Recent environmental issues, such as global warming and climate change, have prompted a shift from petroleum-derived polymers to biomass polymers. We have developed new lignin-derived biomass polymers based on 2-pyrone-4,6-dicarboxylic acid (PDC), a metabolic intermediate of lignin. In previous studies, various polymers have been synthesized using PDC. Many of them showed strong adhesion to metal surfaces and biodegradability. On the other hand, despite the quasi-aromatic ring structure of PDC, its heat resistance remained unresolved. In this study, a diallyl PDC derivative was synthesized and copolymerized with polydimethylsiloxane (PDMS) by Pt-catalyzed hydrosilylation. The resulting polymers were further cross-linked using the PDC ring as the cross-linking point by using thiol–ene click chemistry. It was found that the heat resistance of PDMS was significantly improved by polymerization and cross-linking. By using biomass-based PDC, silicone rubber with low environmental impact, excellent heat resistance, and mechanical strength was successfully developed.

中文翻译：

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通过共聚和 2-吡喃酮-4,6-二羧酸部分的巯基-烯交联改善聚二甲基硅氧烷的热性能


最近的环境问题，如全球变暖和气候变化，促使人们从石油衍生聚合物转向生物质聚合物。我们开发了基于 2-吡喃酮-4,6-二羧酸 （PDC） 的新型木质素衍生生物质聚合物，PDC 是木质素的代谢中间体。在以前的研究中，已经使用 PDC 合成了各种聚合物。其中许多表现出对金属表面的强烈粘附性和生物降解性。另一方面，尽管 PDC 具有准芳香环结构，但其耐热性仍未解决。在本研究中，合成了二烯丙基 PDC 衍生物，并通过 Pt 催化的氢化硅烷化与聚二甲基硅氧烷 （PDMS） 共聚。通过使用巯基-烯点击化学，使用 PDC 环作为交联点，将所得聚合物进一步交联。研究发现，聚合和交联显著提高了 PDMS 的耐热性。通过使用生物质基 PDC，成功开发出对环境影响小、耐热性和机械强度优异的硅橡胶。