光稳定剂对纤维级聚苯硫醚流变行为的影响  

Influence of Light Stabilizers on Rheological Behavior of Fiber-Grade Polyphenylene Sulfide

作　　者：王升[1] 刘鹏清[1] 胡安[1] 徐建军[1] 叶光斗[1] 

机构地区：[1]四川大学高分子材料工程国家重点实验室,高分子科学与工程学院,四川成都610065

出　　处：《高分子材料科学与工程》2010年第12期57-60,共4页Polymer Materials Science & Engineering

基　　金：国家支撑计划(2008BAE59B03)

摘　　要：以纤维级聚苯硫醚(PPS)树脂为原料,采用毛细管流变仪在剪切速率50s-1～3000s-1范围内研究了不同光稳定剂对PPS流变行为的影响。结果表明,不同光稳定剂的加入对PPS非牛顿指数影响较小,且随温度升高都趋向于0.9;在剪切速率为0s-1～487s-1范围内,PPS会出现"剪切增稠"现象,而光稳定剂炭黑和受阻胺的加入起一定的抑制作用;在高剪切区487s-1～3000s-1范围内,PPS结构黏度指数随温度的升高而减小,减小的程度越低,则熔体结构越稳定,可纺性越好;光稳定剂的加入会使PPS的粘流活化能减小。Influence of different light stabilizers on rheological behavior of the fiber-grade polyphenylene sulfide （PPS） resins was studied,which used high-pres sure capillary rheometer with the range of share rating from 50 s-1 to 3000 s-1. The results show that,different light stabilizers have few effects on non-Newtonian indexes of PPS which tended to 0.9 with the increase of temperature; PPS shows ＂ shear-thickening＂ when the share rating is between 0 s-1 and 487 s-1,and carbon black and hindered amine light stabilizer can restrain the phenomenon in a certain extent; the structural viscosity is reduced with the increase of temperature when the share rating is between 487 s-1 and 3000 s-1,and lower extent of reducing,better stabilization of PPS structure and spinnability,light stabilizerscause the viscous flow activation energies of PPS getting decreased.

关 键 词：聚苯硫醚 光稳定剂 流变行为 可纺性 

分 类 号：O631.21[理学—高分子化学]