论文部分内容阅读
三种表面改性剂,即硅烷偶联剂(PTMS)、含PTMS的稀土改性剂(PTMS-RES)和稀土改性剂(RES),用于磨碎玻璃纤维表面处理,探讨了不同表面处理剂对磨碎玻璃纤维/聚四氟乙烯(MGF/PTFE)复合材料介电性能、热膨胀系数、热导率的影响。测试了稀土改性剂、未改性的磨碎玻璃纤维和PTMS-RES改性的磨碎玻璃纤维的FTIR谱图,并用SEM对MGF/PTFE复合材料的断口形貌进行分析。结果表明:与未经表面改性的MGF/PTFE复合材料相比,经表面改性的MGF/PTFE复合材料的介电性能、热膨胀系数、热导率都得到改善。由于稀土特殊的电子层结构以及对阴离子有强吸引作用,RES改性效果比PTMS更好。由于稀土与PTMS共同的作用,PTMS-RES比RES能更好地改善磨碎玻璃纤维与PTFE的界面,促进磨碎玻璃纤维与PTFE的界面粘结。
Three kinds of surface modifiers, namely silane coupling agent (PTMS), PTMS-containing rare earth modifier (PTMS-RES) and rare earth modifier (RES), were used to grind glass fiber surface treatment. Effect of Treatment Agent on Dielectric Properties, Thermal Expansion Coefficient and Thermal Conductivity of Milled Glass Fiber / Polytetrafluoroethylene (MGF / PTFE) Composites. The FTIR spectra of rare earth modifier, unmodified ground glass fiber and PTMS-RES modified ground glass fiber were tested. The fracture appearance of MGF / PTFE composite was analyzed by SEM. The results show that the dielectric properties, thermal expansion coefficient and thermal conductivity of surface modified MGF / PTFE composites are improved compared with that of MGF / PTFE composites without surface modification. Due to the special electronic layer structure of rare earths and the strong attraction to anions, the RES modification effect is better than that of PTMS. Due to the common role of rare earth and PTMS, PTMS-RES can better improve the interface between milled glass fiber and PTFE and promote the interfacial bonding between milled glass fiber and PTFE.