Morphology and properties of nanocomposites formed from ethylene-vinyl acetate copolymers and organoclays

Lili Cui, Xiaoyan Ma, D. R. Paul

科研成果: 期刊稿件文章同行评审

90 引用 (Scopus)

摘要

A series of ethylene-vinyl acetate copolymers, EVA, containing 0-40% VA and three organoclays, M2(HT)2, M3(HT)1 and (HE)2M1T1, were melt processed to explore the relationship between the polarity of the polymer matrix and the organoclay structure on the extent of exfoliation and properties of the resulting nanocomposites. The degree of exfoliation of the nanocomposites was evaluated by TEM, WAXS, and mechanical testing. Quantitative particle analyses of TEM images were made to give various averages of the clay dimensions and aspect ratio. The results from different techniques were generally consistent with each other. These EVA copolymer nanocomposites show dramatically improved exfoliation of the organoclay as the VA content is increased. Nanocomposites based on the organoclay with two alkyl tails always gave better exfoliation than those based on the organoclays with a single tail at all VA levels; however, the relative advantage of the two tails versus one tail seems to diminish with increased VA level. The predictions of tensile modulus using a simple composite model based on Halpin-Tsai equations show rather good agreement with the experimental data.

源语言英语
页(从-至)6325-6339
页数15
期刊Polymer
48
21
DOI
出版状态已出版 - 5 10月 2007

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