Alkoxysilanes. V. The Preparation of Polyalkyl(aryl) Silicates
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概要
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Silicon-containing novel polymers, polyalkyl(aryl) silicates (<U>Remark: Graphics omitted.</U>) and (<U>Remark: Graphics omitted.</U>), were prepared by the reaction of diaminosilanes with aliphatic or aromatic diols. The products were a white powder (fused at about 300°C), a highly viscous liquid, or a glassy solid; these products were soluble in common organic solvents, but insoluble in methanol. The results of the molecular-weight determination by the vapour-pressure method indicated that some of polymers had a molecular weight of 5000 or 6000. A study of the thermal stability of the polymers by means of TGA and DTA analysis made clear that the polymers with the aryloxy group in the molecular main chain were remarkably more stable than those with the alkoxy group. The former indicated a weight loss of about 50% at 350–400°C. An investigation of the TGA curve and thermal decomposition products allowed us to discuss the probable process for the degradation of the polymers. The reaction of the diaminosilanes with 1,4-butanediol afforded distillable products rather than the expected polymers; these products were identified as being cyclic alkoxysilanes.
- 公益社団法人 日本化学会の論文
著者
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Kijima Ichiro
Department Of Industrial Chemistry Science University Of Tokyo
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Abe Yoshimoto
Department Of Food Science Faculty Of Health And Nutrition Tokyo Seiei College
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Kijima Ichiro
Department of Industrial Chemistry, Faculty of Engimeering, Science University of Tokyo
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Takeuchi Takeo
Department of Industrial Chemistry, Faculty of Engimeering, Science University of Tokyo
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