The main subject of this work is about the effect of T-ZnOw on the toughness and stiffness of polystyrene (PS).In order to avoid the rupture of T-ZnOw during the melt processing,T-ZnOw/PS composites were obtained via the combination of solution blending and injection moulding methods.Although the tensile strength of the composites decreases slightly,the impact strength and tensile modulus increase with the increase of the T-ZnOw content in the matrix.The stiffness and toughness of the composites are enhance...
<正>The main subject of this work is about the preparation of T-ZnOw/PS composites through different methods and the evaluation of mechanical properties of the composites.Different surface modification methods of T-ZnOw whiskers,the so called wet-type modification and dry-type modification,and different molding processing methods of T-ZnOw/PS composites,namely compression molding and injection molding,have been employed.Two different coupling agents, titanate coupling agent (NDZ105) and silane coupling agent (KH560),have been used to treat T-ZnOw.Both the interface structure between T-ZnOw whiskers and PS and the distribution of integrated T-ZnOw whiskers in composites have been studied by SEM.The mechanical properties of T-ZnOw/PS composites obtained through the above different methods have been studied comparatively.Although the tensile strength of the composites decreases slightly,the impact strength and tensile modulus increase with increasing the content of T-ZnOw in the composites.Both coupling agents and molding methods have great influence on the mechanical properties of the composites.The study of the impact-fractured surface shows that craze formation in PS matrix during the impact process is the main reason for the improvement of the composite toughness.
As a part of serial work about the application of a tetra-needle-shaped whisker(T-ZnOw) with a spatial structure in polymer composites,this work is focused on the effect of T-ZnOw dimension on the properties of polymer composites. Two kinds of T-ZnOw whiskers with different dimensions(big and small one) are introduced into PA6 composites.Our results show that for the big whisker and the small whisker both,the addition of T-ZnOw induces the mechanical property improvement of T-ZnOw/PA6 composites.Especially,...
