作者：He-xin Zhang,1 Myung-sung Jung,1 Young-jun Shin,2 Keun-byoung Yoon,1 Dong-ho Lee
关键字：copolymerization; nanocomposite; ethylene; POSS; hybrid
论文来源：期刊
具体来源：Journal of Applied Polymer Science, Vol. 111, 2697–2702 (2009)
发表时间：2009年

The various monovinyl-functional polyhedral oligomeric silsesquioxane (POSS) monomers had been copolymerized with ethylene (E) using rac-Et(Ind)2ZrCl2 and a modified methylaluminoxane (MMAO) cocatalyst. The unreacted POSS monomer could be removed completely by washing the copolymerization product with n-hexane. And the copolymers were characterized with 1H NMR, TEM, DSC, TGA, and GPC to know the composition, thermal properties, molecular weight and its distribution, respectively. According to 1H NMR data, the monomer reactivity ratios of various POSS monomers were calculated by the Fineman-Ross and Kelen-Tudos methods. Thermogravimetric analysis of E/POSS copolymers exhibited an improved thermal stability with a higher degradation temperature and char yields, demonstrating that the inclusion of inorganic POSS nanoparticles made the organic polymer matrix more thermally robust.