中国塑料 ›› 2008, Vol. 22 ›› Issue (07): 62-66 .DOI: 10.19491/j.issn.1001-9278.2008.07.012

• 加工与应用 • 上一篇    下一篇

PE-LLD/乙烯基笼形倍半硅氧烷共混熔体的流变行为与力学性能

花东栓,高俊刚,秦江雷   

  1. 河北大学化学与环境科学学院,河北保定071002
  • 收稿日期:2008-03-06 修回日期:1900-01-01 出版日期:2008-07-26 发布日期:2008-07-26

Rheological and Mechanical Properties of PE-LLD/E-POSS Blend

HUA Dong-Shuan,GAO Jun-Gang,QIN Jiang-lei   

  1. College of Chemistry and Environmental Science, Hebei University, Banding 071002,China
  • Received:2008-03-06 Revised:1900-01-01 Online:2008-07-26 Published:2008-07-26
  • Contact: GAO Jun-Gang

摘要: 采用毛细管流变仪研究了线形低密度聚乙烯( PE-LLD)与乙烯基笼形倍半硅氧烷(E-POSS)共混物熔体的流变行为;讨论了共混物的组成、剪切应力、切变速率及温度对熔体流变性、非牛顿指数和挤出膨胀比的影响;测定了共混物的屈服应力、断裂应力和断裂伸长率对E-PUSS含量的依赖性。结果表明,E-PUSS加人量在J%以内和实验温度低于160℃熔体的流动性随切应力增大而变好,假塑性增强,超过3%和高于160℃假塑性降低。PE-LLD/E-PUSS共混物的强度在E-PUSS含量为3%时达到最大。

关键词: 乙烯基笼形倍半硅氧烷, 线形低密度聚乙烯, 流变行为, 力学性能

Abstract: The rhcological behavior of linear low-density polyethylene (PE-LLD)/ethylene-silsesquiox-anc(E-POSS)blend was investigated using a capillary rhcometer. Influences of composition of the blends, shear rate and shear stress on melt apparent viscosity were discussed. ion-Newtonian index(n),swell ratio, conventional yield stress, breaking strength,and breaking extensibility of the blends at different contents of E-POSS were measured.It showed that the PE-LLD/E-POSS blends were pscu-doplastic. When the content of E-POSS was lower than 3%and the temperature was below 160℃,the melt viscosity was lower than that of neat PE-LLD; while the viscosity was higher when the content and temperature became higher. The blends exhibited maximum mechanical properties when the mass frac-tion of E-POSS was 3%.

Key words: ethylene-silsesquioxane, linear low-density polyethylene, rhcological behavior, mechanical property