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Chain structure, phase morphology, and toughness relationships in polymers and blends

โœ Scribed by Souheng Wu

Publisher
Society for Plastic Engineers
Year
1990
Tongue
English
Weight
869 KB
Volume
30
Category
Article
ISSN
0032-3888

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โœฆ Synopsis

Abstract

We present chain structure, phase morphology, and toughness relationships in thermoplastic polymers and polymer/rubber blends. In neat polymers, molecular aspects of craze/yield behavior are controlled by two chain parameters: entanglement density ฮฝ~e~ and characteristic ratio C~โˆž~. The crazing stress is proportional to ฮฝ, and the yield stress is proportional to C~โˆž~. The dispersed rubber toughens a polymer/rubber blend mainly by promoting energy dissipation of the matrix. The toughening efficiency correlates with the rubber phase morphology and the chain structure of the matrix.

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