發(fā)布時間：2018-08-09 19:23

【摘要】：利用不同產地高嶺土存在徑厚比的差異,將7個不同產地的高嶺土通過乳液共混法制備了高嶺土/丁苯橡膠復合材料,研究了徑厚比對高嶺土在丁苯橡膠中分散形態(tài)的影響。并結合橡膠分子鏈-高嶺土3種作用模型,研究了"連續(xù)式"和"孤島式"兩種分散形態(tài)對復合材料動態(tài)性能的影響機理。研究表明,徑厚比較大的高嶺土傾向于在復合材料中形成"連續(xù)式"的分散網絡,徑厚比較小的高嶺土則傾向于"孤島式"分散。當高嶺土在橡膠基體中呈現(xiàn)"連續(xù)式"分散網絡時,板狀高嶺土將丁苯橡膠基體分割成彼此相互獨立的單元,同時提高了復合材料的儲能模量及損失模量。
[Abstract]:The kaolin / styrene-butadiene rubber (SBR) composites were prepared by emulsion blending of kaolinite from seven different producing areas. The effect of diameter to thickness ratio on the dispersion morphology of kaolin in SBR was studied. The influence mechanism of "continuous" and "isolated island" dispersion forms on the dynamic properties of composites was studied by using three models of rubber molecular chain-kaolin interaction. The results show that kaolin with large diameter thickness tends to form a "continuous" dispersion network in composite materials, while kaolin with small diameter thickness tends to be "islanding" dispersion. When the kaolin presents a "continuous" dispersion network in the rubber matrix, the plate-like kaolin divides the SBR matrix into mutually independent units, and increases the storage modulus and the loss modulus of the composites.
【作者單位】： 中國礦業(yè)大學(北京)化學與環(huán)境工程學院;中國礦業(yè)大學(北京)地球科學與測繪工程學院;
【基金】：國家自然科學基金重點項目(51034006)
【分類號】：TB332;TQ333.1

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