesized via direct arylation polymerization using the palladium catalyst system. The C-N coupling reaction was performed for the synthesis of 4-(10H-phenothiazin-10-yl)-N,N-diphenylaniline (PDA) and 10-(pyren-1-yl)-10H-phenothiazine (PYP) as donor monomers. The D-A conjugated

The article reports a two-step synthesis of composite nanofibrous mats of polytetraflouroethylene/zinc oxide (PTFE-ZnO); first, emulsion electrospinning of precursor solution was performed to yield as-spun mats followed by heat treatment at 280 °C. The surface of pure PTFE nanofibrous mats was modified by varying the amount of ZnO loadings in the electrospinning solution from 10 to 20 wt.%. Physiochemical

A new diamine containing hydroxyl and bis-tert-butyl substituted triphenylpyridine units was synthesized and used in the synthesis of polyimides (PIs) via a one-step polymerization. The diamine and PIs were characterized by FTIR and 1H-NMR. The aggregated structure of PIs was amorphous by wide angle X-ray diffraction test and all of them exhibited excellent solubility in most organic solvents. The

As far as we know, to enhance the toughness of poly(L-lactide) (PLLA) without compromising its inherent biodegradability, melt blending PLLA with flexible biodegradable polymers is the most effective and universal method. However, most of research results show a slight improvement in impact toughness due to the amorphous PLLA matrix. In other words, effective impact toughness can be achieved only if

The present study focused on the effects of the addition of lithium salts such as LiI, LiBr and LiCl on the rheological properties of aqueous solutions containing 15 wt% poly(vinyl alcohol) (PVA). There was a plateau in the shear storage modulus in the low frequency region, demonstrating that such solutions have a network structure attributed to hydrogen bonding of the PVA. The value of the plateau

Aliphatic-sulfonated polyesters based on 2,5 FDCA, such as poly(ethylene 2,5-furandicarboxylate)-co-(ethylene sodiosulfonate succinate) or 2,5-PEF-co-PESs were prepared by a melt step-growth polymerization of 2,5-FDCA and Na-DMSS with ethylene glycol. These copolyesters were characterized by 1H-NMR, DSC and TGA. The degree of randomness determined by 1H-NMR is less than one, thus indicating that these

The effect of sunflower seed husk flour amount on the rheological, morphological and mechanical properties of acrylonitrile-butadiene-styrene (ABS) terpolymer was determined in current research. Sunflower seed husk flour was incorporated to pure ABS at various weight percentages (5, 10, 15 and 20 wt%). Tensile properties (strength, modulus and elongation at break), impact strength, flexural properties

In this investigation, we described a facile preparation of temperature/photo dual sensitive polymers (PGABs) by Ugi four-component polymerization (Ugi-4CP) at room temperature in “one-pot” method using glutaraldehyde, 4-amido-azobenzene, t-butyl isocyanide and carboxyl-end-capped polyethylene glycols (S-PEG) as monomers. PGABs were found to be reversibly sensitive to the temperature in salt solution

The objective of this work was to investigate the effect of Mackerel-derived hydroxyapatite (MHAp) and native montmorillonite (MMT) on the mechanical-physico properties of the polylactic acid (PLA) blends. Various amounts of MHAp (2 to 10 phr) and MMT (0 to 4 phr) were added into PLA matrix by using melt-blending method. The results of tensile test and X-ray diffraction analyses indicated that the

A novel blend flat-sheet ultrafiltration (UF) membrane was prepared by immersion precipitation phase inversion using polyacrylonitrile (PAN) and polysulfone (PSF) as membrane materials. The relationship between casting solution formula and separation performance of blend UF membranes was analyzed. Experimental results show that the different casting solution formula such as polymer concentration, blending

A new aromatic diamine bearing ether and pendant 9(10H)-anthrone groups, 10,10-bis[4-(4-aminophenoxy)phenyl]-9(10H)-anthrone was reacted with various aromatic dianhydrides to yield the corresponding cardo polyimides via the poly(amic acid) (PAA) precursors and thermal or chemical imidization. The PAAs were produced with moderate to high inherent viscosities of 0.91–1.53 dL/g. All the PAAs could be

Thermal management has developed into a severe issue with the evolution of electronics. The construction of effectively thermal conduction pathways in the matrix is crucial for highly thermal conductive composites. In this work, a unique thermal conductive channel in the epoxy matrix had been established with hybridizing hexagonal boron nitride (BN) sheets and aluminum nitride (AlN) particles through

