摘要
研究了具有不同摩尔比的酚醛型氰酸酯(NcE)与双酚A型环氧(E-51)共固化树脂的化学结构与物理性能．结果表明,在共固化树脂的结构中,主要存在着三嗪、噁唑啉酮、异氰脲酸、醚键等化学结构．只有当氰酸酯的摩尔数大于环氧时,随着共固化体系中-OCN摩尔数的提高,化学结构中三嗪环含量增大,共固化树脂的力学性能、玻璃化转变温度(T_g),烧蚀残留率、吸水率随之提高；当-OCN/epoxy的摩尔比大于1时,固化树脂的T_g比摩尔比小于1时提高30℃以上,力学性能的变化具有相同的规律．
The chemical structure and physical property of co-cured novolac cyanate ester（NCE） and bisphenol A epoxy with various molar ratios were investigated. These co-cured polymers were extensively characterized for their thermal stability, and char yield properties using Fourier transform infrared （FTIR）, dynamic mechanical analysis （DMA）, thermogravimetric analysis （TGA）, and water uptake and mechanical studies. Triazine, oxazolidinone, isocyanurate and ether structures can be found in fully cured resins. The content of triazine increased by -OCN proportion. Physical properties of the cured resins depend on the chemical structures, especially the triazine content. The flexural strength, impact strength, glass transition temperature （Tg）, char yield and water uptake were increased by -OCN content. Tg of cured resins has been improved by 30 ℃ or higher when -OCN/epoxy molar ratio is more than 1, compared with those less than 1.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2006年第6期637-640,共4页
Chinese Journal of Materials Research
基金
国家自然科学基金50273029资助项目.
