A high reactive penta-coordinated organic silicon compound(KSi(OCH 2CH 2O) 2(OCH 2CH 2OH)) was prepared, by the reaction of silica with ethylene glycol and potassium hydroxide, and di-hydroxy tetra coordinated silicon...A high reactive penta-coordinated organic silicon compound(KSi(OCH 2CH 2O) 2(OCH 2CH 2OH)) was prepared, by the reaction of silica with ethylene glycol and potassium hydroxide, and di-hydroxy tetra coordinated silicon (OCH 2CH 2O)Si(OCH 2CH 2OH)(OCH 2CH 2OCH 2CH 2OH)(DHTS) was prepared by reacting penta-coordinated silicon complex with ClCH 2CH 2OH. Composite film of DHTS/polyvinyl butyral(PVB) was prepared by a sol-gel method. The thermal property, including glass-transition temperature of the composite film were examined. When the mass ratio of PVB to tetra coordinated silicon was 1∶1.7, the on set mass loss temperature of the composite film was increased by 27 ℃ in comparison with PVB. The transparency and tenacity of the composite film were all increased. But increase of the mass fraction of DHTS could decrease the decomposition temperature of the film.展开更多
The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compou...The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compound was synthesized by the reaction of this penta-coordinate silicon potassium compound with allyl chloride.Then the copolymer was prepared by the reactwn of this ethyl tetra-coordinated silicon with the methyl-acrylic acid β-hydroxyl ethyl ester,and its structure and thermal property were characterized by IR,TG,DSC et al.IR indicated the reaction has finished because of no absorption near 1630cm-1.TG indicated the decomposing temperature of copolymer is 300 ℃.DSC indicated the glass transition temperature is 63.1℃.The copolymer was not soluble in any solvent and had no melt-point.All analysis proved the copolymer exists some extent linkage.展开更多
文摘A high reactive penta-coordinated organic silicon compound(KSi(OCH 2CH 2O) 2(OCH 2CH 2OH)) was prepared, by the reaction of silica with ethylene glycol and potassium hydroxide, and di-hydroxy tetra coordinated silicon (OCH 2CH 2O)Si(OCH 2CH 2OH)(OCH 2CH 2OCH 2CH 2OH)(DHTS) was prepared by reacting penta-coordinated silicon complex with ClCH 2CH 2OH. Composite film of DHTS/polyvinyl butyral(PVB) was prepared by a sol-gel method. The thermal property, including glass-transition temperature of the composite film were examined. When the mass ratio of PVB to tetra coordinated silicon was 1∶1.7, the on set mass loss temperature of the composite film was increased by 27 ℃ in comparison with PVB. The transparency and tenacity of the composite film were all increased. But increase of the mass fraction of DHTS could decrease the decomposition temperature of the film.
文摘The high activ penta-coordinated silicon potassium compound was prepared by the reaction of amorphous silica with the ethylene glycol,catalyzed by the potassium hydroxide,and the ethyl tetra-coordinated silicon compound was synthesized by the reaction of this penta-coordinate silicon potassium compound with allyl chloride.Then the copolymer was prepared by the reactwn of this ethyl tetra-coordinated silicon with the methyl-acrylic acid β-hydroxyl ethyl ester,and its structure and thermal property were characterized by IR,TG,DSC et al.IR indicated the reaction has finished because of no absorption near 1630cm-1.TG indicated the decomposing temperature of copolymer is 300 ℃.DSC indicated the glass transition temperature is 63.1℃.The copolymer was not soluble in any solvent and had no melt-point.All analysis proved the copolymer exists some extent linkage.