The hypothesis that the incorporation of halloysite nanotubes (HNTs) into low-density polyethylene (LDPE)/thermoplastic starch (TPS) blends could lead to materials with mechanical and flow properties close to those of pure LDPE but with improved potential biodegradability, was investigated. A 50 wt.%/50 wt.% LDPE/TPS blend was prepared via extrusion and injection molding, by using different HNT contents

In this work, a kind of chiral helical polymer PDTDH of 9,9-dipropynylfluorene skeleton structure were prepared. The structure and chiral properties of the obtained polymer were characterized by Nuclear Magnetic Resonance (NMR) and Circular Dichroism (CD) Spectroscopy. These chiral PDTDH polymers were used to fabricate chiral sensors and to investigate the enantioselective recognition of D−/L- tartaric

Concrete retarders could efficiently extend the hydration time of cement and maintain the plasticity of concrete slurry. However, some inherent shortcomings, such as a short setting time and poor compatibility, severely limits their application. To solve these problems, in this work, a series of carboxyl-terminated hyperbranched polymers (CTHP) were controllably synthesized and their retarding effects

Poly(glycolic acid) (PGA) is an essential biopolymer due to its thermal and mechanical properties and biodegradability which provide utility for medical applications and renewable industry. For biomedical applications, production of PGA with high molecular weight is an essential factor to possess adequate mechanical stability. Primary pathways for PGA synthesis are ring-opening polymerization of glycolide

The investigation on bio-based polymer electrolytes (BBPEs) system based on alginate doped with a various composition of glycolic acid (GA) were carried out and prepared using solution casting technique. The BBPEs complexes were characterized by using fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC)

There is growing need for environmentally friendly plastics to tackle problems of waste disposal. This makes it important to explore options to make biodegradable materials for packaging and coating applications. In this study we have leveraged the inherent anti-bacterial, biodegradable properties of chitosan (CS) and anti-bacterial and UV-absorbing properties of Zinc Oxide (ZnO) to develop CS-ZnO

This review aims at providing an examination of the central polymeric systems that have been tested by the Solution Blow Spinning Technique (SBS). The SBS is an on-demand micro/nanofibrous material forming technique that uses simple instrumentation, thus making its research substantial. Although other studies had already presented the SBS parameters and their correlations with fiber morphology, it’s

A novel bio-flame retardant (PA-B) was prepared based on green materials--banana peel powder (BPP) and phytic acid (PA), then PA-B was used to prepare flame retardant poly(lactic acid) (PLA) composites. The flame retardancy and thermal property of PLA composites were studied. It can be found that the limiting oxygen index (LOI) of PLA composite with 15.0 wt% BPP is 22.1%, showing the heavy dripping

In the present work, flexible poly (vinylidene fluoride)/Diamond nanoparticles nanocomposite films with improved electroactive properties at low filler concentration were developed. The combination of nanofiller doping and mechanical stretching was employed to obtain the films with significantly improved electroactive phase at low nanodiamond (ND) concentration, making them the interesting materials

In this work, a new electrode active materials including reduced graphene oxide (rGO), Manganese dioxide (MnO2) / polyterthiophene (PTTh) has been synthesized as a nanocomposite using in-situ polymerization method, microwave-assisted method for obtaining reduced graphene oxide and chemical synthesis of metal-oxide for supercapacitor devices. A ternary nanocomposites of rGO/MnO2/PTTh were characterized

Water solution polymerization was adopted to prepare perrhenate ion imprinted polymers in this work, and preparation conditions, such as molar ratio of acrylic acid, N,N - methylene double acrylamide, hydrogen peroxide and ascorbic acid to N-vinyl pyrrolidone, polymerization time and temperature on adsorption separation property were investigated and optimized using adsorption quantities and separation

The synthesis of linear and branched hydrophobically water soluble (co) polymers composed of acrylamide (AM), lauryl acrylate (LA) and N,N′-methylenebis (acrylamide) was carefully carried out via a one-pot process using the reversible addition-fragmentation chain transfer (RAFT) polymerization in aqueous media. The polymerization reactions were triggered out by sequential addition of monomers in the

In this work, 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl) methylene]-nonitol (TBPMN) was conscripted as the clarifying agent, the influence of the injection pressure on optical properties of PP were investigated, and results documented that increasing the injection pressure could not improve the transparency of the transparent PP. Thereafter, the crystallization behavior and morphological changes

A series of polyethylene glycol (PEG) /methylcellulose (MC) composites with various PEG mass loading (10%-50 wt%) were prepared via physical blending method as a new type of form-stable composite phase change material (CPCM). The transimission, chemical compatibility, thermal and mechanical properties of form-stable PEG/MC CPCMs were characterized using polarized optic microscopy (POM), Fourier transform

