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利用热致型液晶化合物对环氧树脂进行增韧改性,固化体系既融合了液晶的有序性又保留了环氧树脂网络交联的特点,其韧性、冲击强度大幅度提高,而不降低耐热性,这是环氧树脂的传统增韧方法所无法比拟的,是实现环氧树脂高性能化的重要途径之一。热致型液晶高分子(TLCP)增韧环氧树脂可以归纳为两类:液晶环氧树脂(LCEP)增韧和其他聚合物液晶共混增韧。概述了LCEP增韧的方法和增韧机理,TLCP共混增韧的方法和增韧机理,综述了热致型液晶增韧环氧树脂的研究进展,并对其今后研究作了展望。 相似文献
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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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Vinyl ester resins (VERs) are often described as a cross between unsaturated polyester resins and epoxy resins. VERs offer an upgrade to epoxy resins, and they tend to be selected when chemical and temperature resistance is required. This research was aimed at developing the synthesis of unsaturated ester resins (UERs), which are similar to VERs. UERs were synthesized by the addition of dihydrodicyclopentadienyl hydrogen maleate to the terminal epoxy groups in low‐molecular‐weight bisphenol A/epichlorohydrin epoxy resins. The effect of urethanization of UERs on the properties of the crosslinked polymer was also investigated. As crosslinking monomers, styrene and glycol dimethacrylates were used. The following properties of cured UERs were determined: the heat deflection temperature, alkali resistance, and the mechanical strength. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2627–2631, 2006 相似文献
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