Preparation and Mechanical Properties of HIPS Composites Containing PS-grafted-hydroxyapatite Partic

• 作 者: 龚兴厚 解孝林
• 机 构: Department of Chemistry Huazhong University of Science and Technology Wuhan 430074 China,Department
• 出 处: Journal of Wuhan University of Technology-Materials Science
• 发表日期: 2005年S1期
• 关键词: grafted hydroxyapatite polystyrene implantation styrene crease tensile coated re

The surfaces of the micron-sized HA particles were modified by in situ copolymerization of vinyl triethoxyl silane (VTES) and styrene (St). Then, the modified HA particles were compounded with HIPS. The results showed that the polystyrene (PS) macromolecules were grafted on the surfaces of HA particles during in situ copolymerization of VTES and St. Thereby, PS chains grafted on the HA surface enhance the compatibility between HA and HIPS, improve the dispersion of HA particles in HIPS matrix, and enhance the interfacial adhesion between HA and matrix. The stiffness, tensile strength and notch impact strength of HIPS/HA composites are improved at the same time. And there is a critical coating thickness of PS to the HA surface for the optimum mechanical properties of HIPS/HA composites.

The surfaces of the micron-sized HA particles were modified by in situ copolymerization of vinyl triethoxyl silane (VTES) and styrene (St). Then, the modified HA particles were compounded with HIPS. The results showed that the polystyrene (PS) macromolecules were grafted on the surfaces of HA particles during in-situ copolymerization of VTES and St. Thus, PS chains grafted on the HA surface enhance the compatibility between HA and HIPS, improve the dispersion of HA particles in HIPS matrix, and enhance the interfacial adhesion between HA and matrix. The stiffness, tensile strength and notch impact strength of HIPS / HA composites are improved at the same time. And there is a critical coating thickness of PS to the HA surface for the optimum mechanical properties of HIPS / HA composites.