Nanostructured Thermoplastic Vulcanizates by Selectively Cross-Linking a Thermoplastic Blend with Similar Chemical Structures

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• 作者：Yanchun Tang ; Kai Lu ; Xiaojun Cao ; Yongjin Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：September 4, 2013
• 年：2013
• 卷：52
• 期：35
• 页码：12613-12621
• 全文大小：528K
• 年卷期：v.52,no.35(September 4, 2013)
• ISSN：1520-5045

文摘

Ethylene vinyl acetate rubber (vinyl acetate (VA) content = 50 wt %) (EVM) and ethylene vinyl acetate copolymer (VA content < 50 wt %) (EVA) are polymers with a very similar chemical structure. In this study, a novel thermoplastic vulcanizate (TPV) based on EVM/EVA28 (VA content = 28 wt %) blend has been successfully fabricated by dynamic vulcanization due to the selective cross-linking of EVM. The morphologies and properties of the TPVs have been investigated. It was found that the cross-linked EVM phase and the thermoplastic EVA28 phase form a perfect cocontinuous structure with the rubber phase size of about 100 nm. The fabricated TPV exhibits not only excellent stretchability (>900% elongation at break), nice elasticity (only about 19% remnant strain at 100% stretching), and good flexibility but also superior oil resistance.