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Physical properties of ethylene vinyl acetate copolymer (EVA)/natural rubber (NR) blend based foam

✍ Scribed by Min-Su Kim; Cha-Cheol Park; Subhendu Ray Chowdhury; Gue-Hyun Kim

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
167 KB
Volume
94
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

In this study an attempt was made to improve the rebound resilience and to decrease the density of ethylene‐vinyl acetate copolymer (EVA) foam. For this purpose, EVA was blended with natural rubber (NR), and EVA/NR blends were foamed at 155°C, 160°C, and 165°C. To investigate the correlation between crosslinking behavior and physical properties of foams, crosslinking behavior of EVA/NR blends was monitored. The physical properties of the foams were then measured as a function of foaming temperatures and blend compositions: 165°C was found to be the optimal temperature for a crosslinking of EVA/NR foam. As a result, the density of EVA/NR blend foamed at 165°C was found to be the lowest. EVA/NR (90/10) blend, foamed at 165°C, showed lower density, better rebound resilience, and greater tear strength than EVA foam. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2212–2216, 2004

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✍ Varaporn Tanrattanakul; Thongsak Kaewprakob 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 429 KB 👁 2 views

## Abstract Ethylene vinyl acetate (EVA, 18 mol % vinyl acetate) and epoxidized natural rubber (ENR, 50 mol % epoxidation) were blended in an internal mixer and compared to EVA. Dicumyl peroxide (DCP) was used as a curing agent. The blends consisted of 10–50 wt % of ENR and were compared with cross