期刊
HIGH PERFORMANCE POLYMERS
卷 29, 期 9, 页码 1016-1026出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954008316667788
关键词
Phthalonitrile; bismaleimide; processability; mechanical properties; dielectric properties
资金
- National Natural Science Foundation [51373028, 51403029]
- Ningbo Major (key) Science and Technology Research Plan [2013B06011]
- South Wisdom Valley Innovative Research Team Program
Allyl-functional phthalonitrile (DBPA-Ph) and bismaleimide (BMI) have been considered as advanced composite-matrix resins applied in various fields. In this work, self-promoted polymerization behavior and processability of DBPA-Ph/BMI system were investigated in detail. To further reveal the effect of BMI on the properties of DBPA-Ph/BMI system, the blends and the prepolymers of DBPA-Ph/BMI were prepared in different proportions. Their curing and rheological behaviors were investigated by differential scanning calorimetry and dynamic rheological analysis. The results further confirmed the possible reaction mechanisms and demonstrated that DBPA-Ph/BMI prepolymers exhibited good processability, which included wide processing window (approximately 75 degrees C), low melting viscosity (< 0.2 Pas), and better reactivity. The copolymers exhibited satisfactory thermal stabilities (T-5% > 421 degrees C, char yield at 600 degrees C > 70%). Moreover, the DBPA-Ph/BMI/glass fiber composite laminates were prepared and the effect of the curing temperature and BMI content on mechanical properties and dielectric properties were also investigated. The results show that the composite laminates exhibit favorable mechanical properties and weak frequency dependence of dielectric properties over a wide frequency range. Above all, the research on DBPA-Ph/BMI system could expand its applications in industry, especially in the areas, which require high temperature resistance and excellent mechanical and dielectric properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据