共查询到19条相似文献,搜索用时 93 毫秒
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双马来酰亚胺树脂(BMI)具有优异的耐高温等优良特性,因此广泛用于航空航天等领城.但是,未改性双马亚酰亚胺树脂熔点高、溶解性差、脆性大,而通过增韧改性却可以较好地改善其性能,更好满足加工工艺和使用性能上的需要.介绍了二元胺增韧、烯类化合物增韧、热塑性树脂增韧、橡胶增韧、无机填料增韧等几种双马来亚胺树脂的改性增韧方法. 相似文献
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《玻璃钢/复合材料》2020,(4)
为了改善双马来酰亚胺树脂(BMI)固有的一些缺点,本文以含有氨基的聚硅氧烷(PSi-NH_2)作为胺源,以苯酚作为酚源,通过化学合成的方法制备了结构中含有超支化聚硅氧烷的苯并噁嗪单体(PSi-BOZ),并以其作为改性体系对BMI进行改性,得到了一种新型的PSi-BOZ/BMI共混材料,并研究了PSi-BOZ的添加对BMI固化反应动力学及冲击性能的影响,为新型BMI树脂材料的开发提供了思路。 相似文献
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国内双马来酰亚胺树脂改性研究进展 总被引:3,自引:0,他引:3
目前双马来酰亚胺(BMI)树脂作为一种高性能树脂基体应用广泛。文中概述了国内二元胺改性BMI树脂、烯丙基化合物改性BMI树脂、热塑性树脂改性BMI树脂、弹性体改性BMI树脂及其他一些BMI树脂的改性方法。 相似文献
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介绍了双马来酰亚胺(BMI)树脂几种主要增韧改性方法的研究进展,其中包括BMI与烯丙基化合物(APC)共聚,新型BMI单体的合成,BMI与芳胺加成扩链,高性能热塑性(TP)树脂改性,热固性树脂如氰酸脂与BMI的共聚改性,刚性粒子增韧等。还介绍了BMI树脂改性与应用的新方向:辐射固化BMI树脂,泡沫BMI材料,高频印制电路板用基体树脂,电机用绝缘胶和无溶剂浸渍树脂等。 相似文献
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采用催化剂、3,3′-二烯丙基双酚A(DP)和多官能团单体C改性4,4′-二氨基二苯甲烷双马来酰亚胺(BMI)树脂,制取低温固化、高温性能优良的改性BMI树脂。采用差示扫描量热法(DSC)研究了改性BMI树脂的固化反应动力学,计算了固化反应体系的动力学参数,进而提出了该改性BMI树脂固化成型过程的动力学模型,并结合傅里叶红外光谱(FT-IR)对反应机理进行了探讨。研究结果表明,催化剂对固化反应的进行有重要的促进作用,改性BMI树脂的固化温度由259℃降为178℃;烯丙基与马来酰亚胺基的"ene"反应非常显著,且改性剂C与DP的"ene"反应历程相似;改性BMI树脂的固化工艺确定为120℃×6h+140℃×2h+160℃×2h+180℃×2h,后处理工艺为200℃×6h。 相似文献
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以双马来酰亚胺(BMI)作为苯并噁嗪(BZ)树脂的改性剂,采用非等温差示扫描量热(DSC)法及Freeman-Carroll法研究了改性BMI/BZ树脂体系的反应特性和固化反应动力学过程。结果表明:改性BMI/BZ树脂体系的凝胶时间随BMI用量增加而缩短;改性BMI/BZ树脂体系的固化反应只有一个放热峰,其峰顶温度(230℃左右)明显低于纯BZ体系,并且与BMI用量无关;改性BMI/BZ树脂体系的固化反应近似于1级反应,当w(BMI)=30%~50%时,所建立的固化反应动力学模型在10℃/min时能较好描述改性树脂体系的固化反应过程。 相似文献
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硼酚醛改性BMI树脂的研究 总被引:1,自引:0,他引:1
在传统的4,4-双马来酰亚胺基二苯甲烷/二烯丙基双酚A体系中引入硼酚醛结构,以改善传统双马来酰亚胺(BM)树脂的燃烧性能,结果表明,在一定范围内随着硼酚醛结构含量的增加,明显提高了BMI体系在空气中的热分解温度,改善了BMI体系的燃烧性能,而原BMI体系的工艺性能及力学性能保不变。 相似文献
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The kinetics of curing for a modified bismaleimide (BMI) resin was investigated to ascertain a suitable cure model for the material. The resin system used in this study was composed of 4,4′‐bismaleimidodiphenylmethane (BMIM) and 0,0′‐diallyl bisphenol A (DABPA, DABA). The BMIM was the base monomer and the DABPA was the modified agent. A series of isothermal DSC runs provided information about the kinetics of cure in the temperature range 170–220°C. Regardless of the different temperatures, the shape of the conversion curves was similar, and this modified BMI resin system underwent an nth‐order cure reaction. Kinetic parameters of this BMI resin system, including the reaction model, activation energy, and frequency factor, were calculated. From the experimental data, it was found that the cure kinetics of this resin system can be characterized by a first‐order kinetic model. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3338–3342, 2004 相似文献
