THERMAL-CHARACTERISTICS OF N-ANTIPYRYL-ACRYLAMIDE-ACRYLONITRILE COPOLYMERS USING DIFFERENT SPECTROSCOPIC TECHNIQUES

N-antipyryl-acrylamide monomer (NAA) (2,3-dimethyl-1-phenyl-5-oxo-3-py razolin acryloylamine) was copolymerized with acrylonitrile in dimethy l formamide using azobis-isobutyronitrile (AIBN) as initiator. The hom opolymer and also the copolymers were characterized by a variety of sp ectral and thermal methods. Thermogravimetry (TG) and differential the rmal analysis (DTA) data showed a remarkable improvement in the therma l behaviour of the investigated copolymers. A mechanism for the partic ipation of the acryl-oyloxy units in the nitrile oligomerization is pr oposed and confirmed by interpretation of the fragmentation patterns o f the mass spectrum of the N-antipyryl-acrylamide (NAA) monomer and al so the IR spectra of the copolymers after heating.