Synthesis, degradation Behavior, and recyclability property of novel bio-based Polyimine thermosets

IF 5.8 2区化学 Q1 POLYMER SCIENCE

European Polymer Journal Pub Date : 2024-09-03 DOI:10.1016/j.eurpolymj.2024.113430

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Abstract

Given the challenges in recycling, degradation, flammability and environmental protection of most petroleum-based thermosets, it is of great significance to develop degradable, recyclable, and flame-retardant thermosets from renewable feedstocks for material safety and promote sustainable development. Herein, novel Polyimine thermosets (PIts) were prepared from renewable vanillin and their degradation behavior and recyclability properties were systematically investigated. The prepared PIts exhibited excellent thermal properties (T_g: 91–158 °C and T_5% above 250 °C), degradability and high monomer recovery rates (above 80 %). Meanwhile, the PIts demonstrated outstanding flame retardancy with a UL-94 V-0 rating achieved by forming noncombustible gas, phosphorus-containing species and nitrogen-containing hexatomic rings. Additionally, these PIts displayed high malleability with E_a ranging from 77.0-118.8 kJ.mol⁻¹ and could be recycled via hot pressing without altering their chemical structure and original mechanical properties. This work presents a new strategy for fabricating bio-based advanced thermosets from renewable resources.

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新型生物基聚酰亚胺热固性塑料的合成、降解行为和可回收性

鉴于大多数石油基热固性塑料在回收、降解、易燃性和环保方面面临的挑战，从可再生原料中开发可降解、可回收和阻燃的热固性塑料对材料安全和促进可持续发展具有重要意义。本文以可再生香兰素为原料制备了新型聚亚胺热固性塑料（PIts），并对其降解行为和可回收性进行了系统研究。所制备的聚酰亚胺热固性塑料具有优异的热性能（Tg：91-158 °C，250 °C以上T5%）、降解性和高单体回收率（80%以上）。同时，通过形成不可燃气体、含磷物种和含氮六原子环，这些 PIts 还具有出色的阻燃性，达到了 UL-94 V-0 级。此外，这些 PIts 还具有很高的延展性（Ea 值范围为 77.0-118.8 kJ.mol-1），并可通过热压进行回收，而不会改变其化学结构和原有的机械性能。这项工作为利用可再生资源制造生物基高级热固性塑料提供了一种新策略。

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来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.

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