Hydrolytic stability of side groups in polymer having inorganic chains of molecules

✍ Scribed by Zhdanov, A. A. ;Andrianov, K. A.

• Book ID: 104531940
• Publisher: John Wiley and Sons
• Year: 1961
• Weight: 279 KB
• Volume: 55
• Category: Article
• ISSN: 0022-3832
• DOI: 10.1002/pol.1961.1205516110

✦ Synopsis

Abstract

The hydrolytic condensation of trialkylsiloxane derivatives of the formula (R~3~SiO)~n~ Me leads to the formation of an oxanometallic chain and trialkylsiloxane groups within the framework of the main chain. The formation of polymers by this mechanism is due to the hydrolytic cleavage of the metallic atom from the trialkylsiloxane group. The subsequent stability of the polymer formed to the action of water will depend also upon the hydrolytic stability of the trialkylsiloxane residues. In order quantitatively to evaluate the rate of hydrolytic cleavage of the trialkylsiloxane group from the various trialkylsiloxane derivatives a viscometric method was employed in which changes in viscosity of solutions of the compounds were followed with respect to duration of the hydrolysis and concentration of the reactants. From the changes in viscosity of the solutions the rate of hydrolysis of the compounds and the values of the hydroytic stability constants could be calculated.