Increase in functional groups for POSS by introducing branched phenylglycidylether
In the selected experimental conditions, firstly, the branched products with functional groups, N-(2-hydroxylpropylphenylether) (3-aminopropyl) triethoxysilane (APES-PGE, containing one hydroxyl group) and N- [ di (2-hydroxylpropylphenylether) ] (3-aminopropyl) triethoxysilane ( APES-PGE2, containing two hydroxyl groups), were synthesized by reacting 1 mole of (3-aminopropyl)triethoxysilane (APES) with 2 mole of phenylglycidylether (PGE). Then the hydrolytic condensation of APES-PGE and APES-PGE2 was performed by dissolving 1 g of the corresponding silane in 1.5 ml tetrahydrofuran (THF), adding water and eventually a catalyst ( molar ratios: [ H2O ]/Si = 3, [ NaOH ]/Si = 0.05 ), and heating at 50 ℃ for 24 h, allowing continuous evaporation of volatiles. The final products with branches containing hydroxyl groups were polyhedral oligomeric silsesquioxanes (POSS). The products from two reactions were characterized by standard spectroscopic techniques,gel partition chromatography (GPC), Fourier-transformed infrared spectroscopy (FTIR) and matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF MS). Additionally, a narrow mass distribution of multifunctionalized POSS was shown by UV-MALDI-TOF MS and assignments of the MS peaks.
作 者： 付强 胡立江 孙德智 作者单位： 付强,胡立江(Dept.of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,China)孙德智(Dept.of Environment engineering,Harbin Institute of Technology Box 713,Harbin 150001,China)
刊 名： 哈尔滨工业大学学报(英文版) EI 英文刊名： JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY(NEW SERIES) 年，卷(期)： 2004 11(1) 分类号： X707 关键词： (3-aminopropyl)triethoxysilane (APES) phenylglycidylether (PGE) Polyhedral oligomeric silsesquioxanes (POSS) matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry ( UV-MALDI-TOF MS)