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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of bismaleimide-modified bisphenol dicyanate epoxy matrices
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Preparation and characterization of bismaleimide-modified bisphenol dicyanate epoxy matrices

机译：双马来酰亚胺改性双酚二氰酸酯环氧基质的制备与表征

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An intercrosslinked network of epoxy matrix systems modified by cyanate ester (CE) and bismaleimide (BMI) was developed. Epoxy systems modified with 4%,8%, and 12% (by weight) cyanate ester were made by using epoxy resin and cyanate ester, with diaminodiphenylmethane as the curing agent. The reaction between the cyanate ester and the epoxy resin during the cure process of cyanate ester-modified epoxy systems was studied using Fourier transform infrared spectroscopy. The cyanate ester-toughened epoxy systems were further modified with 4%, 8%, and 12% (by weight) bismaleimicle (N,N'-bismaleimido-4,4'-di-phenylmethane). BMI-CE-Epoxy matrices were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis, and heat deflection temperature analysis. The matrices, in the form of castings, were characterized for their mechanical properties such as tensile strength, flexural strength, and unnotched Izod impact test as per ASTM methods. Mechanical studies indicated that the introduction of cyanate ester into epoxy resin improved the toughness and flexural strength, with a reduction in tensile strength and glass-transition temperature, whereas the incorporation of bismaleimide into epoxy resin influenced the mechanical and thermal properties according to its percentage content. However, the introduction of both cyanate ester and bismaleimide influenced the mechanical properties according to their percentage content. DSC thermograms of cyanate ester-modified epoxy and BMI-modified epoxy showed unimodal reaction exotherms. The thermal degradation temperature and heat distortion temperature of the cured BMI-modified epoxy and CE-epoxy systems increased with increasing bismaleimide content. (C) 2003 Wiley Periodicals, Inc. [References: 31]
机译：建立了由氰酸酯（CE）和双马来酰亚胺（BMI）改性的环氧基质体系的交联网络。通过使用环氧树脂和氰酸酯，以二氨基二苯基甲烷为固化剂，制备了用4％，8％和12％（按重量计）氰酸酯改性的环氧树脂体系。利用傅里叶变换红外光谱技术研究了氰酸酯改性环氧树脂体系固化过程中氰酸酯与环氧树脂的反应。用4％，8％和12％（按重量计）的双马来酰亚胺（N，N'-双马来酰亚胺基-4,4'-二苯基甲烷）进一步改性氰酸酯增韧的环氧体系。使用差示扫描量热法（DSC），热重分析和热变形温度分析对BMI-CE-环氧基质进行表征。根据ASTM方法，以铸件形式的基体的机械性能（如拉伸强度，弯曲强度和无缺口艾氏冲击试验）进行了表征。力学研究表明，将氰酸酯引入环氧树脂可提高韧性和弯曲强度，同时降低拉伸强度和玻璃化转变温度，而双马来酰亚胺的掺入则根据其百分比含量影响机械和热性能。 。然而，氰酸酯和双马来酰亚胺的引入都根据其百分比含量影响了机械性能。氰酸酯改性的环氧树脂和BMI改性的环氧树脂的DSC热谱图显示单峰反应放热。固化的BMI改性的环氧树脂和CE-环氧体系的热降解温度和热变形温度随着双马来酰亚胺含量的增加而增加。 （C）2003 Wiley Periodicals，Inc. [参考：31]

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