羟基烷酸
化学
极限抗拉强度
热塑性弹性体
韧性
弹性体
单体
热稳定性
聚合
开环聚合
热塑性塑料
产量(工程)
反应性(心理学)
脱羧
复合材料
高分子化学
有机化学
催化作用
材料科学
聚合物
共聚物
病理
生物
医学
遗传学
替代医学
细菌
作者
Hao‐Yi Huang,Lei Yang,Siqi Wang,Yu‐Ting Huang,Yonghong Luo,Da‐Gang Yu,Zhongzheng Cai,Jian‐Bo Zhu
摘要
It remains a long-standing challenge for chemical recycling of polyhydroxyalkanoates (PHAs) to propiolactone-based monomers due to the high ring strain and many inevitable side reactions. In this contribution, a novel α-spiro-cyclohexyl-propiolactone (SHPL) has been designed with high reactivity toward ring-opening polymerization even at a catalyst loading of <1 ppm. The resulting poly(3-hydroxy-2-spiro-cyclohexylpropionate) (P3HSHP) exhibited high thermal stability with a Td of 364 °C and a high Tm of 272 °C. Meanwhile, it could be depolymerized back to SHPL in 86% yield without decarboxylation or elimination side products. Notably, SHPL could be exploited to construct high-performance thermoplastic elastomers (TPEs) via one-pot copolymerization with ε-caprolactone (CL). Particularly, the resulting gradient P(CL2000-grad-SHPL500) showcased an ultimate tensile strength of 58.8 ± 4.0 MPa, high stretchability of 1959 ± 53%, a record toughness of 600 MJ/m3, and high elastic recovery (>90%). This superior performance of SHPL could advance the development of new sustainable high-performance TPEs.
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