橡胶及塑料填料用高岭土表面改性技术研究现状及展望

高岭土是橡胶和塑料等高分子材料制品的重要填料之一。研究开发不同的高岭土改性方法,是扩大高岭土应用范围及改善其应用效果的重要手段。本文讨论了近年来高岭土常用的改性方法以及部分学者的科研成果,并对其发展趋势进行了展望。

粉煤灰在橡塑复合材料中的应用

介绍了掺有粉煤灰的高分子复合材料的应用研究状况,简述了粉煤灰作为高分子复合材料补强填料的主要影响因素。粉煤灰的粒度、表面吸附性是影响补强性能的关键因素。通过超细粉碎,表面改性,部分或全部替代炭黑用作橡胶补强填料是可行的,大大降低制品的生产成本,提高粉煤灰的利用率。

Evaluation of the effective thermal conductivity of composite polymers by considering the filler size distribution law

We present an empirical model for the effective thermal conductivity (ETC) of a polymer composite that includes dependency on the filler size distribution-chosen as the Rosin-Rammler distribution. The ETC is determined based on certain hypotheses that connect the behavior of a real composite material A, to that of a model composite material B, filled with mono-dimensional filler. The application of these hypotheses to the Maxwell model for ETC is presented. The validation of the new model and its characteristic equation was carried out using experimental data from the reference. The comparison showed that by using the size distribution law a very good fit between the equation of the new model (the size distribution model for the ETC) and the reference experimental results is obtained, even for high volume fractions, up to about 50%.