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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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