1,3-OXAZOLINE INTERMEDIATES IN REACTIVE PROCESSING APPLICATIONS .2. MULTIPHASE POLYMER BLENDS VIA IN-SITU CATIONIC MELT PHASE POLYMERIZATION OF 2-PHENYL-1,3-OXAZOLINE

2-Phenyl-1,3-oxazoline was injected into poly(ethene-co-methacrylic acid), containing 4,25 mol-% methacrylic acid units, at 225 degrees C. In the first stage, 2-phenyl-1,3-oxazoline reacted with carboxylic acid groups to form esteramide side chains via grafting reaction. In the second stage, 2-phenyl-1,3-oxazoline containing methyl 4-nitrobenzenesulfonate initiator was added to initiate in-situ cationic polymerization, yielding poly(N-benzoylethylenimine) as dispersed phase with 0,2-3,5 mu m average diameter. Morphological, mechanical and thermal properties of poly(ethene-co-methacrylic acid) blends, prepared by grafting combined with in-situ polymerization of 2-phenyl-1,3-oxazoline, were investigated.