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PCL–PLLA Semi‐IPN Shape Memory Polymers (SMPs): Degradation and Mechanical Properties
Author(s) -
Woodard Lindsay N.,
Page Vanessa M.,
Kmetz Kevin T.,
Grunlan Melissa A.
Publication year - 2016
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600414
Subject(s) - materials science , shape memory polymer , polymer , degradation (telecommunications) , crystallization , thermoplastic , composite material , thermoplastic polymer , interpenetrating polymer network , chemical engineering , polymer chemistry , computer science , telecommunications , engineering
Thermoresponsive shape memory polymers (SMPs) based on poly(ε‐caprolactone) (PCL) whose shape may be actuated by a transition temperature ( T trans ) have shown utility for a variety of biomedical applications. Important to their utility is the ability to modulate mechanical and degradation properties. Thus, in this work, SMPs are formed as semi‐interpenetrating networks (semi‐IPNs) comprised of a cross‐linked PCL diacrylate (PCL‐DA) network and thermoplastic poly( l ‐lactic acid) (PLLA). The semi‐IPN uniquely allows for requisite crystallization of both PCL and PLLA. The influence of PLLA (PCL:PLLA wt% ratio) and PCL‐DA molecular weight ( n ) on film properties are investigated. PCL–PLLA semi‐IPNs are able to achieve enhanced mechanical properties and accelerated rates of degradation.