中国塑料 ›› 2009, Vol. 23 ›› Issue (06): 35-39 .DOI: 10.19491/j.issn.1001-9278.2009.06.008

• 材料与性能 • 上一篇    下一篇

PE-HD/纳米SiO2杂化材料的等温结晶行为的研究

施海华 郁加华 熊煦 龚方红   

  1. 江苏工业学院
  • 收稿日期:2009-02-18 修回日期:2009-04-02 出版日期:2009-06-26 发布日期:2009-06-26

Isothermal Crystallization Behavior of PE-HD/Nano-SiO2 Hybrid Materials

SHI Hai-hua   

  • Received:2009-02-18 Revised:2009-04-02 Online:2009-06-26 Published:2009-06-26
  • Contact: SHI Hai-hua

摘要: 通过熔融接枝反应将乙烯基三甲氧基硅烷接枝到高密度聚乙烯(PE-HD)分子链上,以四乙氧基硅烷为前驱体,加入接枝的PE-HD中,通过溶胶-凝胶法制备了PE-HD/纳米SiO2杂化材料。用差示扫描量热法研究了纳米SiO2 对PE-HD等温结晶行为的影响。结果表明,随着结晶温度的提高,PE-HD和PE-HD/纳米SiO2杂化材料等温结晶峰明显右移,说明结晶所用时间延长,结晶速率下降;纳米SiO2在PE-HD中起到异相成核的作用,使PE-HD/纳米SiO2的结晶速率比PE-HD的大。等温结晶动力学研究表明,随着结晶温度的提高,两种材料的半结晶期都有所延长,且PE-HD/纳米SiO2杂化材料比PE-HD延长的幅度更大。

关键词: 动力学, 高密度聚乙烯, 纳米二氧化硅, 杂化, 等温结晶

Abstract: Vinyl trimethoxysilane (VTMS) was grafted onto polyethylene (PE-HD) via melt grafting reaction. The grafted PE-HD was allowed to react with forming PE-HD/nano-SiO2 hybrid materials via sol-gel process. The influence of nano-SiO2 on the crystallization behavior of PE-HD was studied with differential scanning calorimetry. It showed that for both PE-HD and PE-HD/nano-SiO2 hybrid materials, the crystallization rate decreased with increasing crystallization temperature. Nano-SiO2 acted as sites for heterogeneous nucleation. The result of isothermal crystallization kinetics showed that the half-crystallization time of both PE-HD and PE-HD/nano-SiO2 hybrid materials increased with increasing crystallization temperature.

Key words: kinetics, high density polyethylene, nano-silicon dioxide, hybrid, isothermal crystallization

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