Observation of deformation and recovery of poly(isobutylene) droplet in a poly(isobutylene)/poly(dimethyl siloxane) blend after application of step shear strain
Observation of deformation and recovery of poly(isobutylene) droplet in a poly(isobutylene)/poly(dimethyl siloxane) blend after application of step shear strain
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DOI：
10.1122/1.550932
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发表时间：
1998-04
影响因子：
3.3
通讯作者：
H. Yamane;Masaoki Takahashi;R. Hayashi;Kenzo Okamoto;H. Kashihara;T. Masuda
中科院分区：
文献类型：
--
作者：
H. Yamane;Masaoki Takahashi;R. Hayashi;Kenzo Okamoto;H. Kashihara;T. Masuda
在大的阶跃剪切应变作用下，从两个方向直接观察到嵌在聚二甲基硅氧烷基体中的低粘度聚异丁烯液滴的变形和恢复。液滴的形状和恢复时间强烈依赖于所施加的应变的大小。在施加大的应变后，液滴几乎变形成扁平的椭球体。然后，它变成一个棒状的形状，哑铃，旋转椭球体，最后变成一个球体。模型计算表明，形状恢复的主要驱动力是界面能，以减少变形液滴的表面积。
The deformation and recovery of a poly(isobutylene) droplet with a lower viscosity embedded in a poly(dimethyl siloxane) matrix are directly observed from two directions after application of a large step shear strain. The droplet shape and recovery time strongly depended on the magnitude of the applied strain. Just after application of a large strain, a droplet deforms almost affinely to a flat ellipsoid. It then changes into a rodlike shape, a dumbbell, and to an ellipsoid of revolution, and finally to a sphere. Model calculations show that the primary driving force for the shape recovery is the interfacial energy in order to reduce the surface area of the deformed droplet.