## Abstract A new concept to build shape memory polymers (SMP) combining outstanding fixity and recovery ratios (both above 99% after only one training cycle) typical of chemically crosslinked SMPs with reprocessability restricted to physically crosslinked SMPs is demonstrated by covalently bonding
Shape-memory effects of radiation crosslinked poly(ϵ-caprolactone)
✍ Scribed by G. Zhu; G. Liang; Q. Xu; Q. Yu
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 112 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0021-8995
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Polycaprolactone (PCL) was gamma-irradiated at different phases such as solid state at 30 to 55ЊC, molten state, and supercooled state, under vacuum or air atmosphere, to elucidate its crosslinking behavior. Irradiation in the molten state (80ЊC) gave higher gel content compared to room temperature.
## Abstract Biodegradable and photocurable block copolymers of __ε__‐caprolactone and L‐lactide were synthesized by polycondensation of PLLA diol ($\overline {M} \_{{\rm n}} $ = 10 000 g · mol^−1^), PCL diol ($\overline {M} \_{{\rm n}} $ = 10 000 g · mol^−1^), and a chain extender bearing a coumari