In:
Bulletin of the Chemical Society of Japan, Oxford University Press (OUP), Vol. 43, No. 8 ( 1970-08-01), p. 2495-2500
Abstract:
Silicon-containing novel polymers, polyalkyl(aryl) silicates (Remark: Graphics omitted.) and (Remark: Graphics omitted.), 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.
Type of Medium:
Online Resource
ISSN:
0009-2673
,
1348-0634
DOI:
10.1246/bcsj.43.2495
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
1970
detail.hit.zdb_id:
160244-5
detail.hit.zdb_id:
2041163-7
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