氰酸酯树脂改性研究进展

氰酸酯树脂(CE)具有优异的介电性能、较高的玻璃化转变温度和强度、良好的耐化学腐蚀性和耐热性等优点,然而其固化物脆性较大,并且其韧性常常不能满足使用要求。从提高CE韧性角度,介绍了各种CE的改性方法(包括橡胶弹性体改性、热固性树脂改性、热塑性树脂改性和互穿聚合物网络改性等)及其应用研究进展。针对改性过程中存在的问题,提出了CE改性的未来发展方向。     

氰酸酯树脂的改性研究

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。     

氰酸酯树脂的增韧改性研究进展

评述了氰酸酯树脂增韧的各种方法，包括热固性添加剂增韧、热塑性添加剂增韧、橡胶增韧和纳米粒子增韧等。比较了各种增韧体系的增韧机理和增韧效果。     

新型的单官能团氰酸酯改性氰酸酯树脂的研究

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.     

氰酸酯树脂改性的研究进展

简要介绍了氰酸酯的缺陷,并综述了用各种方法对氰酸酯树脂改性的研究进展,包括热固性树脂改性(环氧树脂改性和双马来酰亚胺树脂改性)、热塑性树脂改性、橡胶弹性体改性、互穿网络聚合物改性以及物理改性法。     

氰酸酯树脂增韧改性研究

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。     

氰酸酯树脂改性及应用概况

综述氰酸酯树脂(CE)的种类及热固性树脂、热塑性树脂、橡胶弹性体、含不饱和双键化合物等对CE树脂的改性。改性后的CE具有低的介电常数和介质损耗角正切、高的耐热性、优良的尺寸稳定性、低的吸湿率和良好的工艺性能等诸多优异特性，因而在高性能印刷电路板、宇航结构部件、隐身材料、雷达罩、人造卫星等领域获得了广泛的应用，进而指出了CE的发展方向。     

改性氰酸酯树脂的研究进展

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。     

热塑性树脂增韧氰酸酯树脂的研究进展

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.     

氰酸酯树脂增韧改性研究

主要评述了目前氰酸酯树脂的几种增韧改性途径,其中包括与热固性树脂(EP、BMI、BMI/EP/CE)、热塑性塑料(PSU、PEI)、橡胶弹性体、含不饱和双键的化合物以及纳米粒子的插层增韧改性。同时,还讨论了改性氰酸酯树脂的发展方向及应用前景。     

双马来酰亚胺改性氰酸酯的研究进展

双马来酰亚胺树脂(BMI)具有优异的耐热性、电绝缘性、透波性、耐辐射性和阻燃性,并且其力学性能和尺寸稳定性良好;而氰酸酯树脂(CE)具有优异的介电性能。采用BMI改性CE,可实现树脂性能的最佳结合,故对近年来BMI改性CE的研究进展进行了综述。     

氰酸酯树脂增韧改性研究进展

主要介绍了氰酸酯(CE)树脂的增韧机制,综合分析了国内外CE树脂的增韧改性研究成果(包括热固性树脂改性CE、热塑性树脂改性CE、橡胶弹性体改性CE和纳米无机材料改性CE等),并对CE树脂的发展前景进行了展望。     

Liquid crystalline epoxy resin modified cyanate ester/epoxy resin systems

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     

双马来酰亚胺/氰酸酯共固化树脂的研究进展

介绍了双马来酰亚胺/氰酸酯(BMI/CE)树脂的固化机制及其应用范围,特别综述了BMI/CE树脂的改性研究(如新型结构树脂单体改性、环氧树脂改性、烯丙基化合物改性和聚苯醚改性等)。最后对BMI/CE树脂今后的研究与发展方向进行了展望。     

环氧树脂改性氰酸酯树脂的研究进展

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。     

Modification of cyanate ester resin by soluble polyimides

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     

Modification of cyanate ester resin by soluble polyarylates

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 (M_w) 38 500 g mol^?1) led to a 130% increase in the fracture toughness (K_IC) 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