文献类型：期刊文献

中文题名：乙烯基单体配比对聚合物多元醇的合成及应用影响

英文题名：Effect of ratio of styrene to acrylonitrile on synthesis and application of polymer polyols

作者：张扬[1];宋芬[2];孙莉[1];佘文骊[3];袁茂全[2];欧阳福生[1]

机构：[1]华东理工大学化工学院,上海200237;[2]上海化工研究院吴泾分院,上海200241;[3]上海氯碱化工技术中心,上海200241

年份：2023

卷号：52

期号：12

起止页码：3246

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：国家自然科学基金项目(22108072)。

语种：中文

中文关键词：聚合物多元醇;苯乙烯;丙烯腈;聚氨酯;接枝率

外文关键词：polymer polyols;styrene;acrylonitrile;polyurethane;graft rate

摘要：以基础聚醚为基体,苯乙烯(ST)和丙烯腈(AN)为共聚单体,采用半连续聚合法,考察了m(ST)∶m(AN)对聚合物多元醇(POP)、聚氨酯(PU)软质泡沫性能的影响。结果表明,m(ST)∶m(AN)为2.0时,合成的POP固含量高、黏度较低和VOC含量较低,且POP粒子圆整、均匀,粒径分布较合理,过滤性能好,由此制得的PU软质泡沫的拉伸强度、断裂伸长率、撕裂强度最大,落球回弹率和压陷硬度较高;POP的接枝率随着m(ST)∶m(AN)降低而增大,相应的黏度、过滤性和过滤时间也增大。综合考虑POP的固含量、黏度、VOC量和过滤性能以及PU软质泡沫的力学性能,适宜的m(ST)∶m(AN)为2.0~2.5。研究结果可为POP和PU软质泡沫性能的提升提供指导。
Using basic polyether as substrate,styrene(ST)and acrylonitrile(AN)as copolymers,the effects of the mass ratio of styrene to acrylonitrile[m(ST)∶m(AN)]on the properties of polymer polyols(POP)and soft polyurethanes(PU)foam were investigated by semi-continuous polymerization.The results show that when m(ST)∶m(AN)is about 2.0,the synthesized POP has high solid content,low viscosity and low VOC content,and the POP particles have good roundness,uniformity,filtration performance and size distribution.Therefore,the soft PU foam produced with the POP has the highest tensile strength,elongation at break and tearing strength,and relatively high falling ball rebound rate and indentation hardness.With the decrease of m(ST)∶m(AN),the graft rate of POP increase,and the corresponding viscosity,filtration time and filtration time also increase.Considering the solid content,viscosity,residual monomer content and filtering efficiency of POP and the mechanics performance of soft PU foam,suitable m(ST)∶m(AN)is 2.0~2.5.The research results could provide good guidance to improve the properties of POP and soft PU foam.