✦ LIBER ✦

Thermal, Optical, and Static/Dynamic Mechanical Properties of Linear-core Crosslinked Star Polymer Blends

✍ Scribed by Steven Spoljaric; Tor Kit Goh; Anton Blencowe; Greg G. Qiao; Robert A. Shanks

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 377 KB
Volume: 212
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.201100143

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Core crosslinked star (CCS) polymers ae synthesized and blended with linear polymers. Constrained mobility is revealed by an increase in modulus and strength with CCS polymer concentration, while creep deformation decreases and permanent strain increases. Storage modulus, loss modulus, and glass transition temperature increase with CCS polymer concentration due to miscibility and linear‐CCS polymer “arm” interactions. Master curves shift to lower frequencies with blends that experience segmental relaxation across a broader time scale due to a range of molecular environments from linear to maximum constraints in the vicinity of the crosslinked cores. Fragility and apparent activation energy increase with CCS polymer content, while fractional free volume and volume expansion decrease. magnified image

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