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Living random copolymerization of ethene and norbornene using ansa‐fluorenylamidodimethyltitanium complex
Author(s) -
Hasan Tariqul,
Shiono Takeshi,
Ikeda Tomiki
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450913
Subject(s) - norbornene , methylaluminoxane , copolymer , polymer chemistry , glass transition , polymerization , molar mass distribution , materials science , metallocene , polymer , composite material
Ethene‐norbornene copolymerizations were conducted by ( t ‐BuNMe 2 SiFlu)TiMe 2 ( 1 ) activated with dried methylaluminoxane (MAO) (free from Me 3 Al) at 0°C and 20°C under atmospheric pressure of ethene at various norbornene concentrations. At 0°C and high norbornene concentration, the molecular weight of the copolymer increased linearly against polymerization time while keeping narrow molecular‐weight distribution. The 13 C NMR spectrum revealed that random copolymer with 53 mol‐% of norbornene was obtained. The glass transition temperature was above 150°C.