SYNTHESIS AND CHARACTERIZATION OF ALPHA,OMEGA-FUNCTIONALIZED AND ALPHA-FUNCTIONALIZED HYDROGENATED POLYBUTADIENES - TELECHELIC AND SEMI-TELECHELIC AMINE AND PHOSPHITE TERMINATED POLYMERS

Polymers with terminal amine or phosphite groups (X) were synthesized from tosylated derivatives of hydrogenated alpha-hydroxy- and alpha, o mega-dihydroxy-poly-1,3-butadienes, produced by anionic techniques. Pr oducts are semi-telechelic and telechelic polymers with X = NH2 (5), N HPh (6), NHPr '' (7), NH(CH2)(3)NMe2 (8), O(CH2)(2)NH2 (9), O(CH2)(2)N H(CH2)(2)NH2 (10), NMe2 (13), OPO2C6H4 (14) of varying ethyl side-grou p content, controlled molar mass ((M) over bar(n) = 600-3000) and low polydispersity. Characterization of polymers by n.m.r. and i.r. spectr oscopy is reported, with comparative studies on short chain model syst ems. Thermal properties and viscosities have been investigated in rela tion to molar mass, backbone structure and terminal functionality; com parisons are made with related saturated and unsaturated systems, and with polymers containing terminal ionic functionalities, formed by alk ylation, protonation, or coordination with Cu(II), Ni(II) and Fe(III) chlorides. Effects of end-groups on variations in Tg, higher thermal t ransitions and on melt viscosities are discussed. Oxidation of phosphi te end-groups is also observed. (C) 1997 Elsevier Science Ltd.