PCL–PLLA Semi‐IPN Shape Memory Polymers (SMPs): Degradation and Mechanical Properties

Abstract

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. image