The purpose of this study is to develop mechanically robust soybean oil and polycaprolactone (PC)-based drug-eluting shape memory polymers (SMPs) containing polyrotaxane (PRX) cross-linkers. Essentially, the dynamic PRX cross-linker-containing methacrylate group is introduced to increase the cross-linking density and flexibility of the SMP to overcome its mechanical limitations. It was confirmed that the elongation and cross-linking density of the PRX-incorporated SMP were increased by 2–4 times compared to neat SMP. In addition, those high mechanical properties of the PRX-incorporated SMP could be maintained after the degradation of the PC by the drug-eluting process.

中文翻译：

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通过掺入超分子交联剂提高药物洗脱形状记忆聚合物的机械强度、柔韧性和形状恢复率

本研究的目的是开发含有聚轮烷 (PRX) 交联剂的机械稳健大豆油和聚己内酯 (PC) 基药物洗脱形状记忆聚合物 (SMP)。本质上，引入了动态 PRX 交联剂甲基丙烯酸酯基团以增加 SMP 的交联密度和柔韧性，从而克服其机械限制。经证实，与纯 SMP 相比，掺入 PRX 的 SMP 的伸长率和交联密度增加了 2-4 倍。此外，在 PC 被药物洗脱过程降解后，结合 PRX 的 SMP 的那些高机械性能可以保持。