苯并噁嗪改性二苯醚玻璃布层压板的制备及性能

本文介绍了一种改性二苯醚树脂的合成及其玻璃布层压板的制备方法,并对其性能进行了全面测试.实验结果表明,采用苯并噁嗪改性二苯醚树脂制备的玻璃布层压板,其工艺性优于苯酚改性二苯醚树脂,且成本较低.用作H级绝缘材料,市场前景广阔.     

苯并噁嗪改性二苯醚玻璃布层压板的制备及性能

本文介绍了一种改性二苯醚树脂的合成及其玻璃布层压板的制备方法,并对其性能进行了全面测试.实验结果表明,采用苯并噁嗪改性二苯醚树脂制备的玻璃布层压板,其工艺性优于苯酚改性二苯醚树脂,且成本较低.用作H级绝缘材料,市场前景广阔.     

环氧树脂改性双马来酰亚胺树脂玻璃布绝缘层压板的研制

用环氧树脂改性双马来酰亚胺树脂,改性后的树脂韧性好、耐高温,并具有优异的电绝缘性能。探索了改性树脂的合理固化工艺。制备了铺覆性能好、储存时间长、粘接性能优良的预浸玻璃布,由预浸玻璃布压制的层压板具有优异的力学电气性能。     

一种改性苯并恶嗪玻璃布层压板的制造方法

本发明公开了一种新型改性苯并恶嗪玻璃布层压板的制造方法,包括改性苯并恶嗪树脂制备、胶液配制和浸胶、烘焙及压制步骤,在合成苯并恶嗪树脂过程中引入腰果酚,以替代部分苯酚;同时还包括一个双重交联固化的组合体系,即有机金属络合物催化固化体系加上过氧化物自由基引发热聚合交联体系的组合。本发明方法能使苯并恶嗪玻璃布层压板获得性能上的均衡,     

环氧树脂改性氰酸酯树脂玻璃布层压板的研制

用环氧树脂改性氰酸酯树脂,对改性树脂体系进行了IR、DSC、TGA分析,研究了树脂的浇铸体和玻璃布层压板的几项主要性能.     

高性能无卤阻燃环氧树脂玻璃布层压板的研制

采用含阻燃剂DOPO反应型环氧树脂对原环氧树脂进行改性,并研究了高力学性能玻璃布对层压板性能的影响。结果表明:阻燃剂DOPO型环氧树脂能显著提高层压板的阻燃性能,当磷含量为1.5%时,环氧树脂玻璃布层压板阻燃等级达到UL 94-V0级;适量的加入高力学性能玻璃布,可以提高层压板的力学性能;制备的环氧树脂玻璃布层压板综合性能优异。     

苯并恶嗪—环氧树脂基玻璃布层压板的研究

采用低分子量可溶性酚醛树脂路线合成了一种苯并恶嗪树脂溶液，与环氧树脂共混改性制得胶液，经浸渍玻璃布，烘焙，压制而得到了一种玻璃布层压板。该层压板的弯曲强度在常态下为567MPa，155℃时为296MPa，保持率为54％。采用热重点斜法（TPS）计算玻璃布层压板的耐热温度指数为178．98℃。测试结果表明，苯并恶嗪－环氧树脂基玻璃布层压板的力学性能、耐热性、电绝缘性、耐水及耐化学品腐蚀性等综合性能优于3240玻璃布层压板，成本更低。     

开环聚合酚醛树脂复合材料的研究──ALPF3-EGF层压板的研制

采用低分子量可溶性酚醛树脂合成了一种新型的苯并噁嗪中间体（ＡＬＰＦ３）树脂溶液,制备了高性能的玻璃布层压板。采用凝胶时间测定、差热分析和热重分析等方法研究了树脂的固化行为和热稳定性,确定了较为合理的玻璃布浸胶、烘焙和压制工艺,测试了玻璃布层压板的一般性能。结果表明,ＡＬＰＦ３树脂溶液及浸胶玻璃布贮存期长、工艺性好;玻璃布层压板性能优良,玻璃化转变温度达２８０℃,常态和１８０℃的弯曲强度为４６３ＭＰａ和３８０ＭＰａ,保留率达８２％。适用于１５５～１８０℃用的耐高温结构材料和电绝缘材料。     

