文献类型：期刊文献

中文题名：分散剂的结构对苯乙烯/丙烯腈在聚醚多元醇中分散共聚合的影响

英文题名：Influence of Dispersant Structures on Dispersion Polymerization of Styrene and Acrylonitrile in the Presence of Polyether

作者：吴亮衡[1];张杰[1]

机构：[1]华东理工大学材料科学与工程学院,上海市先进聚合物材料重点实验室,上海200237

年份：2016

卷号：34

期号：2

起止页码：223

中文期刊名：材料科学与工程学报

外文期刊名：Journal of Materials Science and Engineering

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：分散剂;接枝共聚;聚合物多元醇;分散聚合;顺反异构体

外文关键词：Dispersants;Grafted copolymerization;Polymer polyols;Dispersion copolymerization;Cistrans isomers

摘要：将马来酸酐接枝到聚醚多元醇(PPO)中,并经端基环氧丙烷化和异构化反应,合成了不同结构的大分子齐聚物,并用于苯乙烯/丙烯腈在聚醚多元醇中的分散聚合,合成了聚合物多元醇(POP)。采用核磁共振分析表征了大分子齐聚物的结构和异构化程度;采用透射电子显微镜、激光粒度分析,对POP中粒子的微观形貌、粒径(D(4,3))大小及其分布(PDI)进行了表征。结果表明,大分子齐聚物中反式结构含量越高,所合成POP中粒子的D(4,3)及其PDI越小;随着大分子齐聚物用PPO官能度由2增加到6,支链分子量由1000增加到2000,POP中粒子的D(4,3)和PDI越小;随着D(4,3)和PDI的减小,POP体系的粘度显著降低。
Polymer polyols(POP)were synthetized by in-situ dispersion polymerization in order to investigate the relationship between the structures of dispersants and the properties of the POP.The investigation is intended to provide a theoretical concept to get high solid and low viscosity POP products.Maleic anhydride was grafted to the polyether polyol(PPO)and capped with propylene epoxide,and then an isomerization reaction was made to prepare a series of dispersants,which were used to synthetize POP with styrene and acrylonitrile.The cis-trans rate was characterized by 1 H-NMR.The particle size(D(4,3)),distributions(PDI)and morphology were tested by laser particle size analyzer and TEM.Result shows,the POP particles have a bimodal or multimodal distribution with the increase in trans-structure rate and the reduction of(D(4,3))and PDI.When functionality of dispersants(f)is 3,with length of each(m)chain increased from 1000 to 2000,D(4,3)/PDI of particles reduced from 8.220um/54.80 to 0.227um/3.21.When m is 2000,with f increased from 2to 6,D(4,3)/PDI of particles reduced from 5.109um/45.60 to about0.250um/3.3.With D(4,3)and PDI of particles in POP decreased,the viscosity of POP reduced constantly.