POLY(METHYL METHACRYLATE) CONTAINING PYRROLE MOIETIES IN THE SIDE-CHAINS

Two synthetic routes to copolymers 7 of methyl methacrylate (MMA) with 2-(N-pyrrolyl)ethyl methacrylate (PEMA, 11) are compared. Copolymeriz ation of MMA (4) with 2-bromoethyl methacrylate (BEMA, 3) leads to a p recursor copolymer 5. The reactivity ratios are close to unity (r(MMA) = 0,90, r(BEMA) = 0,92). The polymer-analogous reaction of 5 with N-p yrrolylpotassium (6) runs to 99% conversion of the BEMA units. The syn thesis of PEMA (11) is presented. The reactivity ratios of copolymeriz ation of this monomer (11) with MMA (4) are determined to r(MMA) = 1,0 5 and r(PEMA) = 1,65. Copolymers 7 are further characterized by H-1 nu clear magnetic resonance, infrared spectroscopy, gel-permeation chroma tography and differential scanning calorimetry.