期刊
POLYMER
卷 46, 期 12, 页码 4160-4165出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2005.02.059
关键词
blends; networks; vulcanization
High cis, 1,4-polyisoprene (PI) and polyvinylethylene (PVE) form a miscible blend, having a lower critical solution temperature (LCST). Networks of this blend were prepared by crosslinking with organic peroxide or by sulfur vulcanization. The very different reactivity of the two polymers leads to a disparity in the crosslinking, especially for sulfur curing-networks of PI can be formed without substantial reaction of the PVE. When the sulfur vulcanization is carried out at ca. 130 degrees C or higher (above the LCST), the polymers phase separate, yielding a PI network with PVE domains. Curing at lower temperatures maintains the miscible morphology, and a homogeneous blend network is obtained. (c) 2005 Elsevier Ltd. All rights reserved.
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