摘要
本文以硫磺和对二氯苯为原料，在极性有机溶剂中合成聚苯硫醚（ＰＰＳ），加入含活性基团的二卤代苯作为共聚第三单体。研究表明，２，５－二氯硝基苯是一种较好的扩链剂，－ＮＯ＿２在反应中将被还原为－ＮＨ＿２，且－ＮＨ＿２在高温下与芳环进一步发生支化反应。当２，５－二氯硝基苯含量低于２％时，控制反应条件，能制得性能优良的支化反应型高分子量ＰＰＳ树脂。由于共聚第三单体量少，共聚物与中等分子量ＰＰＳ树脂具有相近的结构，而热稳定性则显著提高。
Branching-reactive-high-molecular-weight Poly (Phenylene Sulfide) (BMMWPPS) Wasprepared.from sulfur and P-dichlorobenzene (P-DCB) in polar organic solvent 2, 5-dichloronitrobenzene (2 .5-DCNB) being used as third monomer ([2 ,5-DCNB]/[P-DCB]<2%,molar ra tio )in the copolycondensation. The chain propogation of PPS might be nucleophilic substitution.2 .5-DCNB is a satisfactory chain extender agent in the reaction of preporation . Part of -NO_2 wasreduced to-NH_2 as two-Cl of 2. 5-DCNB been substituted,and-NH_2 furthermore reacted withbenzene nucleus to give branch chain in high temperature, the BRHMWPPS is still crystallinepolymer.yet thermal atability of copolynmer have been inproved a great deal.
出处
《化学研究与应用》
CAS
CSCD
1995年第3期271-276,共6页
Chemical Research and Application
基金
"八六三"计划资助项目
关键词
聚苯硫醚
共缩聚
扩链剂
二氯硝基苯
Polyphenylene sulfide (PPS).Copolycondensation,Chain extender agent
