纳米SiO_2颗粒对PU树脂热稳定性能的影响  

Influence of Nano-SiO_2 Particle on Thermal Stability of Polyurethane Materials

作　　者：张志华[1] 沈军[1] 吴广明[1] 夏长生[1] 杨帆[1] 孙骐[1] 倪星元[1] 

机构地区：[1]同济大学波耳固体物理研究所,上海200092

出　　处：《塑料工业》2003年第7期37-39,共3页China Plastics Industry

基　　金：国家自然科学基金重点项目;面上项目(2 0 13 3 0 40;699780 17);上海市纳米科技与产业促进中心项目(0 15 2nm0 12;0 15 9nm0 3 9)资助;上海市重点学科建设项目资助

摘　　要：采用溶胶 -凝胶法制备纳米SiO2 颗粒 ,并以此制备了SiO2 /PU复合材料 ,用扫描电子显微镜、红外光谱仪、量热示差扫描仪和热重法分别表征了纳米复合树脂材料的结构和形态及热稳定性。结果表明 ,纳米SiO2 能够均匀地以纳米尺寸分散于PU树脂中 ,并与PU中的基团发生了化学反应 ,形成了键合。SiO2 对PU树脂的耐低温性能影响不大 ,却提高了树脂的热稳定性能 ,使树脂的使用温度范围变宽。Nano SiO 2 particles were prepared by sol gel process, and polyurethane (PU)/SiO 2 nano composite materials were prepared by evenly dispersing nano SiO 2 particles in PU resin The chemical structure and morphology of the nano composites were characterized by IR and SEM The thermal stability of the PU/SiO 2 nano composite materials was studied by means of DSC and TGA The results indicated that the nano SiO 2 particles were evenly dispersed in PU resin by nano meter and chemically bonded with PU Nano SiO 2 had little influence on the low temperature resistance, but abviously improved the thermal stability of the resin, broadened the temperature range to which the resin applied

关 键 词：纳米SIO2颗粒 PU树脂 热稳定性 纳米二氧化硅 溶胶—凝胶 聚氨酯 复合材料 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]