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Conformational deformation of linear polymers in injection‐molded parts

 

作者: Masahiko Okumura,   Mitsuru Nagasawa,  

 

期刊: Journal of Rheology  （AIP Available online 1993）
卷期: Volume 37, issue 3  

页码: 564-564

 

ISSN:0148-6055

 

年代: 1993

 

DOI:10.1122/1.550426

 

出版商: The Society of Rheology

 

关键词: Injection molding;Birefringence;Polystyrene;Molecular conformation;Leonov’s constitutive equation;POLYMERS;BIREFRINGENCE;DEFORMATION;CONFORMATIONAL CHANGES;POLYSTYRENE;STRESSES;STRESS−STRAIN RELATION

 

数据来源: AIP

 

摘要:

The birefringence in injection molds of noncrystalline linear polymers arises from two different kinds of deformation; one incorporated with the change of intersegmental distance and one with the deformation of molecular conformation. Their contributions to birefringence were separately observed in injection‐molded polystyrene. The birefringence originating from the molecular‐conformational deformation was compared with computer simulation results, in which the rheology constitutive equation of Leonov was employed to calculate the shear and the normal stresses.

 

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