文献类型：期刊文献

英文题名：Polycarbonate Polyurethane Elastomers Synthesized via a Solvent-Free and Nonisocyanate Melt Transesterification Process

作者：Pan Dongdong[1];Tian Hengshui[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2015

卷号：132

期号：7

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20150800546132);WOS:【SCI-EXPANDED(收录号:WOS:000345221800002)】；

语种：英文

外文关键词：polycondensation; polyurethanes; synthesis and processing; thermoplastics

摘要：Soluble and thermally stable polycarbonate polyurethane elastomers were synthesized through a solvent-free and nonisocyanate melt transesterification process. The conditions of this process were studied, and the optimum conditions were as follows: the catalyst dibutyltin oxide dosage was 0.125 wt %, the raw material molar (n) ratio of dimethyl 1,6-hexamethylene dicarbamate (HDC) to poly(carbonate macrodiol) (PCDL) was n(HDC)/n(PCDL) 51: 0.99, the reactants were prepolymerized under 100 degrees C for 1 h and then under 185 degrees C and a high vacuum for 4 h. Three different PCDLs were selected to participate in the reaction under the conditions mentioned previously, and their structures were characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The products obtained from this process were still stable under 280 degrees C. (C) 2014 Wiley Periodicals, Inc.