Synthesis and structure of poly[N-(2-hydroxyethyl)-ethyleneimine-co-3,4,5,6-tetrahydrophthalic anhydride]

The spontaneous copolymerization reaction in acetonitrile at 35 degrees C b y 48 h between N-(2-hydroxyethyl)ethyleneimine with 3,4,5,6-tetrahydrophtha lic anhydride under different experimental conditions was studied. The yiel d and molecular weight ranged between 57 - 78 % and 8.5 - 9.1 (.) 10(3) res pectively. The copolymer composition determined from H-1 NMR spectra demons trated that as decreases the concentration of HEEI units in the feed, decre ases the incorporation of HEEI units in the copolymer. According to the all spectroscopic data a copolymer structure was suggested. It considers the 3 ,4,5,6-tetrahydrophthalic anhydride units forming part either the backbone and the side chain,and the anhydride bonds are placed only in the side chai ns.