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The Influence of Modification of Mesoporous Silica with Polyethylene Via In Situ Ziegler—Natta Polymerization on PE/MCM-41 Nanocomposite

Key Laboratory of Applied Technology of Polymer Materials (Shenyang Institute of Chemical Technology), the Education Department of LiaoNing Province, Shenyang, 110142, China, iamwangna{at}sina.com

Zhao-Xin Shi

Key Laboratory of Applied Technology of Polymer Materials (Shenyang Institute of Chemical Technology), the Education Department of LiaoNing Province, Shenyang, 110142, China

Jing Zhang

Key Laboratory of Applied Technology of Polymer Materials (Shenyang Institute of Chemical Technology), the Education Department of LiaoNing Province, Shenyang, 110142, China

Lei Wang

Key Laboratory of Applied Technology of Polymer Materials (Shenyang Institute of Chemical Technology), the Education Department of LiaoNing Province, Shenyang, 110142, China

An organic/inorganic nanocomposite of polyethylene (PE) was prepared by compounding techniques. Uniform mono-dispersed spherical MCM-41 nano-particles were modified with polyethylene (PE) prepared by in situ Ziegler—Natta polymerization. The catalyst was first supported on the surface or in the mesopores of MCM-41 particles to subsequently initiate the polymerization of ethylene on the surface or in the mesopores of MCM-41. XRD and N ₂ adsorption analysis attested to ethylene polymerization within the mesopores of MCM-41. When MCM-41 modified with a PE layer was mixed with commercialized PE by melt blending, the strong interaction between the dispersed MCM-41 nano-particles and the resin matrix resulted in the formation of a kind of organic/inorganic network, which provided better mechanical performance than the composite from MCM-41 without a PE layer. The tensile modulus, tensile strength and elongation at break were improved by 24.7, 28.3, and 23.5% in comparison with pure PE composites.

Key Words: nanocomposites • polyethylene • mesoporous silica • interfaces • Ziegler—Natta polymerization.

Journal of Composite Materials, Vol. 42, No. 12, 1151-1157 (2008)
DOI: 10.1177/0021998308088568


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