Journal
POLYMER DEGRADATION AND STABILITY
Volume 108, Issue -, Pages 195-200Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2014.06.015
Keywords
Hydrolytic degradation; Segmented thermoplastic polyurethane; Microphase separated structure; Hydrogen bonding; Hard segment
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Funding
- Grupos Consolidados [IT-776-13]
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The materials design focused on biomedical applications involves the analysis under physiological simulated conditions because it is of prime importance the determination of life-time and reliability of these materials. The goal of this work were the study of the biostability of a series of segmented thermoplastic polyurethane elastomers (STPUE), containing PTHF and PCL blocks as soft segment (SS), by means of hydrolytic degradation tests for 3 years to determine the useful life-time. Physico-chemical and thermal properties were analyzed from the viewpoint of microdomain structure. The results suggested a reorganization in hard and soft segment ordered structure by means of a greater number of hydrogen bonds which contributed to phase separation and hence low-water uptake, being less susceptible to hydrolytic attack. (C) 2014 Elsevier Ltd. All rights reserved.
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