摘要
采用硅烷偶联剂对纳米SiO_2(nanoSiO_2)进行功能化改性制备nanoSiO_2—NH_2粒子,将其均匀地分散在扩链剂中,采用原位聚合制备聚四氢呋喃二醇(PTMG)型的热塑性聚氨酯(TPU)弹性体,并对其进行测试和表征。结果表明:nanoSiO_2—NH_2的加入使TPU的拉伸强度有明显的提高,当w(nano SiO_2—NH_2)为0.4%时,拉伸强度达到42 MPa,180℃下聚合物的熔融黏度为2 000 Pa·s,熔体流动速率为4.5 g/min,说明其加工性能最优;随纳米粒子的增多,TPU的热分解温度也不断提高,当w(nanoSiO_2—NH_2)为1.0%时,T_(30%)达到391.3℃。这种原位聚合的方法提高了PTMG型TPU的力学性能和耐热性,拓宽了聚醚型TPU的应用领域。
The nanoSiO2-NH2 particle was prepared by functionalized modification of nano SiO2(nanoSiO2) with silane coupling agent. The nanoSiO2-NH2 particle was uniformly dispersed into the chain extender, the polytetrahydrofuran glycol(PTMG)-based thermoplastic polyurethane(TPU)elastomer was prepared by using the in situ polymerization, and it was tested and characterized. The results show that the addition of nanoSiO2-NH2 can obviously improve the tensile strength of TPU.When w(nanoSiO2-NH2) is 0.4%, the tensile strength reaches 42 MPa, the melt viscosity of the polymer at 180 ℃ is 2 000 Pa.s, and the melt flow rate is 4.5 g/min, indicating that the processing performance is the best. With the increase of the nano particle, the thermal decomposition temperature of TPU also continuously increases. When w(nanoSiO2-NH2) is 1.0%, the T30%, reaches 391.3 ℃. The in situ polymerization method improves the mechanical performance and heat resistance of the PTMG-based TPU, and broadens the application field of the polyether-based TPU.
作者
陈淑海
刘凯良
陈海良
刘福胜
Chen Shuhai;Liu Kailiang;Chen Hailiang;Liu Fusheng(Shandong INOV Polyurethane Co.,Ltd.,Zibo 255086,China;College of Chemical Engineering,Qingdao University of Science and Technology, Qingdao 266042, China)
出处
《化学推进剂与高分子材料》
CAS
2019年第2期46-49,共4页
Chemical Propellants & Polymeric Materials
基金
山东省博士后创新项目专项资金资助项目(201603006)
关键词
纳米SIO2
热塑性聚氨酯弹性体
力学性能
耐热性能
原位聚合法
nanoSiO2
thermoplastic polyurethane elastomer
mechanical performance
heat resistance
in situ polymerization method
