Short-time relaxation at polymeric interfaces.
Short-time relaxation at polymeric interfaces.
复制标题
聚合物界面的短时弛豫。
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
Russell
中科院分区：
文献类型：
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作者：
Karim;Mansour;Felcher;Russell
用中子反射法研究了高分子长链在两种熔体界面上的相互扩散随时间的变化。研究的时间范围从单个片段的运动的时间特性（Rouse时间，{tau}{sub {ital}}）跨越到整个分子的质量中心移动回转半径（爬行时间）的时间。至少对于{ital t}{gt}{tau}{sub {ital e}}，扩散速率随时间减慢，直到达到体扩散速率，这与熔体中聚合物链运动的当前理论一致。
The interdiffusion of long polymer chains at the interface of two melts has been studied as a function of time by neutron reflection. The time range studied spanned from the time characteristic of the motion of the single segment (Rouse time, {tau}{sub {ital e}}) up to the time at which the center of mass of the whole molecule has moved a radius of gyration (reptation time). At least for {ital t}{gt}{tau}{sub {ital e}}, the diffusion rate slows down with time until the bulk diffusion rate is reached, in agreement with the current theories for the motion of a polymeric chain in a melt.