Study on a water-swellable rubber compatibilized by amphiphilic block polymer based on poly(ethylene oxide) and poly(butyl acrylate)

✍ Scribed by Caiqi Wang; Guo Zhang; Yuping Dong; Xingfang Chen; Huimin Tan

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 251 KB
• Volume: 86
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.10950

✦ Synopsis

Abstract

A water‐swellable rubber (WSR), compatibilized by the amphiphilic block copolymer, has been prepared by blending a natural rubber (NR) matrix with crosslinked sodium polyacrylate (CSP), poly(ethylene oxide)‐b‐poly(butyl acrylate) (PEO‐b‐PBA), poly(ethylene glycol) (PEG), reinforced filler, and vulcanizing agents. The preparation process was described. The microphase structure of WSR was characterized by a scanning electron microscopy (SEM) photograph. The dependence of the degree of the water‐absorbing and the water‐swelling, the water‐absorbing and water‐swelling rates on CSP, PEG, and PEO‐b‐PBA contents were investigated. The compatibilizing mechanism of PEO‐b‐PBA on WSR was studied. And the optimum composition range was identified: CSP (30–60 phr), PEG (10–20 phr) PEO‐b‐PBA (PEO/PBA = 0.36, 5 phr). © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 3120–3125, 2002