咪唑基离子液体[C_(14)mim]Br对LLDPE结构与性能的影响  

The Influence of 1-n-Tetradecyl-3-Methylimidazolium Bromide on the Structure and Properties of LLDPE

作　　者：唐海欧[1] 丁运生[1] 吴淑莹[1] 张效敏[1] 熊仁艳[1] 陈龙[1] 查敏 李长林[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]上海普利特复合材料股份有限公司,上海201707

出　　处：《高分子材料科学与工程》2009年第11期83-85,89,共4页Polymer Materials Science & Engineering

基　　金：安徽省年度重点科研项目(06022016);安徽省重点攻关项目(07010202025)

摘　　要：应用离子液体[C14mim]Br和线型低密度聚乙烯(LLDPE)熔融共混,制备出LLDPE/[C14mim]Br共混物,并对共混物结构与性能进行了表征与测试。结果表明,随着[C14mim]Br在共混物中含量的增加,LLDPE晶粒尺寸变大,而且在相同的降温速率下,[C14mim]Br使LLDPE起始结晶温度提高,表明[C14mim]Br起到了异相成核的作用。[C14mim]Br加入量为2.0 phr时,材料抗静电性能最好,表面电阻为1.8×108Ω。随着[C14mim]Br添加量的增加,材料的熔融指数有增加的趋势,而且材料拉伸强度先增大,后逐渐减小,冲击强度先减小,后逐渐增大,[C14mim]Br起到了反增塑与增塑的作用。Linear low density polyethylene （LLDPE）/[C14mim]Br blends were prepared via melting blend, with the structure and properties of the blends determined and tested. Results of testing indicate that [C14mim]Br can have a heterogeneous nucleating effect in the matrix, which makes the crystal of LLDPE grow bigger with increasing amount of [C14mim]Br. The onset crystallization temperature of the blends is higher than that of neat LLDPE at the same cooling rates. In addition, the presence of [C14mim]Br can improve the antistatic properties of LLDPE apparently. The lowest surface resistance is 1.8×10^8Ω with about 2.0 phr content of [C14mim]Br in the blends. Moreover, the melt index of LLDPE increases with the amount of [C14mim] Br increasing. As for mechanical properties, the tensile strength increases at first then decreases slowly, while the impact strength presents the opposite results when the dosage of [C14mim]Br increases in the LLDPE, so [C14mim]Br plays an anti-plasticized and plasticized role to PP.

关 键 词：N-十四烷基-N'-甲基溴化咪唑盐 线型低密度聚乙烯 共混 结构与性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]