Citation: Shu-ying Gu, Xie-feng Gao, Sheng-peng Jin, Liu Yan-liang. Biodegradable Shape Memory Polyurethanes with Controllable Trigger Temperature[J]. Chinese Journal of Polymer Science, ;2016, 34(6): 720-729. doi: 10.1007/s10118-016-1795-3 shu

Biodegradable Shape Memory Polyurethanes with Controllable Trigger Temperature

^aSchool of Materials Science and Engineering, Tongji University, Shanghai 201804, China
^b Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Shanghai 201804, China

Corresponding author: Shu-ying Gu, gushuying@mail.tongji.edu.cn
Received Date: 3 December 2015
Revised Date: 19 December 2015
Accepted Date: 22 December 2015

Fund Project: the National Key Technology R&D Program No. 2012BAI17B05

A series of random copolymers (PCLAs) were synthesized by ring-opening polymerization of D,L-lactide (LA) and ε-caprolactone (CL) with different molar ratios. PCLA based polyurethanes (PCLAUs) were obtained by chain-extending of PCLA and polytetramethylene ether (PTMEG) with hexamethylene diisocyanate (HDI). All the PCLAUs exhibit good shape memory properties with high shape fixity ratios above 98% and shape recovery ratios above 82% in the first cycle and 91% in the second cycle. PCLAUs with less CL content show faster recovery speed and PCLAUs with more CL content show higher shape recovery ratio. The trigger temperature can be tuned or controlled around body temperature by adjusting the molar ratio of LA to CL. The PCLAUs have potential applications in implant biomedical devices, especially for minimally invasive deployable devices.
- Shape memory,
- Polyurethane,
- Trigger temperature,
- Biodegradable
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