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

Abstract

Abstract: Polyethylene(PE)/montmorillonite(MMT) nanocomposites were prepared by in situ coordination polymerization by using a MMT MgCl₂ TiC_l4 catalyst activated by Al(Et)₃. The catalyst was prepared by firstly diffusing MgCl₂ into the swollen MMT layers, followed by loading TiC_l4 on the inner/outer layer surfaces of MMT where MgCl₂ already deposited on. The intercalation of MMT layers by MgCl₂ and TiC_l4 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

CLC Number:

O631

TrendMD:

YANG Feng, ZHAO Hai Chao, ZHANG Xue Quan, HUANG Bao Tong, FENG Zhi Liu . Preparation of Polyethylene/Montmorillonite(MMT) Nanocomposite by in situ Polymerization[J]. Chem. J. Chinese Universities, 2003, 24(4): 711.

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

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