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双马来酰亚胺树脂扩链增韧改性研究 总被引:2,自引:0,他引:2
研究了采用腰果壳油增韧改性双马来酰亚胺树脂的方法,双马来酰树脂虽具有突出的耐热性,良好的机能及加工性能,但其最大不足是固化物脆性大,因此必须引进长链的柔性分子或分合物对双马来酰亚胺树脂加以改性,增加其韧性,改善其机械性性能,扩大其应用邻域,腰果壳油具有柔性长链分子,而且还有不饱和双键,能与双马来酰亚胺树脂的不饱和双键反应,它是一种良好的改性剂,本篇论文探讨了双马来酰亚胺树脂与腰果壳油长链分子反应机理,考察了改性树脂的力学性能和热学性能,对其工艺和配方也作了初步探讨。 相似文献
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采用二元胺、环氧树脂和改性剂A对双马来酰亚胺树脂进行增韧改性,制备出无溶剂型双马来酰亚胺树脂。通过红外光谱和差示扫描量热法等研究了改性树脂的结构、反应程度和耐热性,结果表明该改性树脂的粘度和适用期能够满足湿法缠绕成型工艺要求,且高温下具有很好的反应性,其浇铸体具有较好的力学性能和耐热性。 相似文献
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Paraformaldehyde was end‐capped with acetyl groups and was applied as a crosslinking agent for a bismaleimide (BMI)‐modified novolac resin system. The processibility of the resin system containing 5 wt % crosslinking agent still met the need for resin transfer molding (RTM), whereas the thermomechanical properties of crosslinked resin improved significantly. The composites based on the resin system and woven glass fabric showed better flexural strength, modulus, and higher retention rates at 200 and 300°C than that based on a resin system without acetyl‐capped paraformaldehyde. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1265–1271, 2002 相似文献
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Properties of bismaleimide resin modified with polyrotaxane as a stress relaxation material
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In this study, 4,4′‐diphenylmethane bismaleimide (BMI)/2,2′‐diallylbisphenol A (DABPA) resin was modified with polyrotaxane (PR) as a stress relaxation material. Based on a dynamic mechanical analysis and various properties of the cured resin, the influence of the motion of PR on the cured properties of BMI/DABPA/PR alloy is discussed. The cyclic molecule α‐cyclodextrin (α‐CD) that is threaded onto the PR axis contains a methacryl group in its side chain that reacts with the allyl group of BMI/DABPA resin. The methacryl group of PR reacted with the allyl group of BMI/DABPA matrix resin to form a transparent and dense network structure, so that the glass transition temperature was increased with increasing PR concentration. In addition, the toughness, impact resistance and adhesiveness of BMI/DABPA resin were improved by modification with PR. These results indicate that the poly(ethylene glycol) chain, which is the axial polymer of the PR, moves in the space formed by the cavities of the threaded α‐CD and the surrounding BMI/DABPA resin matrix in the glassy state, thereby relaxing the internal stress applied to BMI/DABPA/PR resin. The range of applications of BMI/DABPA resin modified with PR may expand into fields requiring high heat resistance in addition to excellent toughness and adhesiveness. © 2018 Society of Chemical Industry 相似文献