Microphase separation/crosslinking competition-based ternary microstructure evolution of poly(ether-b-amide).

ABSTRACT: The temperature dependence of the rheological properties of poly(ether-b-amide) (PEBA) segmented copolymer under oscillatory shear flow has been investigated. The magnitude of the dynamic storage modulus is affected by the physical microphase separation and irreversible crosslinking network, with the latter spontaneously forming between the polyamide segments and becoming the dominant factor in determining the microstructural evolution at temperatures well above the melting point of PEBA. From the rheological results, the initial temperature of the rheological properties dominated by the microphase separation and crosslinking (T _cross) structures were determined, respectively. Based on the two obtained temperatures, the microstructure evolution upon the heating can

SUBMITTER: Wang Y 

PROVIDER: S-EPMC8694882 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature