成核剂对聚丁烯结晶行为及力学性能的影响

李娜, 刘晨光*, 贺爱华

（青岛科技大学 高分子科学与工程学院；橡塑材料与工程教育部重点实验室，山东 青岛 266042）

摘要： 考察了3种不同种类的成核剂对PB（聚丁烯）性能的影响，重点分析了其中2种成核剂对PB力学性能和结晶性能的影响。结果表明：随着成核剂用量的增加，PB的拉伸强度、弯曲强度和Shore D硬度总体呈现先升高再降低的趋势，而冲击强度首先呈现明显的下降，而后逐渐保持稳定；成核剂的加入明显提高了PB的结晶温度和结晶度，加快了结晶速率及晶型转变速率。

关键词： 聚丁烯； 成核剂； 结晶性能； 力学性能

中图分类号： TQ 325.1+5                                文献标志码： A

 Effects of Nucleating Agents on Crystallization and

Mechanical Properties of Polybutylene

LI Na， LIU Chenguang， HE Aihua

（College of Polymer Science and Engineering； Key Laboratory of RubberPlastics, Ministry of Education,

Qingdao University of Science and Technology, Qingdao 266042,China）

Abstract： The effects of three kinds of nucleating agents on properties of PB were investigated, and effects of these nucleating agents on mechanical properties and crystallinity of PB were analyzed significantly. The results show that with the increasing of nucleating agents,the tensile strength, bending strength and shore D of PB increase firstly and then decrease on the whole; but the impact strength decrease firstly and then gradually becomes stable. The crystallization temperature and the degree of crystallinity of PB increased, the crystallization rates were accelerated obviously by adding nucleating agents.

Key words: polybutene; nucleating agent; crystallinity; mechanical properties

 收稿日期： 20140402

基金项目： 国家科技支撑计划项目(2011BAE26B05).

作者简介： 李娜（1985─），女，硕士研究生.              *通信联系人.