Synthesis of Soluble Poly(Divinylbenzene) with an End‐Functional Group

Abstract

AbstractSynthetic methods of end‐functional soluble poly(divinylbenzene) [poly(DVB)] and A‐B‐A type block copolymers having soluble poly(divinylbenzene) segments were investigated. Lithium N,N′‐bis(trimethylsilyl) ethylenediamine was found to initiate an anionic polymerization of 1,4‐divinylbenzene (DVB) to form soluble polymer having one N,N′‐bis (trimethylsilyl) ethylenediamine moiety at the end of polymer chain almost quantitatively. The polymer was easily converted to primary‐amino‐ended soluble poly(DVB) by treating with tetrabutylammonium fluoride. Lithiated trimethylallylsilane also had an initiation ability for DVB polymerization. When the polymerization was carried out by lithiated trimethylallylsilane, in the presence of diisopropylamine, a soluble polymer was formed. The polymer obtained had one terminal organosilyl group and reactive pendent vinyl group in each monomeric unit. A‐B‐A Type tri‐block copolymer was synthesized through reactions between primary‐amino‐ended soluble poly (DVB) and α,ω‐bis‐primary‐amino‐ended silicone using 4,4′‐diphenylmethanediisocyanate as coupling agent. The resulting polymer was a multi‐functional polymer having poly (DVB) segments and silicone segments.