In this study, we prepared nitrogen-doped microporous carbons (NMCs) from two different benzoxazine monomers (AMBZ, AEBZ), each containing both azobenzene and carboxylic groups, through a simple and environmentally friendly process of ring-opening polymerization (ROP), calcination, and KOH activation. We synthesized the AMBZ and AEBZ monomers through Mannich condensations of 4,4′-diaminodiphenylmethane

In this study, polydopamine (PDA) particles were embedded into polyethersulfone (PES) membrane through wet-phase separation. We considered two concentration of PES solution—17 and 19 wt%. Adding different concentration of PDA (0–0.7 wt%) into the two solutions revealed an opposite effect on the characteristic and performance of the membrane. Incorporating PDA particles in 17 wt% PES solution was resulted

In present study, 4-(3-(2,3,4-trimethoxyphenyl) acryloyl) phenyl acrylate (AC-TMC) monomer was synthesized from the reaction of trimethoxy-substituted hydroxy chalcone and acryloyl chloride in the presence of triethylamine. The polymerization of AC-TMC was carried out by the free radical polymerization method at 60 °C. Monomer and polymer structures were confirmed by FT-IR, 1H-NMR, 13C-NMR spectroscopy

Dithizone is known to be very effective for heavy metal ions retention and widely used as developer in detection methods. To explore a novel surface modified polymer microspheres, this paper prepared a novel modified polystyrene (PS-g-D) microspheres by grafting dithizone as the complexing agent and developer on the surface of PS microspheres. The structure of PS-g-D was analyzed by FT-IR, and the

Four triphenylpyridine diamines with different substituent structure were successfully synthesized and polymerized to obtained polyimides (PIs) via one-step. The diamines and PIs were characterized by FTIR and 1H-NMR spectra. The aggregated structure of PIs was amorphous by wide angle X-ray diffraction test. The structure of the substituent had an important influence on the properties of PI (such as

Hyaluronic acid (HA) and copolymeric HA:Sucrose (HA:Suc) particles were synthesis with two different crosslinkers (Xs), divinyl sulfone (DVS) and glycerol diglycidyl ether (GDE) in 0.5–20 μm size range. The sustenance potential of HA:Suc particles in bacterial growth media was examined with time, up to 72 h incubation time in the cultivation of various gram-negative (GN) and gram-positive (GP) bacterial

Novel Pentaerythritol (PTL)- and dipentaerythritol (DPTL)-cored dendrimer-like star polymers with AB2 miktoarms [A = poly(L-Lactide); poly(ethylene glycol)-folate] (1g and 2g) were synthesized and characterized by proton magnetic resonance spectroscopy, fourier transform infrared, gel permeation chromatography and differential scanning calorimetric techniques. Anticancer drug doxorubicin was encapsulated

The unsaturation in Rubber seed oil (RSO) was converted to polyhydroxy compound (HY-RSO) in a single step reaction using potassium permanganate solution under carefully controlled conditions. The HY-RSO polyol so formed was reacted with methylene diisocyanate (MDI) to synthesize polyurethane prepolymer (PU) containing terminal isocyanate groups. Moisture aided curing of the prepolymer led to crosslinked

Here, we demonstrate multifunctional activity of a polydimethyl siloxane (PDMS) nanocomposite sponge for microbial mitigation and oil contaminant removal from water. Different concentrations of silver (Ag) nanoparticles have been studied for their anti-microbial activity along with activated Carbon (AC). Further, AC and Ag nanoparticles were incorporated inside the PDMS sponge using a unique non-aqueous

Two hyper-cross-linked polymers (HCPs) were readily prepared through one-pot Friedel-Crafts reaction using methylene and carbonyl as the rigid cross-linking bridges. Unexpectedly, the methylene cross-linked PDV-pc-1 (686 m2/g and 0.37 cm3/g, respectively) owned a little higher Brunauer-Emmett-Teller surface area and pore volume than the carbonyl cross-linked PDV-pc-2 (635 m2/g and 0.33 cm3/g, respectively)

This investigation reports the analysis of different microstructures present in poly(methyl methacrylate) (PMMA) using1D and 2D NMR spectroscopy. The PMMA used in this study has been prepared via activators regenerated by electron transfer atom transfer radical polymerization (ARGET-ATRP) in DMF at ambient temperature using methyl 2-chloro propionate (MCP) as initiator, CuBr2 as catalyst in combination