苯并恶嗪/环氧树脂/咪唑体系的层压板性能研究

利用环氧树脂F-51对苯并恶嗪进行改性,同时加入咪唑调节工艺性,制备出一系列不同组分配比而凝胶化时间接近的树脂基体,并制得系列玻璃布层压板。通过检测层压板的力学性能、动态力学性能、吸水性和层压板断面状况,研究了在体系中加入咪唑调节工艺性的情况下,苯并恶嗪和环氧树脂的配比对其玻璃布层压板性能的影响。结果表明,基体树脂中苯并恶嗪,环氧树脂与咪唑的质量比为8∶2∶0.017时,层压板的玻璃化转变温度最高,达到232.7℃,3者的质量比为6∶4∶0.013时,综合力学性能最好,弯曲强度,拉伸强度与模量,冲击强度分别为729.3,291.7,2339.2MPa和233.8kJ/m2,但Tg较低(171.4℃)。环氧树脂和咪唑的加入对该体系玻璃布层压板力学性能和吸水性影响较小,而对其耐热性有较大的影响。     

新型耐高温阻燃层压板的研制

以苯酚、甲醛为原料,在催化剂的作用下合成酚醛树脂,然后用硼酸改性得到硼酚醛(FB)树脂.采用FB树脂作为基材树脂制作玻璃布层压板,FB树脂的耐热性比普通酚醛树脂高.FB树脂层压板具有好的耐热、阻燃、机械和电气性能,其阻燃性能达到了UL-94垂直燃烧法V-0级.     

Modification of epoxy resins with poly(aryl ether ketone)s

Poly(aryl ether ketone)s were used as modifiers for bisphenol-A diglycidyl ether epoxy resin (AER 331) cured with methyl hexahydrophthalic anhydride. Poly(phthaloyl diphenyl ether) (PPDE), soluble in the uncured epoxy resin without using solvents, was prepared by the Friedel-Crafts reaction of phthaloyl chloride and diphenyl ether. The mechanical, thermal, and dynamic viscoelastic properties of the modified resins with PPDE were examined and compared to the parent resin (AER 331). The fracture toughness, K_IC, for the modified resins increased at no expense to their mechanical and thermal properties on 10 wt % addition of PPDE with molecular weights of more than 17,000. The toughening mechanism is discussed based on the morphological and dynamic viscoelastic behaviors of the modified epoxy resin system.     

Modification of bismaleimide resin by poly(phthaloyl diphenyl ether) and the related copolymers

Poly(ether ketone ketone)s were prepared and used to improve the brittleness of the bismaleimide resin. The bismaleimide resin was composed of 4,4′-bismaleimidediphenyl methane (BMI) and o,o′-diallyl bisphenol A (DBA). Poly(ether ketone ketone)s include poly(phthaloyl diphenyl ether) (PPDE), poly(phthaloyl diphenyl ether-co-isophthaloyl diphenyl ether) (PPIDE), and poly(phthaloyl diphenyl ether-co-terephthaloyl diphenyl ether) (PPTDE). PPIDE (50 mol % isophthaloyl unit) was more effective as a modifier for the bismaleimide resin than were PPDE and PPTDE (50 mol % terephthaloyl unit). Morphologies of the modified resins changed from particulate to cocontinuous and to phase-inverted structures, depending on the modifier structure and content. The most effective modification for the cured resins could be attained because of the cocontinuous phase or phase-inverted structure of the modified resins. For example, when using 10 wt % of PPIDE (50 mol % IP unit, MW 349,000), the modified resin had a phase-inverted morphology and the fracture toughness (K_IC) for the modified resins increased 75% with retention in flexural properties and the glass transition temperature, compared to those of the unmodified cured bismaleimide resin. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:769–780, 1998     

Modification of three‐component bismaleimide resin by poly(phthaloyl diphenyl ether) and related copolymers

A three‐component bismaleimide resin, composed of 4,4′‐bismaleimidodiphenyl methane (BDM), o,o′‐diallyl bisphenol A (DBA), and o,o′‐dimethallyl bisphenol A (1.0/0.3/0.7 eq ratio) was used as a parent bismaleimide resin. Modification of the three‐component bismaleimide resin was examined by blending it with poly(ether ketone ketone)s. Poly(ether ketone ketone)s include poly(phthaloyl diphenyl ether) (PPDE), poly(phthaloyl diphenyl ether‐co‐isophthaloyl diphenyl ether) (PPIDE), and poly(phthaloyl diphenyl ether‐co‐terephthaloyl diphenyl ether) (PPTDE). The PPIDE (51 mol % isophthaloyl) and PPTDE (44 mol % terephthaloyl) were more effective as modifiers for the bismaleimide resin than was PPDE. For example, the fracture toughness (K_IC) for the modified resin increased 30% with no deterioration in the flexural strength and modulus with a 15 wt % inclusion of PPTDE (MW 23,400) compared to the parent three‐component bismaleimide resin: the K_IC increased 95% compared to the value for the Matrimid 5292 resin composed of BDM and DBA. The morphologies of the modified resins changed from particulate to cocontinuous phase structures, depending on the modifier structure and concentration. Toughening of the cured bismaleimide resin could be achieved because of the cocontinuous phase structure. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2991–3000, 2001     

