高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 711.

• 论文 • 上一篇    下一篇

原位聚合制备聚乙烯/蒙脱土(MMT)纳米复合材料的研究

杨凤1, 赵海超1, 张学全2, 黄葆同2, 冯之榴2   

  1. 1. 东北大学理学院, 沈阳 110006;
    2. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:2001-12-03 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 张学全(1962年出生),男,研究员,博士生导师,主要从事烯烃可控聚合及纳米复合材料研究E-mail:xqzhang@ciac.jl.cn E-mail:xqzhang@ciac.jl.cn

Preparation of Polyethylene/Montmorillonite(MMT) Nanocomposite by in situ Polymerization

YANG Feng1, ZHAO Hai Chao1, ZHANG Xue Quan2, HUANG Bao Tong2, FENG Zhi Liu2   

  1. 1. Institute of Science, Northeast University, Shenyang 110006, China;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2001-12-03 Online:2003-04-24 Published:2003-04-24

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被引次数

88

摘要： 利用MgCl2在醇中溶解和蒙脱土(MMT)在醇中层间膨胀的特性,制备了MgCl2/TiCl4负载于MMT层间的MMT/MgCl2/TiCl4催化剂,并通过原位聚合合成了聚乙烯/蒙脱土纳米复合材料.经广角X射线衍射(WAXD)和透射电子显微镜(TEM)分析表明,蒙脱土片层在乙烯聚合过程中发生了层间剥离,以单片层或几片层共存的形式无规地分散于聚乙烯基质中.与分子量相近的纯聚乙烯相比,极低的蒙脱土含量(质量分数<1%)能使复合材料的屈服强度、拉伸强度和拉伸模量有很大提高.复合材料中蒙脱土片层以纳米尺寸在聚乙烯基质中的良好分布和对聚乙烯分子链运动的限制作用是力学性能提高的主要因素.

关键词: 原位聚合, 聚乙烯, 蒙脱土, 纳米复合材料

Abstract: Polyethylene(PE)/montmorillonite(MMT) nanocomposites were prepared by in situ coordination polymerization by using a MMT MgCl2 TiCl4 catalyst activated by Al(Et)3. The catalyst was prepared by firstly diffusing MgCl2 into the swollen MMT layers, followed by loading TiCl4 on the inner/outer layer surfaces of MMT where MgCl2 already deposited on. The intercalation of MMT layers by MgCl2 and TiCl4 was demonstrated by the enlarged spacing between neighboring layers measured from WAXD patterns. The nano scale dispersion of MMT layers in the polyethylene matrix was characterized by WAXD and TEM observation. As consequence, tensile strength and tensile modulus of the nanocomposite materials were significantly improved as compared to virgin polyethylene of comparable molecular weight. The strong interaction between the uniformly dispersed nano dispersed montmorillonite layers and the resin matrix was thought to account for the remarkably enhancement in tensile properties.

Key words: In situ polymerization, Polyethylene, Montmorillonite, Nanocomposite

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