可持续来源的希夫碱玻璃环氧树脂网络具有内在的阻燃性，可降解性和形状记忆能力

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-10-01 DOI:10.1016/j.polymdegradstab.2025.111708

Haoxin Niu , Haojie Shi , Yu Li , Hao-Ran Jiang , Xin Wang , Yuan Hu

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引用次数: 0

摘要

三维交联网络赋予环氧热固性材料优异的应用性能，使环氧热固性材料在材料领域不可或缺。它也使环氧热固性树脂不溶和不混溶。此外，环氧热固性树脂主要来源于不可再生的化石资源，造成了环境危机。此外，环氧热固性材料是易燃的，具有严重的火灾危险。为了解决这些问题，本文以对羟基苯甲醛、香兰素和丁香醛为原料制备了3种希夫碱固化剂。采用三种结构不同的固化剂制备了含动态亚胺键的环氧树脂。环氧玻璃体表现出优异的力学性能。在交联网络中加入希夫碱结构，大大提高了环氧树脂的防火安全性。环氧玻璃体具有良好的耐化学性，可在盐酸丙酮溶液中选择性降解。此外，环氧玻璃体还表现出优异的形状记忆性能和显著的应力松弛。本研究为本征阻燃型生物基环氧树脂的制备提供了新思路，并创新性地研究了甲氧基对环氧树脂性能的影响。

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Sustainably sourced Schiff base vitrimeric epoxy networks with intrinsic flame retardancy, degradability and shape-memory capabilities

The three-dimensional cross-linking network endows epoxy thermosets with outstanding application performance, rendering epoxy thermosets indispensable in the field of materials. It also makes epoxy thermosets insoluble and immiscible. Moreover, epoxy thermosets are derived mainly from non-renewable fossil resources, causing an environmental crisis. In addition, epoxy thermosets are flammable and pose a significant fire hazard. To address these problems, three Schiff base curing agents were prepared in this work by utilizing p-hydroxybenzaldehyde, vanillin and syringaldehyde. Three structurally distinct curing agents were utilized to prepare epoxy vitrimers incorporating dynamic imine bonds. The epoxy vitrimers exhibited outstanding mechanical properties. The incorporation of the Schiff base structure into the cross-linking network greatly enhanced the fire safety of the epoxy vitrimers. The epoxy vitrimers demonstrated excellent chemical resistance and could be selectively degraded in an acetone solution of hydrochloric acid. In addition, the epoxy vitrimers demonstrated excellent shape memory properties and significant stress relaxation. This work provides a novel strategy for the preparation of intrinsically flame-retardant bio-based epoxy vitrimers and innovatively investigates the influence of methoxy groups on the properties of epoxy vitrimers.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.