苯胺二苯醚树脂-环氧耐热胶粘剂的研究

合成了一种新型环氧树脂固化剂苯胺二苯醚树脂 (ANDPO) ,研究了ANDPO ER体系的耐热性及胶粘剂性能 ,考察了固化温度、固化时间对粘接性的影响 ,得到了最佳固化工艺。结果表明 ,高聚物具有较好的耐热性能和粘接性以及常温贮存稳定性     

新型耐热胶粘剂苯胺二苯醚与双马来酰亚胺共聚物的研究

介绍了苯胺二苯醚与双马来酰亚胺共聚物的合成,采用ＴＧＡ、ＤＳＣ研究其耐热性,讨论了固化条件、不同配比、储存时间对剪切强度的影响。实验结果表明：ＡＮＤＰＯＢＭＩ树脂玻璃化温度在２７０℃左右,温度指数大于２２０℃,而且粘接性能良好,可用作新型耐热胶粘剂。     

新型耐热胶粘剂苯胺二苯醚树脂与双马来酰亚胺共聚物的研究

介绍了苯胺二苯醚树脂与双马来酰亚胺共聚物的合成,并研究了其热性能及在胶粘剂方面的应用     

改性双马来酰亚胺的应用研究

用正交实验法优化工艺条件,以二氨基二苯醚(ODA)与顺丁烯二酸酐(MA)反应合成了二苯醚双马来酰亚胺,产品收率达94.51%,纯度为99.40%。通过DSC、TG分析和拉伸性能测试比较了四种由二苯醚双马来酰亚胺,二苯甲烷双马来酰亚胺分别与二元胺,二烯丙基双酚A,环氧树脂共聚得到的产物的耐热性及力学性能。二苯醚双马来酰亚胺与二元胺及二烯丙基双酚A的共聚物的初始热失重温度,失重60%的温度,650℃时残炭率及其与环氧树脂共聚物的拉伸强度均优于二苯甲烷双马来酰亚胺体系。结果表明,二苯醚双马来酰亚胺的综合性能优于二苯甲烷双马来酰亚胺。     

Cure kinetics and morphology of blends of epoxy resin with poly (ether ether ketone) containing pendant tertiary butyl groups

The cure kinetics and morphology of diglycidyl ether of bisphenol-A (DGEBA) epoxy resin modified with a poly (ether ether ketone) based on tertiary butyl hydroquinone (PEEK-T) cured with diamino diphenyl sulphone (DDS) were investigated using differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and dynamic mechanical thermal analysis (DMTA). The results obtained from DSC were applied to autocatalytic and diffusion controlled kinetic models. The reaction mechanism broadly showed autocatalytic behaviour regardless of the presence of PEEK-T. At higher PEEK-T concentration, more diffusion controlled mechanism was observed. The rate of curing reaction decreased with increase in thermoplastic content and also with the lowering of curing temperature. The activation energies of the blends are higher than that of the neat resin. The blends showed a phase separated morphology. The dispersed phase showed a homogeneous particle size distribution. The T_g of the neat resin decreased with the decrease in cure temperature. Two T_g's corresponding to the epoxy rich and thermoplastic rich phases were observed in the dynamic mechanical spectrum. The storage modulus of 10 and 20 phr PEEK-T blends are found to be greater than the neat resin.     

Mechanical properties of poly(styrene‐co‐acrylonitrile)‐modified epoxy resin/glass fiber composites

Poly(styrene‐co‐acylonitrile) was used to modify diglycedyl ether of bisphenol‐A type epoxy resin cured with diamino diphenyl sulfone and the modified epoxy resin was used as the matrix for fiber‐reinforced composites (FRPs) to get improved mechanical properties. E‐glass fiber was used as fiber reinforcement. The tensile, flexural, and impact properties of the blends and composites were investigated. The blends exhibited considerable improvement in mechanical properties. The scanning electron micrographs of the fractured surfaces of the blends and tensile fractured surfaces of the composites were also analyzed. The micrographs showed the influence of morphology on the properties of blends. Results showed that the mechanical properties of glass FRPs increased gradually upon fiber loading. Predictive models were applied using various equations to compare the mechanical data obtained theoretically and experimentally. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008