Observation of deformation and recovery of poly(isobutylene) droplet in a poly(isobutylene)/poly(dimethyl siloxane) blend after application of step shear strain
作者:
Hideki Yamane,
Masaoki Takahashi,
Rika Hayashi,
Kenzo Okamoto,
Hisahiko Kashihara,
Toshiro Masuda,
期刊:
Journal of Rheology
(AIP Available online 1998)
卷期:
Volume 42,
issue 3
页码: 567-580
ISSN:0148-6055
年代: 1998
DOI:10.1122/1.550932
出版商: The Society of Rheology
关键词: Blends;Droplets
数据来源: AIP
摘要:
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.
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