杜仲胶/聚乳酸形状记忆热塑性硫化胶的制备及性能

将生物基高分子材料杜仲胶（EUG）和聚乳酸（PLA）通过动态硫化技术制备了具有形状记忆性能的热塑性硫化胶（EUG/PLA TPV）。通过扫描电子显微镜、差示扫描量热、动态力学和力学性能测试及热机械循环分析等手段分别考察了EUG/PLA TPV的微观形貌、相容性、热性能、动态力学和力学性能及形状记忆性能。结果表明，增容剂腰果酚有效改善了EUG相与PLA相之间的相容性，从而提高了EUG/PLA TPV的力学性能。当橡塑质量比为5/5时，拉伸强度为10.5 MPa，扯断伸长率达到286%，是纯PLA的约48倍。EUG/PLA TPV具备特殊的双连续相结构，可以赋予其良好的形状记忆性能，形状固定率最高达到93%左右，形状回复率最高达到98%左右。

Preparation and properties of Eucommia ulmoides gum/polylactic acid shape memory thermoplastic vulcanizates

Bio-based Eucommia ulmoides gum (EUG) and polylactic acid (PLA) were used to prepare thermoplastic vulcanizates (EUG/PLA TPV) with shape memory property by dynamic vulcanization technology. The micromorphology, compatibility, thermal properties, dynamic mechanical properties, mechanical properties and shape memory property of EUG/PLA TPV were investigated by means of scanning electron microscopy, differential scanning calorimetry, dynamic mechanical properties and mechanical properties testing and thermo-mechanical cycle analysis. The results showed that the compatibilizer cardanol improved effectively the compati-bility between EUG phase and PLA phase, thereby improving the mechanical properties of EUG/PLA TPV. When the mass ratio of rubber to plastic was 5/5, the tensile strength was 10.5 MPa, and the elongation at break reached a maximum of 286%, which was 48 times that of pure PLA. EUG/PLA TPV had a special bicontinuous phase structure, which could endow itself with good shape memory property. The maximum shape fixed rate and shape recovered rate were 93% and 98%, respectively.