应用化学2026，Vol.43Issue(9)：1429-1434,中插1-中插4,10.DOI:10.19894/j.issn.1000-0518.260034
高间规苯乙烯共聚合及对加工性能的影响
High Syndiotactic Styrene Copolymerization and Its Impact on Processing Properties
摘要
Abstract
Using a pyridinylmethylene fluorenyl yttrium complex as the main catalyst,solid methylaluminoxane as a co-catalyst,and triisobutylaluminum as a chain transfer agent,syndiotactic copolymerization of styrene(St)with p-methylstyrene(p-MS)and p-tert-butylstyrene(p-tBS)was achieved at 140℃,yielding two types of syndiotactic styrene copolymers.The influence of comonomer content on the crystallization behavior,thermal properties,mechanical performance,and processing flowability of the copolymers was investigated.The results indicated that increasing the content of either comonomer significantly reduced the melting point and crystallinity of the syndiotactic copolymers,thereby broadening the processing window:the melting point decreased from approximately 270.0℃for pure sPS to 207.8℃,while crystallinity dropped from 50%to 30%.Although crystallinity decreased,tensile strength remained well maintained.The copolymer containing 20%(molar percent)p-methylstyrene exhibited a tensile strength of 40.6 MPa,while the copolymer containing 20%(molar percent)p-tert-butylstyrene reached 44.4 MPa.Furthermore,the melt flow index of the copolymer samples outperformed that of the pure sPS reference sample(Idemitsu's pure syndiotactic polystyrene,grade SPS-130),demonstrating excellent processing fluidity.关键词
间规聚苯乙烯/对甲基苯乙烯/对叔丁基苯乙烯/结晶行为/加工性能/共聚合Key words
Syndiotactic polystyrene/p-Methylstyrene/p-Tert-butylstyrene/Crystallization behavior/Processability/Copolymerization分类
化学化工引用本文复制引用
孙广辉,李桂珍,寇晓丽,赵海云,刘洪刚,吕洋洋,刘新立..高间规苯乙烯共聚合及对加工性能的影响[J].应用化学,2026,43(9):1429-1434,中插1-中插4,10.基金项目
吉林省科技发展计划项目(No.SKL202602005JC)资助 Supported by the Jilin Province Science and Technology Development Plan Project(No.SKL202602005JC) （No.SKL202602005JC）
