空心微珠对树脂基复合材料成型及性能的影响

Effect of Content of Hollow Glass Microsphere on Forming and Properties of Resin-Based Composite Material

摘要: 利用模压成型与注模成型制备了玻璃微珠质量分数为21%~62%的复合材料，对空心玻璃微珠与环氧树脂混合料的性态、所得到复合材料的性能及显微结构进行了详细的研究。研究结果表明，空心玻璃微珠含量对混合料的性态有较大的影响，根据其粘度水平的不同，可将不同微珠含量的混合料大致分为四种状态，即流动态(21%~35%)、滞留态(36%~45%)、塑性泥料态(46%~55%)和粉粒态(56%~62%)。滞留态混合料有利于得到高强度、低密度复合材料。塑性泥料态和粉粒态会使复合材料中残存大量的连通气孔，虽然可以降低材料密度，但会导致材料吸水率的急剧增加。

Abstract: Composites with 21% - 62% (wt%) hollow glass microspheres were synthesized by molded forming and injection forming. Properties, microstructure and the behavior of mixture were detailed investigated. Results showed that the content of hollow glass microsphere had a great effect on the behavior of mixture, and the mixture of the different microspheres content can be roughly classified into four states according to the viscosity, which were flow state (21% - 35%), stagnant state (36% - 45%), plastic-mud state (46% - 55%) and powder-grain state (56% - 62%). Mixture in stagnant state was conducive for preparation of high-strength, low-density composite material, while there existed numbers of stomata through the composite material for those in plastic-mud state and powder-grain state, which could reduce the density of material, but would sharply increase the water absorption.