The preparation and properties of ABS/BN thermally conductive polymer composites

• Main Authors: Hsiang-jen Hsiao, 蕭翔仁
• Other Authors: Gwo-Geng Lin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/39052801451191505554

碩士 === 淡江大學 === 化學工程與材料工程學系碩士班 === 95 === The goal of this study is to enhance thermal conductivity of polymer composite, and find the optimal polymer matrix/filler composition between product’s thermal conductivity and practicability. Thermally conductive ABS/BN composites were prepared by melt blending with twin screw extruder. All specimens were prepared by injection molding and thermal conductivity、rheological properties and mechanical properties were investigated. Thermal conductivity of ABS/BN increased with BN content increased, an apparent increase of thermal conductivity when BN content is more than 20 wt. %, it’s believed that the BN content is sufficient to form conductive net-work. Thermal conductivity of ABS/BN composite treated with coupling agent is higher than un-treated one since the interfacial properties of composites treated with coupling agent were better. Rheological properties were tested by plate to plate and capillary rheometer. Storage modulus and viscosity of composites was increased with BN content increased. Impact strength of composite decreased sharply with BN content increased, but a slightly improvement observed on composites treated with coupling agent. Tensile and flexural modulus increased with BN content increased. Composites treated with coupling agent were tougher than un-treated ones. Morphology of ABS/BN composites were investigated by SEM. The dispersion conditions of filler in polymer matrix with or without coupling agent offered direct evidence to the variations of composites mechanical properties.