Improved thermal properties of polydimethylsiloxane by copolymerization and thiol–ene crosslinking of 2-pyrone-4,6-dicarboxylic acid moiety

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Chemistry Pub Date : 2024-11-25 DOI:10.1039/d4py01051e

Takahiro Shimura, Yijie Jin, Keiichi Kubyama, Takuma Araki, Naofumi Kamimura, Eiji Masai, Masaya Nakamura, Tsuyoshi Michinobu

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Abstract

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.

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通过 2-吡喃酮-4,6-二羧酸分子的共聚和硫醇-烯交联改善聚二甲基硅氧烷的热性能

全球变暖和气候变化等近期环境问题促使人们从石油衍生聚合物转向生物质聚合物。我们以木质素的代谢中间体 2-吡喃酮-4,6-二羧酸（PDC）为基础，开发了新型木质素衍生生物质聚合物。在之前的研究中，已经利用 PDC 合成了多种聚合物。其中许多聚合物对金属表面具有很强的粘附性和生物降解性。另一方面，尽管 PDC 具有准芳香环结构，但其耐热性问题仍未得到解决。本研究合成了一种二烯丙基 PDC 衍生物，并通过铂催化氢硅烷化将其与聚二甲基硅氧烷（PDMS）共聚。以 PDC 环为交联点，利用硫醇-烯点击化学进一步交联得到聚合物。研究发现，通过聚合和交联，PDMS 的耐热性显著提高。通过使用生物质基 PDC，成功开发出了对环境影响小、耐热性和机械强度优异的硅橡胶。

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来源期刊

Polymer Chemistry POLYMER SCIENCE-

CiteScore

8.60

自引率

8.70%

发文量

535

审稿时长

1.7 months

期刊介绍： Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.