In-situ Polymerization and Characterization of Poly (ε -caprolactone) Urethane/ SiO2 Nanocomposites
Nanocomposites of poly(ε-caprolactone) (PCL) castable polyurethane elastomer (CPUE) with nano-SiO2 particles of different surface properties were prepared via in-situ polymerization. An electronmechanical universal testing machine, a durometer, a rubber resilience experimental machine, a dynamicmechanical analyzer, a thermogravimetric analysis and a scanning electron microscope were used to investigate the macro static/dynamic mechanical properties, micro-dispersed state and thermostability. The results showed that the modulus at 100% and 300%, elongation at break, tensile strength and tear strength of poly(ε -caprolactone) urethane nanocomposites were increased by introducing a certain amount of nano-SiO2. Especially the tensile strength and tear strength at 100℃ of the PCL CPUE with 5% nano-SiO2 pretreated by γ-glycidochloropropyl methyl trimethoxy silane (trade name A-187) were 1.50 and 1.94 times than those of the pure PCL CPUE, respectively. The addition of the nano-SiO2 had little effect on the hardness, but the impact resilience decreased slightly. The loss factor peaks of two nanoSiO2 polyurethane composites were higher obviously than the pure PCL CPUE and the glass transition temperature (Tg) of the two nano-SiO2 polyurethane composites increased to higher temperature region. The surface treatment by the optimum silane coupling agent influenced the dispersibility of nano-SiO2 in the PCL CPUE distinctly. The agglomerating phenomenon, and even some nano-agglomerates with more than1 μm diameter can be observed in the PCL CPUE with 5% untreated nano-SiO2, but the nano-SiO2 pretreated by A-187 was dispersed in the PCL CPUE at nano-scale.
Xiao-dong Chen Nan-qiao Zhou Hai Zhang
National Engineering Research Center of Novel Equipment for Polymer Processing,South China Universit National Engineering Research Center of Novel Equipment for Polymer Processing,South China Universit Guangzhou SCUT Bestry Technology Joint-stock Co.Ltd,Guangzhou,Guangdong,510640,China
国际会议
The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)
湖南湘潭
英文
1-10
2009-10-23（万方平台首次上网日期，不代表论文的发表时间）