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Mechanical properties of thermoplastic elastomers of poly(butylene terephthalate) and poly(ethylene glycol) in a bending deformation

✍ Scribed by Shuhong Wang; J. E. Mark; B. Erman; S. Fakirov

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 381 KB
Volume: 51
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1994.070510115

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✦ Synopsis

Thermoplastic elastomers based on poly (butylene terephthalate) (PBT) and poly (ethylene glycol) (PEG) were studied by bending-creep measurements. The dependence of the creep compliance on the composition of the block copolymer was determined, and the experimental results were compared with calculated results to obtain a better understanding of structureproperty relationships for this class of materials. The hard PBT domains in the rubbery PEG matrix make a large contribution to the mechanical strength and hardness, presumably serving as reinforcing fillers as well as cross-links. Relaxation effects were found to decrease significantly with increase in hard-segment content.

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