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真强必胜: 金币+1, 谢谢 2013-12-16 18:03:20
zb6824785: 金币+30, 翻译EPI+1, ★★★★★最佳答案 2013-12-18 11:48:35
Studies  of the influence of dynamic mechanical properties of butyl rubber by the type and amount of carbon black (IIR)  showed that with the increase of the size of the carbon black particle  , little  tan δ changed at around -1.5 ℃corresponding to the temperature, but the tan δ max values ​​were significantly increased. With glass transition region gradually widened, the   storage modulus E 'decreased. The larger Charcoal Black  diameter, the less jointed rubber   to form in the rubber matrix and the lower crosslinking density. When the rubber subjected to alternating stress , rubber macromolecular chains are likely  slide over the  surface of the carbon black . The  friction between the  rubber molecular chain and the surface of   carbon black caused higher  energy  loss  and the vulcanized rubber loss factor peak   rised . With the  increasing use of carbon black N990, the glass transition region of the vulcanized rubber IIR is gradually narrowed , tan δ peak became smaller and the Tg increased slightly.
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