80980-83-2Relevant academic research and scientific papers
DEHYDROCONDENSATION OF ORGANIC HYDROSILANES WITH SILANOLS. PART II. EFFECT OF SILOXANE CHAIN LENGTH ON THE REACTIVITY OF SI-H END-GROUPS. THE SUBSTITUTION EFFECT
Chrusciel, Jerzy,Lasocki, Zygmunt
, p. 121 - 128 (2007/10/02)
It has been found that the reactivity of Si-H end-groups in the homologous series of α,-dihydropolidimethylsiloxanes H(Me2SiO)nSiMe2H in their reaction with diphenylsilanediol in DMF and in presence of ZnCl2 decreases for n changing from 1 to 3 and is stabilized for larger n.The substitution effect of a single Si-H group in 1,1,3,3-tetramethyldisiloxane by triphenylsilanol was determined from rate measurements of the reaction of the primary product of condensation: 1,1,3,3-tetramethyl-5,5,5-triphenyltrisiloxane, which was prepared independently.A kinetic model of non-equilibrium polycondensation proceeding with a single reactivity change of a functional group was devised and numerically checked.
