Synthesis and characterization of reactive ladderlike polyallylsilsesquioxane and polyvinylsilsesquioxane

Ordered reactive ladderlike polyallylsilsesquioxane (hereafter referred to as Allyl-T) and polyvinylsilsesquioxane (hereaftef VI-T) were synthesized v ia stepwise coupling polymerization. During this reaction, coupling agent p -phenyl enediamine (PDA) is supposed to act as a template which enables sil ane molecules to self-assemble through strong hydrogen-bonding interaction between SI-OH groups and N-H groups. The structure of the polymers was char acterized by IR, X-ray diffraction, DSC, GPC, H-1-NMR, C-13-NMR and Si-29-N MR. The data show that the two polymers have ordered ladderlike molecular s tructure. Hence, the stepwise coupling polymerization is suitable to synthe size ladderlike polysilsesquioxanes (LPSs) containing grafted reactive viny l-terminated groups. (C) 1999 Elsevier Science B.V. All rights reserved.