Interphase formation in model composites studied by micro-thermal analysis
Interphase formation in model composites studied by micro-thermal analysis
复制标题
通过微热分析研究模型复合材料中的界面形成
DOI：
10.1016/s0032-3861(02)00298-7
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
B. Mele
中科院分区：
文献类型：
--
作者：
G. Assche;B. Mele
采用微热分析方法研究了环氧树脂基颗粒填充复合材料中形成的界面相。在电导率图像中可以观察到颗粒的亚表面分布，而热性质的空间变化可以通过局部热分析来确定。对于填充有多孔二氧化硅颗粒的环氧树脂体系，在颗粒周围观察到界面相。在CA。60μm宽的界面，玻璃化转变温度从体相值逐渐降低到低约10°C的值。在热导率图像和局部热分析中可以检测到不太密集的交联界面。界面的形成归因于吸附水对聚合机理的影响。
Micro-thermal analysis was used for studying interphases formed in particle-filled composites based on an epoxy resin matrix. The subsurface distribution of the particles can be observed in the conductivity images, while spatial variations in thermal properties can be determined by local thermal analyses. For an anhydride-cured epoxy system filled with porous silica particles, an interphase is observed around the particles. In the ca. 60μm wide interphase, the glass transition temperature gradually decreases from the bulk value to a value about 10°C lower. The less densely cross-linked interphase can be detected in the thermal conductivity images and in the local thermal analyses. The interphase formation is attributed to the effect of adsorbed water on the polymerisation mechanism.