潜伏性热固性树脂固化反应控制及其应用的研究

发布时间：2018-08-07 10:03

【摘要】：潜伏性固化体系广泛应用于涂料、胶黏剂和复合材料等工业领域。目前,大多数商用潜伏性商业潜伏性固化产品使用颗粒固化剂或具有被封端的活性基团的液体化合物,导致缺乏流动性或固化反应缓慢。本文描述了一种利用化学平衡反应建立液体潜伏性固化体系的新概念。FT-IR光谱测试和流变学实验表明苯并VA嗪和胺可在溶液中形成反应平衡,在低温下使反应体系长期稳定,体系粘度基本不变。高温时反应平衡被打破,形成聚合物网络,反应体系快速固化为热固性树脂。此外,拉伸试验、DMA以及TGA等结果表明该固化产物机械强度高,热稳定好,具有较好的实用价值。石油化工的发展加剧了石油资源消耗和废弃物污染,使用可再生资源代替或部分代替石油原料,成为可持续发展的重要命题。本文进一步用环氧大豆油代替环氧树脂配制潜伏性固化体系,并利用废弃棉衣和废旧报纸作为填料通过热压成型法制备复合材料并表征其材料性能。结果发现当环氧树脂和环氧大豆油的环氧基摩尔比为3:1时,可获得机械强度高、热稳定性好、基质和填料之间无相分离的环境友好复合材料。本文首次提出基于反应平衡建立潜伏固化体系的新概念,并验证了其可行性及可用性,并制备环境友好型复合材料,研究成果对环境保护、废旧物品重新利用和减少能源消耗具有重要意义。
[Abstract]:Latent curing systems are widely used in coatings, adhesives and composites. At present, most commercial latent commercial solidification products use particle curing agents or liquid compounds with capped active groups, resulting in lack of fluidity or slow curing reaction. This paper describes a new concept of establishing liquid latent curing system by chemical equilibrium reaction. FT-IR spectra and rheological experiments show that Benzovasin and amine can form reaction equilibrium in solution and make the reaction system stable for a long time at low temperature. The viscosity of the system is basically unchanged. The reaction equilibrium was broken at high temperature and the polymer network was formed. The reaction system was rapidly solidified into thermosetting resin. In addition, the results of tensile test and TGA show that the solidified product has high mechanical strength, good thermal stability and good practical value. The development of petrochemical industry intensifies the consumption of petroleum resources and the pollution of wastes. It is an important proposition of sustainable development to replace or partially replace petroleum raw materials with renewable resources. In this paper, the latent curing system was prepared with epoxy soybean oil instead of epoxy resin. The composite materials were prepared by hot pressing molding with waste cotton clothes and waste newspapers as fillers and their properties were characterized. The results showed that when the molar ratio of epoxy resin to epoxy soybean oil was 3:1, environmentally friendly composites with high mechanical strength, good thermal stability and no phase separation between matrix and filler could be obtained. In this paper, a new concept of latent curing system based on reaction equilibrium is proposed for the first time, and its feasibility and availability are verified, and environment-friendly composites are prepared. It is of great significance to reuse and reduce energy consumption.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ323

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