摘要
用硫磺、对二氯苯为原料,在极性有机溶剂中,以1,2,4-三氯苯作共聚反应第三单体,共缩聚制得了微支化型高分子量聚苯硫醚(PPS)树脂,在缩聚反应中,第三单体量一定时,一定时间内聚合物对数低切变粘度值与反应时间具有线性关系。聚合物经元素分析,红外光谱分析、X射线衍射分析、激光拉曼光谱分析以及热分析表明,微量(<1.0%)三氯苯引入分子链对PPS的组成和结构影响不大,产品仍为结晶性高聚物,不含双硫键。由于分子量提高,聚合物的热稳定性得到提高,根据不同需要合成的一定分子量范围的微支化型高分子量PPS树脂不经热氧交联处理即可直接挤出造粒,用于注射成型和挤出成型。
The micro branch high molecular weight poly(phenylene sulfide)(MBHMWPPS)was prepared from sulfur and P-dichlorobenzene (P-DCB) in polar organic solvent by useing 1,2,4-trichlorobenzene( TCB) as third monomer([TCB]/[P-DCB]<1. 0%, molar ratio) of copolycondensation, There are a linear relation between t (reaction time of the third monomer)and lnη(η is low shear viscosity of copolymer at 303℃).The yielding copolymer was characterized by low shear viscosity, intrinsic viscosity, elemental analysis, IR spectroscopy,Raman spectroscopy, Xray diffraction and thermal analysis . The results show that the copolymet is MBHMWPPS(η_(inh)=0. 22  ̄0.45,=3.5×10 ̄4~9. 1×10 ̄4).Because the quantity of the third monomer are very small,the vaciation of compostity and structure of the copolymer are very little, the MBHMWPPS is still crystalline polymer, however,T_g and T_m of copolymer raise and thermal stability have a great increase with molecular weigh of PPS increase.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第2期52-56,共5页
Polymer Materials Science & Engineering
基金
国家"八六三"资助