CONCERTED H-BONDING TEMPLATE SYNTHESIS OF AN ORDERED LADDER POLYSILSESQUIOXANE

• 作 者: 张榕本
• 机 构: PCLCC (Polym. Chem. Lab. Chinese Academy of Sciences & China Petro-Chemical Corp.) State Key Labora
• 出 处: Chinese Journal of Polymer Science
• 发表日期: 2006年05期
• 关键词: ladder monomer calorimetry benzoyl moiety template assembly chains bonding narro

A novel soluble regular ladder poly(benzoyl-3-aminopropyl) silsesquioxane (LPBAS) was facilely prepared under effective assistance of concerted H-bonding self-assembly of amido groups of side chains and silanol groups, respectively, of a new template monomer [1,3-bis(benzoyl-3-aminopropyl)-1,1,3,3-tetraethoxydisiloxane] (M). The ordered ladder structure of LPBAS is manifested in: (1) the presence of two Bragg peaks representing the ladder width (d) and ladder thickness (t) in X-ray diffraction (XRD) pattern; (2) narrow base-line width (w = 6) of resonance absorption for -CH2SiO3/2 moiety in 29Si-NMR and (3) high glass transition temperature Tg = 112℃in differential scanning calorimetry (DSC) analysis.

A novel soluble regular ladder poly (benzoyl-3-aminopropyl) silsesquioxane (LPBAS) was facilely prepared under effective assistance of concerted H-bonding self-assembly of amido groups of side chains and silanol groups, respectively, of a new template monomer [1 (M). The ordered ladder structure of LPBAS is manifested in: (1) the presence of two Bragg peaks representing the ladder width ((3) (2) narrow base-line width (w = 6) of resonance absorption for -CH2SiO3 / 2 moiety in 29Si-NMR and (3) high glass transition temperature Tg = 112 ° C in differential scanning calorimetry (DSC) analysis.