Published in Chinese Journal of Polymer Science
A new methacrylamide monomer, hexylamine methacrylamide (MAHA), was synthesized and used in polymerizations. The homopolymer of MAHA and its copolymers were synthesized by free radical polymerization techniques with N-isopropyl acrylamide (NIPAAm) in two different compositions. The quaternization of the homopolymer and copolymers were carried out u...
Published in Chinese Journal of Polymer Science
Rare earth aryloxides substituted by various alkyl groups [Ln(OAr)3] such as methyl, isopropyl and tertbutyl, were used as single component catalysts to affect ring-opening polymerization of L-lactide (LLA). The catalytic activity, polymerization characteristics, polymerization kinetics and the mechanism were studied. It was found that the catalyti...
Published in Chinese Journal of Polymer Science
Poly(methylmetacrylate) (PMMA)/Y0.0025Si0.025Ba0.9725(Ti(0.9)Sn0.1)O3 (YBTS) composites were prepared at different weight ratios of YBTS (0 wt%, 5 wt%, 10 wt% and 20 wt% YBTS) in order to investigate effect of YBTS additions on the electrical and optical properties of PMMA host. The electrical properties (impedance, dielectric constant dielectric l...
Published in Chinese Journal of Polymer Science
Hydroxyapatite/poly(L-lactide) (HA/PLLA) nanocomposites were prepared by the solvent mixing method. The isothermal crystallization behavior was studied by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The results show that the crystallization behavior of HA/PLLA composites was strongly affected by the content of HA...
Published in Chinese Journal of Polymer Science
Long chain semiaromatic polyamides were synthesized by the reactions of decanediamine with various aromatic diacids and characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H-NMR). The thermal behaviors were determined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The s...
Published in Chinese Journal of Polymer Science
Six new optically active and flame-retardant poly(amide-imide)s PAIs 5a–5f containing phosphine oxide moiety as a flame-retardant unit in the main chain were synthesized from direct polycondensation reaction of six chiral N,N′-(pyromellitoyl)-bis-L-amino acid 3a–3f with bis(3-aminophenyl)phenyl phosphine oxide 4 in a medium consisting of N-methyl-2...
Published in Chinese Journal of Polymer Science
In an effort to develop biomaterials to meet guided tissue regeneration (GTR) standards for periodontal tissue recovery, a homogeneous and transparent chitosan (CS)/hydroxyapatite (HA) membrane with potential applications as GTR barrier in periodontal therapy has been prepared via in situ compositing. The membrane has been designed to have a smooth...
Published in Chinese Journal of Polymer Science
Thermal properties of acrylonitrile (AN)-acrylamide (AM) copolymers for carbon fibers were studied by DSC and in situ FTIR techniques in nitrogen (N2) and air flows. The cyclization mechanism and stabilization behavior of polyacrylonitrile (PAN) were discussed. In N2 flow, it was found that AM had the ability to initiate and accelerate cyclization ...
Published in Chinese Journal of Polymer Science
Three dendronized polymers from generation one to generation three have been prepared by complexing negatively charged Fréchet-type dendrons with a polyanion, poly(diallydimethylammonium chloride) (PDADMAC). The grafting degree has been confirmed mainly by elemental analysis. In dilute solutions of tetrahydrofuran, static light scattering studies i...
Published in Chinese Journal of Polymer Science
The stability of full-conjugated self-assembled (SA) multilayer films based on partially doped polyaniline (PANI) as a polycation and poly(o-aminobenzoic acid) (PCAN), poly(aniline-2-sulfonic acid) (PSAN) as polyanions is investigated in alkali aqueous solutions. The self-assembled PANI-PCAN films keep their stability within 24 h in 1 mol/L NaOH so...
