通过构建基于双马来酰亚胺和环氧树脂的交联网络开发具有高耐热性和强度的可再加工形状记忆热固性树脂,Journal of Applied Polymer Science

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通过构建基于双马来酰亚胺和环氧树脂的交联网络开发具有高耐热性和强度的可再加工形状记忆热固性树脂
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-01-30 , DOI: 10.1002/app.53685
Ying Li ₁ , Li Yuan ₁ , Guozheng Liang ₁ , Aijuan Gu ₁

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很难赋予可再加工的形状记忆热固性树脂优异的耐热性和高机械强度。在此，通过构建基于N , N' -4,4'-二苯基甲烷双马来酰亚胺 (BDM)、双酚 A 环氧树脂和 4,4'-二硫代二苯胺的交联网络，开发了一种新型可再加工形状记忆热固性树脂 (DBE) . 研究了DBE树脂的组成对其结构和综合性能的影响。结果表明 DBE 树脂具有多相结构。随着 DBE 树脂中 BDM 含量的增加，玻璃化转变温度 ( T _g),初始热分解温度和弯曲模量升高,冲击强度和再加工效率降低,而弯曲和拉伸强度先升高后降低。0.8DBE不可再加工，而2DBE、1.5DBE和1DBE可再加工，同时具有良好的形状重构和形状记忆性能。其中，1DBE综合性能最佳，具有诱人的高Tg（210℃）、高拉伸强度（76±3.2MPa）、良好的再加工性和优异的形状记忆性能，其形状固定率和形状恢复率均达到₁₀₀ %和99.6%，克服了现有可再加工形状记忆热固性树脂耐热性低、机械强度不足的瓶颈问题。

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Developing Reprocessable shape memory thermosetting resins with high thermal resistance and strength through building a crosslinked network based on bismaleimide and epoxy resins

It is difficult to endow reprocessable shape memory thermosetting resins with outstanding heat resistance and high mechanical strength. Herein, a new kind of reprocessable shape memory thermosetting resins (DBE) are developed through building a crosslinked network based on N,N′-4,4′-diphenylmethane bismaleimide (BDM), bisphenol A epoxy resin and 4,4′-dithiodiphenylamine. The influence of the composition of DBE resins on their structure and comprehensive properties was studied. Results show that DBE resins have multiple phase structures. With the increase of BDM content of DBE resin, the glass transition temperature (T_g), initial thermal decomposition temperature and flexural modulus increase, the impact strength and reprocessing efficiency decrease, while the flexural and tensile strengths increase initially and then decrease. 0.8DBE cannot be reprocessed, while 2DBE, 1.5DBE and 1DBE are reprocessable, and also have good shape reconfiguration and shape memory performances. Among them, 1DBE has the best integrated performance, which has attractively high T_g (210°C), high tensile strength (76 ± 3.2 MPa), good reprocessability and excellent shape memory performance, its shape fixation rate and shape recovery rate reach 100% and 99.6%, respectively, overcoming the bottleneck problems of low heat resistance and insufficient mechanical strength of existing reprocessable shape memory thermosetting resins.

更新日期：2023-01-30

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