摘要
以含二氮杂萘酮结构聚芳醚砜酮（PPESK）为基体，正硅酸乙酯（TEOS）为原料，N-甲基吡咯烷酮（NMP）为共溶剂，采用溶胶-凝胶方法制备出不同二氧化硅质量百分含量的PPESK／SiO2杂化材料。利用动态热机械分析仪（DMA）对PPESK／SiO2杂化均质薄膜进行动态力学性能测试和表征。结果表明，杂化材料中SiO2组分含量及扫描频率对PPESK／SiO2杂化材料的动态力学性能及玻璃化转变过程都有一定程度影响。SiO2含量的增加，杂化材料的力学损耗峰温度移向高温区，并且峰值升高；随着扫描频率的增加，杂化材料的损耗因子峰移向高温。同时采用Arrhenius方程计算PPESK／SiO2杂化材料在α转变时分子运动活化能。另外，还考察了SiO2粒子含量对PPESK／SiO2杂化材料的力学性能的影响。
A series poly （phthalazinone ether sulfone ketone）（PPESK）/SiO2 hybrid material with different contents of SiO2 was prepared by sol-gel process with soluble poly （phthalazinone ether sulfone ketone） and SiO2 sol in NMP solution. Dynamic mechanical properties of PPESK/SiO2 hybrid uniform coatings have been investigated by using dynamic mechanical thermal analysis （DMA）. The results indicated that SiO2 contents and scanning frequency had some effect on dynamic mechanical properties and glass transition of PPESK/SiO2 hybrid material. The damping peaks were found to increase with increasing of SiO2 contents and move to high temperature. Increasing of scanning frequencies, the damping peaks of hybrid materials shift to high temperature. The Arrhenius relationship has been used to calculate the activation energy of or-transition of PPESK/SiO2 hybrid material. In addition, effects of SiO2 contents on mechanical properties of PPESK/SiO2 were carried out.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A09期3595-3599,共5页
Journal of Functional Materials
