353 Result(s)
within
English
Chemistry
Characterization and Evaluation of Materials
Industrial Chemistry/Chemical Engineering
Polymer Sciences
Yu** Zhou
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Article
Atom-Transfer Radical Polymerization to Synthesize Novel Liquid Crystalline Diblock Copolymers with Polystyrene and Mesogen-jacketed Liquid Crystal Polymer Segments
The synthesis of a series of new rod-coil diblock copolymers with different molecular weights and low polydispersity was achieved by atom transfer radical polymerization. The block architecture (coil-conformat...
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Article
Three-Dimensional Simulation of the Non-Isothermal Cast Film Process of Polymer Melts
A modeling system is proposed to simulate the non-isothermal three-dimensional cast film process of viscous polymer melts. The finite element method (FEM) is used to solve the system and the numerical results ...
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Article
Effect of fluoropolymer antidrip** agent on the microstructure and properties of polyesters
Poly(ethylene terephthalate) (PET) is of excellent mechanical properties and melt processability and is widely used as raw material for textile fibers. However, the flame retardant properties of PET were rathe...
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Article
Melt grafting of vinyltrimethoxysilane and water crosslinking of polypropylene/ethylene-propylene diene terpolymer blends
The melt grafting of vinyltrimethoxysilane (VTMS) onto polypropylene (PP)/ethylene-propylene diene terpolymer (EPDM) blends was studied. The effect of VTMS, EPDM and initiator concentrations on mechanical prop...
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Article
Self-assembly of the polysiloxane modified with cationic and perfluorocarbon groups on the polyester surface and its effect on the color shade of the dyed polyester
The polysiloxane modified with cationic and perfluorocarbon groups could form film on the polyester surface by macromolecular self-assembly process. The thin film on the polyester surface could affect the colo...
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Article
Kinetics of thermo-oxidative degradation of zinc borate/microcapsulated red phosphorus with magnesium hydroxide in flame retarded polypropylene composites
The flammability and the thermo-oxidative degradation kinetics of zinc borate (ZB) and microcapsulated red phosphorus (MRP) with magnesium hydroxide (MH) in flame-retardant polypropylene (PP) composites were s...
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Article
Partial melting and recrystallization of isotactic polypropylene
A relatively high predetermined crystallization temperature (135°C) was chosen to grow well developed iPP spherulites, then the partial melting was carried out at a temperature of 165°C, where the preformed spher...
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Article
Adsorption studies of tannic acid by commercial ester resin XAD-7
Tannic acid and its related compounds are known as refractory organic pollutants, and it can create serious problems for the environment. The adsorption and desorption studies of tannic acid on commercial resi...
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Article
Adsorption of humic substances by macro weakly basic ion-exchange resin and their effects on removal of Cu2+ and Pb2+
Adsorption of humic, tannic and gallic acids by a macro weakly basic ion-exchange resin JN-01 was studied. The adsorption capacity of this resin for gallic and tannic acids is much higher than that for humic a...
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Article
Effects of chain microstructure of butadiene-isoprene copolymers on their glass transition and crystallization
A series of butadiene-isoprene copolymers (BIR) with various compositions were synthesized with a neodymium-based catalyst system. The microstructure, composition and sequence of copolymers were characterized ...
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Article
Effect of surface modification of montmorillonite on the properties of rigid polyurethane foam composites
This study investigated the influence of various organically modified montmorillonites (organoclays) on the structure and properties of rigid polyurethane foam (RPUF) nanocomposites. The organoclays were modif...
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Article
Crystallization, mechanical and thermal properties of sorbitol derivatives nucleated polypropylene/calcium carbonate composites
The effect of α phase nucleating agent (NA) 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol (DMDBS) on crystallization and physical properties of polypropylene/calcium carbonate (PP/CaCO3) composites has been compa...
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Article
Synthesis of heteroarm star polymers comprising poly(4-methylphenyl vinyl sulfoxide) segment by living anionic polymerization
A series of 3-arm ABC and AA′B and 4-arm ABCD, AA′BC and AA′A″B heteroarm star polymers comprising one poly(4-methylphenyl vinyl sulfoxide) segment and other segments such as polystyrene, poly(α-methylstyrene), p...
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Article
Preparation and properties of novel resins based on cyanate ester and hyperbranched polysiloxane
A novel kind of high performance cyanate ester (CE) resins was developed by copolymerizing 2, 2′-bis(4-cyanatophenyl) iso-propylidene with hyperbranched polysiloxane (HBPSi). HBPSi was synthesized through the ...
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Article
Preparation and properties of wheat gluten/rice protein composites plasticized with glycerol
Environment friendly thermosetting composites were prepared by blending wheat gluten (WG) and rice protein (RP) at different weight ratios with glycerol as plasticizer followed by compression molding the mixtu...
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Article
Effects of phenyl-based pendent groups on helical conformation of poly(N-propargylamides)
Five achiral N-propargylamide monomers with various phenyl-based substitutents, [HC ≡ CCH2NHCOR, R for M1: C6H4CH3; M2: C6H4CH2CH3; M3: C6H4(CH2)2CH3; M4: C6H4(CH2)3CH3; M5: C6H4C(CH3)3], were synthesized and pol...
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Article
The amphiphilic multiarm copolymers based on hyperbranched polyester and lysine: Synthesis and self-assembly
The amphiphilic multiarm copolymers were synthesized through the modification of commercially available hyperbranched polyesters (Boltorn H40) with N-ɛ-carbobenzoxy-L-Lysine N-carboxyanhydride (ZLys-NCA). After b...
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Article
Dispersion of graphene oxide and its flame retardancy effect on epoxy nanocomposites
Graphene oxide was prepared by ultrasonication of completely oxidized graphite and used to improve the flame retardancy of epoxy. The epoxy/graphene oxide nanocomposite was studied in terms of exfoliation/disp...
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Article
Synthesis of highly reactive polyisobutylenes with BF3·cyclohexanol initiating system
The selective cationic polymerization of isobutylene (IB) initiated by a BF3·cyclohexanol (CL) complex was carried out from the mixed C4 fraction feed containing the 4C saturated and unsaturated hydrocarbons at −...
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Article
High speed injection molding of high density polyethylene — Effects of injection speed on structure and properties
Thin wall samples of high density polyethylene (HDPE) were prepared via injection molding with different injection speeds ranging from 100 mm/s to 1200 mm/s. A significant decrease in the tensile strength and You...
