共查询到19条相似文献,搜索用时 445 毫秒
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环氧树脂增韧改性方法研究进展 总被引:9,自引:0,他引:9
概述了环氧树脂的特性和环氧树脂增韧改性的主要途径,分别介绍了热塑性树脂增韧改性环氧树脂、核-壳结构增韧改性、膨胀性单体增韧改性、刚性粒子增韧改性、无机纳米粒子增韧改性、液晶聚合物增韧改性、液体橡胶增韧改性等方法.重点对液体橡胶增韧改性进行了讨论,同时分析了目前环氧树脂增韧改性技术存在的问题及发展趋势. 相似文献
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综述了国内外环氧树脂增韧改性的研究进展。介绍了橡胶类弹性体、热塑性树脂、纳米粒子、液晶聚合物、超支化聚合物、互穿网络结构和柔性链段等增韧改性环氧树脂的研究现状,讨论了单一增韧方法对环氧树脂综合性能的影响及存在的缺陷,展望了未来多种增韧方法协同增韧改性环氧树脂的发展趋势。 相似文献
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环氧树脂的增韧改性研究 总被引:12,自引:0,他引:12
综述了环氧树脂的增韧改性技术,着重讨论了橡胶弹性体、热塑性树脂增韧环氧树脂的增韧机理和发展现状,并简要介绍了热致液晶聚合物、柔性链段固化剂和互穿网络结构等环氧树脂增韧改性新技术. 相似文献
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环氧树脂增韧改性技术研究进展和新方法及其机理 总被引:2,自引:0,他引:2
简单介绍了环氧树脂技术的研究进展和近期的主要应用,并概述了环氧树脂的改性技术.主要介绍了增韧改性的一些新方法,包括热塑性树脂增韧、互穿网络增韧、热致性液晶增韧、原位聚合增韧、核壳结构聚合物增韧等,主要介绍了用橡胶弹性体、热塑性树脂、刚性粒子、核壳型结构聚合物来增韧环氧树脂,以及环氧树脂绝缘性、耐湿热性和阻燃性等的改进方法,并对其中的增韧机理作了总结分析.最后本文综述了环氧树脂增韧改性技术发展及其未来展望. 相似文献
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包膜增韧硅微粉对环氧树脂增韧机理的研究 总被引:4,自引:0,他引:4
本文首次提出预先对硅微粉进行增韧处理来达到增韧环氧树脂的新思路,并根据断裂理论,采用循环脉冲载荷对增韧硅微粉/环氧树脂复合材料进行冲击性能试验。分析了微裂纹的形成与扩展,探讨增韧硅微粉对环氧树脂的增韧机理。 相似文献
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反应性端基聚丁二烯系列液体橡胶在环氧树脂改性增韧方面的应用 总被引:5,自引:0,他引:5
综述了含反应性端基聚丁二烯系列液体橡胶(以下简单PBLR)品种、性能及特点,概括比较了PBLR改性增韧环氧树脂方法及特点;分别列举了PBLR改性环氧树脂在微机电浇注料,树脂砂轮,水利机械涂敷,电子灌封及飞机粘合剂等方面的应用。 相似文献
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聚醚砜增韧环氧树脂的结构与性能 总被引:7,自引:0,他引:7
本文研究了聚醚砜(PES)增韧环氧树脂的微观结构和热-力学性能,分析了PES在环氧树脂基体中的增韧机理。PES增韧环氧树脂体系为两相结构,分散相PES呈不规则的变形颗粒分散在环氧树脂中。加入一定量PES可较大幅度地提高环氧树脂的韧性,而不降低环氧树脂的模量和耐热性。这种增韧作用是由PES与环氧树脂在固化过程中形成半互穿网络和压力下分散的PES微粒的变形所引起的。 相似文献
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Wu Bin Ying Da Som Moon Min Woo Lee Na Yeong Ko Nho Hoon Kwak Bumjae Lee Jin Zhu Ruoyu Zhang 《应用聚合物科学杂志》2018,135(5)
To simultaneously improve the fracture toughness and heat resistance of a cured toughened epoxy resin along with a reduction in its viscosity during the mixing process, two novel polysulfone‐type polymers are synthesized via azide–alkyne polymerization for use as toughening agents. The epoxy resin toughened with these polymers by in situ azide–alkyne polymerization during the cure process, which shows excellent processibility and based on the significantly lower viscosity (61 and 62 cP) during epoxy mixing process than that of commonly commercial polyethersulfone (PES, 127,612 cP). The novel polysulfone‐type polymer toughened epoxy resin showed the advantage in excellent fracture toughness than the PES toughened epoxy. In addition, the glass transition temperature of the novel polysulfone‐type polymer toughened epoxy resin is similar to that of the neat one (~230 °C) and does not decrease, which implies excellent heat resistance of the toughened epoxy. These phenomena can be attributed to the formation of semi‐interpenetrating polymer networks comprising the epoxy network and the linear polysulfone‐type polymers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45790. 相似文献
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Unsaturated polyester‐toughened epoxy composites: Effect of sisal fiber on thermal and dynamic mechanical properties 下载免费PDF全文
In the present study, the mechanical and thermal properties of sisal fiber‐reinforced unsaturated polyester (UP)‐toughened epoxy composites were investigated. The sisal fibers were chemically treated with alkali (NaOH) and silane solutions in order to improve the interfacial interaction between fibers and matrix. The chemical composition of resins and fibers was identified by using Fourier‐transform infrared spectroscopy. The UP‐toughened epoxy blends were obtained by mixing UP (5, 10, and 15 wt%) into the epoxy resin. The fiber‐reinforced composites were prepared by incorporating sisal fibers (10, 20, and 30 wt%) within the optimized UP‐toughened epoxy blend. Scanning electron microscopy was used to analyze the morphological changes of the fibers and the adhesion between the fibers and the UP‐toughened epoxy system. The results showed that the tensile and flexural strength of (alkali‐silane)‐treated fiber (30 wt%) ‐reinforced composites increased by 83% and 55%, respectively, as compared with that of UP‐toughened epoxy blend. Moreover, thermogravimetric analysis revealed that the (alkali‐silane)‐treated fiber and its composite exhibited higher thermal stability than the untreated and alkali‐treated fiber systems. An increase in storage modulus and glass transition temperature was observed for the UP‐toughened epoxy matrix on reinforcement with treated fibers. The water uptake behavior of both alkali and alkali‐silane‐treated fiber‐reinforced composites is found to be less as compared with the untreated fiber‐reinforced composite. J. VINYL ADDIT. TECHNOL., 23:188–199, 2017. © 2015 Society of Plastics Engineers 相似文献