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

• Published in: Colloid and polymer science 2005-02, Vol.283 (5), p.551-558
• Main Authors: SUZUKI, Keita, OKU, Jun-Ichi, IZAWA, Kenichi, OKABAYASHI, Hiro-Fumi, NODA, Isao, O'CONNOR, Charmian J
• Format: Article
• Language: English
• Subjects: Applied sciences; Chromatography; Correlation; Exact sciences and technology; Molecular weight; Oligomers; Organic polymers; Physicochemistry of polymers; Polycondensation; Polymeric precursors; Polystyrene resins; Preparation, kinetics, thermodynamics, mechanism and catalysts; Silanes; Spectra; Two dimensional
• ISSN: 0303-402X; 1435-1536
• DOI: 10.1007/s00396-004-1185-1

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 CH^sub 3^SO^sub 3^H (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 CH^sub 3^SO^sub 3^H-catalyzed system.[PUBLICATION ABSTRACT]