Preparation and modification of itaconic anhydride-methyl methacrylate copolymers

Abstract

The free radical copolymerisation of itaconic anhydride and methyl methacrylate in solution was studied at 60 C. The copolymer composition was determined by H-1-NMR spectroscopy and the obtained monomer reactivity ratios were calculated, r(ITA) = 1.35 +/- 0.11; r(MMA) = 0.22 +/- 0.22 (by the Fineman-Ross method) and r(ITA) = 1.27 +/- 0.38; rMMA = 0.10 +/- 0.05 (by the Mayo-Lewis method). The synthesised copolymers were modified by reaction with di-n-butyl amine. The copolymer composition after amidation was determined by elemental analysis via the nitrogen content. Amidation of the anhydride units in the copolymers with di-n-butyl amine resulted in complete conversion to itaconamic acid.

Ispitivana je radikalna kopolimerizacija anhidrida itakonske kiseline i metil-metakrilata u rastvoru na 60 °C. Sastav kopolimera određen je 1H-NMR spektroskopijom i izračunati su odnosi reaktivnosti monomera, rITA = 1.35±0.11; rMMA = 0.22±0.22 (metodom Fajnman-Ros) i rITA = 1.27±0.38; rMMA = 0.10±0.05 (metodom Mejo-Luis). Sintetizovani kopolimeri su modifikovani reakcijom sa dibutil-aminom. Nakon amidacije sastav kopolimera određen je elementalnom analizom na osnovu sadržaja azota. Amidacijom anhidridnih jedinica u kopolimerima dibutil-aminom nastale su komonomerne jedinice itakonamične kiseline.