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Preparation and properties of ethylene/POSS copolymer with rac ‐Et(Ind) 2 ZrCl 2 catalyst
Author(s) -
Zhang Hexin,
Jung Myungsung,
Shin Youngjun,
Yoon Keunbyoung,
Lee Dongho
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29284
Subject(s) - copolymer , monomer , polymer chemistry , methylaluminoxane , thermogravimetric analysis , materials science , thermal stability , reactivity (psychology) , silsesquioxane , polymer , ethylene , polymerization , catalysis , metallocene , chemistry , organic chemistry , composite material , medicine , alternative medicine , pathology
The various monovinyl‐functional polyhedral oligomeric silsesquioxane (POSS) monomers had been copolymerized with ethylene (E) using rac ‐Et(Ind) 2 ZrCl 2 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 1 H NMR, TEM, DSC, TGA, and GPC to know the composition, thermal properties, molecular weight and its distribution, respectively. According to 1 H 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. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009