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氰酸酯树脂的改性研究 总被引:2,自引:0,他引:2
本文介绍了目前氰酸酯(CE)树脂的几种改性方法,包括热固性树脂、热塑性树脂、橡胶弹性体、晶须及含不饱和双键的化合物等改性方法,其中主要阐述了环氧树脂(EP)和双马来酰亚胺树脂(BMI)改性氰酸酯树脂(CE)的反应机理及共聚体系的性能,指出了上述各种增韧改性方法的优缺点,并展望了了氰酸酯树脂的研究发展前景。 相似文献
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新型的单官能团氰酸酯改性氰酸酯树脂的研究 总被引:1,自引:0,他引:1
本文制备了新型的腰果酚型氰酸酯单体(CNSLCY),并用红外和质谱进行表征,研究了双酚A型氰酸酯(BADCY)/CNSLCY树脂改性体系.通过研究CNSLCY改性BADCY树脂性能发现,CNSLCY的引入可以提高BADCY的韧性、介电性能和耐吸水性能,而对其热性能降低则影响不大. 相似文献
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氰酸酯树脂增韧改性研究 总被引:2,自引:0,他引:2
综述了采用热固性树脂(环氧树脂,双马来酰亚胺)、热塑性树脂(聚醚砜,聚苯醚)、橡胶弹性体(端羧基丁腈橡胶,端环氧基丁腈橡胶)、无机纳米粒子(SiO2,SiC)增韧改性氰酸酯树脂的机理及研究进展,并指出了今后氰酸酯树脂改性研究的发展方向。 相似文献
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改性氰酸酯树脂的研究进展 总被引:14,自引:2,他引:14
本文主要评述了目前氰酯酯树脂的几种改性途径,其中包括与热固性树脂、橡胶弹性体、热塑性塑料、含不饱和双键的化合物以及与不同结构的氰酸酯树脂单体共聚或共混等改性方面,同时,本文还讨论了改性氰酯酯树脂的发展方向及应用前景。 相似文献
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阐述了目前热塑性树脂如聚醚酰亚胺、聚苯醚、聚砜和芳香聚酯类对氰酸酯树脂增韧的研究,分析了影响增韧效果的因素.结果表明,在使用热塑性树脂改性氰酸酯时,须综合考虑热塑性树脂对氰酸酯韧性、耐热性和工艺性能的影响,以获得综合性能相对较佳的体系. 相似文献
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Liquid crystalline epoxy resin (LCE) modify cyanate ester/epoxy resin blend systems were studied by scanning electron microscope, polarizing optical microscope, thermogravimetric analyzer, differential scanning calorimetry, thermal mechanical analysis, and rheometers. With the addition of LCE resin, the blends showed both an enhanced curing rate and increased glass transition temperature of cured samples. The phase structures of the blends changed from homogenous to liquid crystalline phase when the content of LCE was increased. At the same time, the mechanical properties were also improved and thermal expansion coefficients were lowed down. The thermal degradation temperatures showed little differences, while the residue char yields were slightly increased with the addition of LCE. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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综述了采用环氧树脂(EP)增韧改性氰酸酯(CE)树脂的共聚反应机理、固化产物的性能和复合材料的性能。CE在水分或残留的酚及金属离子等作用下自聚生成三嗪环,接着与EP反应生成口恶唑烷酮。CE改性后树脂的韧性和弯曲强度提高,而玻璃化温度和耐热性下降很少,且固化产物耐湿热性能和介电性能基本维持不变。 相似文献
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Soluble polyimides (PIs) were prepared as random or multiblock types with 4,4′‐(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 3,3′,4,4′‐biphenyltetracarboxylic dianhydride (s‐BPDA) as acid dianhydride components and 4,4′‐bis(m‐aminophenoxy) diphenyl sulfone (m‐BAPS) as a diamine component by a one‐pot process and used to improve the brittleness of the cyanate ester resin. Random‐type PIs were more effective as modifiers than multiblock‐type PIs. The morphologies of the modified resins depended on PI structure, molecular weight, and concentration. The most effective modification of the cyanate ester resin was attained because of a heterogeneous phase structure composed of a flat matrix phase and phase‐inverted structures of the modified resin; a 15 wt % inclusion of a random PI (weight‐average molecular weight = 63,400) composed of 6FDA, s‐BPDA, and m‐BAPS (0.5/0.5/1.0 molar ratio) led to a 65% increase in the fracture toughness for the modified resin with a slight loss of flexural strength and a retention of flexural modulus and glass‐transition temperature, compared with the values for the unmodified resin. Water absorptivity of the modified resin was comparable to that of the unmodified resin up to 400 h, and then, water absorption of the modified resins increased considerably. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1–11, 2003 相似文献
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Soluble polyarylates were prepared from the reaction of 2,2‐bis(4‐hydroxyphenyl)propane (bisphenol‐A) and aromatic acid dichlorides (phthaloyl chloride and related diacid dichlorides), and used to improve the brittleness of a cyanate ester resin. The polyarylates include poly[2,2‐di(4‐phenylene)propane phthalate] (PPA), poly[2,2‐di(4‐phenylene)propane phthalate‐co‐2,2‐di(4‐phenylene)propane isophthalate] (IPPA) and poly[2,2‐di(4‐phenylene)propane phthalate‐co‐2,2‐di(4‐phenylene)propane terephthalate] (TPPA). Furthermore, a commercial polyarylate, U‐polymer, was also used as a modifier. The morphologies of the modified resins depended on the polyarylate structure and concentration. The most effective modification of the cyanate ester resin could be attained because of the co‐continuous phase structure of the modified resin: 25 wt% inclusion of IPPA (50 mol% isophthalate units, weight average molecular weight (Mw) 38 500 g mol?1) led to a 130% increase in the fracture toughness (KIC) for the modified resin, with retention of its flexural properties and glass transition temperature, as compared with the values for the unmodified resin. Water absorptivity of the IPPA‐modified resin was smaller than that of the unmodified resin. Copyright © 2003 Society of Chemical Industry 相似文献