Author: | Shankar, Ravi; Saxena, Anubhav; Brar, Ajaib S |
Advisor: | Advisor |
Date: | 2002
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Publisher: | |
Citation: | Journal of
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Item Type: | Article
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Keywords: | Carbosilane; Hydrosilylation; Dehydropolymerization; Microstructure; Deconvolution |
Abstract: | New functional polysilanes [R2R1Si(CH2)2SiH]n (R=Me, R1=H (1); R=R1=Et (2); R=Me, R1=Ph (3)) bearing carbosilyl side chains have been synthesized by catalytic dehydropolymerization of precursor carbosilanes R2R1SiCH2CH2SiH3 using Cp2TiCl2–BuLi as a catalyst. These polymers are characterized by 1H, 13C, 29Si, {1H–29Si} HSQC NMR spectroscopy, GPC and TGA. Attempts to delineate the tacticity from the analysis of deconvoluted 29Si{1H}-NMR signals associated with the side chain silicon atoms reveal that the triad concentration ratio follows a Bernoullian statistical model for polymers 1 and 2 only. |