摘要
分别采用BaTiO3纳米粉和纤维为填料,以改性的聚氨酯(PU)和不饱和聚酯树脂(UP)制备的互穿聚合物网络(IPNs)为骨架材料,采用在位分散聚合法,制备了均匀性较高BaTiO3/IPNs复合型阻尼材料,并研究了BaTiO3形态及复合量对BaTiO3/IPNs型复合材料阻尼性能的影响.结果表明,复合后材料的阻尼性能,除与无机填料的性质有关,主要受其形态影响,纤维状BaTiO3对复合体系的阻尼损耗因子(tanδ)极值和阻尼损耗模量(E′)峰面积提升较为明显;BaTiO3纳米粉的复合量增加到70%(V/V)),E′增加102倍,且tanδ曲线肩峰和主转变峰的位置均移向高温区,相应明显拓宽了室温区的阻尼损耗因子值.
Well-dispersed BaTiO3/IPNs damping nanocomposites based on modified polyurethane (PU) and unsaturated polyester resin (UP) interpenetrating polymer networks were prepared by in-situ polymerization process, using BaTiO3 nano powders and fibers as filler. The influences of shapes and amounts of BaTiO3 in system on damping behaviors were studied. The results indicate that the damping properties of the composites were affected mainly by the shapes of filler besides the kinds of that added. Fiber-shaped BaTiO3 increased the values of loss factor and the peak areas of loss modulus(E'') apparently. As the amount of BaTiO3 added into the system increased to 70%(V/V), E'' improved 102 times as compared with that of pure PU/UP IPNs, and both the shoulder peak and main transitional peak moved toward higher temperature range. So the values of loss factors at room temperature could be enlarged greatly by adding BaTiO3.
出处
《航空材料学报》
EI
CAS
CSCD
2004年第5期40-43,共4页
Journal of Aeronautical Materials
