Two-dimensional gel permeation chromatography (2D GPC) correlation studies of the aggregate-aggregate interactions in acid-catalyzed triethoxysilyl-terminated polystyrene systems. The effect of specific catalysts on growth process

Autor:	Charmian J. O'Connor, Hirofumi Okabayashi, Isao Noda, Jun-ichi Oku, Kenichi Izawa, Keita Suzuki
Rok vydání:	2004
Předmět:	Aggregate (composite) Polymers and Plastics Oligomer Catalysis Gel permeation chromatography chemistry.chemical_compound Colloid and Surface Chemistry chemistry Acid catalyzed Scientific method Polymer chemistry Materials Chemistry Polystyrene Physical and Theoretical Chemistry Tetrahydrofuran
Zdroj:	Colloid and Polymer Science. 283:551-558
ISSN:	1435-1536 0303-402X
DOI:	10.1007/s00396-004-1185-1
Popis:	A set of time resolved gel-permeation chromatography (GPC) profiles, for the reaction mixture of a well-defined polymeric silane coupling agent, triethoxysilyl-terminated polystyrene with molecular weight equal to 8000 (TESi-PS (8000)), catalyzed by HCl (0.1 mol/kg) in tetrahydrofuran (THF), was measured over a long time scale (1–768 h). The GPC profiles were then converted to two-dimensional (2D) correlation spectra. The 2D GPC correlation spectra were compared with those for the CH3SO3H (0.1 mol/kg)-catalyzed TESi-PS (8000)-THF system. It has been demonstrated that predominant production of less-reactive oligomers in the HCl-catalyzed system hinders further growth of the oligomer, while formation of reactive oligomers leads to further growth of polymeric precursors in the CH3SO3H-catalyzed system.
Databáze:	OpenAIRE
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