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聚合物熔体界面分子链扩散的流变学研究

DOI: 10.3724/SP.J.1105.2013.12261, PP. 361-366

Keywords: 界面扩散,流变学响应,频率依赖行为,聚合物熔体

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Abstract:

以2种完全相容的多分散的聚合物树脂为研究对象,利用动态流变学手段实现了界面分子链扩散过程的实时检测.研究结果发现,完全相容的聚合物树脂之间的扩散动力学参数α具有相对分子质量差异的依赖性,两者之间相对分子质量差异越大,α值越大.通过流变学参数还可获得另一扩散动力学参数—特征时间tc,从而得以计算出组分之间扩散系数,研究结果表明所获得的扩散系数具有频率依赖性.

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