Synthesis of segmented poly(ether urethane)s and poly(ether urethane urea)s incorporating various side-chain or backbone functionalities

摘要

A series of linear and branched functionalized high-molecular-weight segmented poly (ether urethane)s and poly(ether urethane urea)s were prepared by chain-extending isocyanate prepolymers based on poly(tetramethylene oxide) with molecular weight 1000 and 4,4 '-diphenylmethane diisocyanate. Different functional groups were incorporated within the polymer backbone or on side-chains by using several chain extenders during the synthesis: glycerol, 2,2-bis (hydroxymethyl) propionic acid, 1H,1H,2H,3H,3H-perfluoroundecane-1,2-diol, 1H,1H,8H,8H-dodecanefluoro-1,8-octanediol, 1,3-diamino-2-hydroxypropane and 3,5-diaminobenzoic acid, using the method of gradual approach to stoichiometry. In some cases, pendant functional groups were used as reactive sites for the further attachment of side groups. Polymers were characterized using H-1-NMR and FT-IR spectroscopies and GPC in conjunction with chemical structural confirmation by a model compound comparison study of 4,4 '-diphenylmethane diisocyanate or trifluoro-p-tolyl isocyanate reacted with 1,3-diamino-2-hydroxypropane and 1,4-butanediol.