Abstract
Phthalic anhydride as an electrophilic monomer was copolymerized in the absence of initiator under various experimental conditions with aziridine or 2-methylaziridine as nucleophilic monomers. The copolymers by elemental analysis, i.r. and 1H-NMR spectroscopy were characterized and their specific viscosity was determined. The copolymer composition was determined by elemental analysis and compared with those obtained by 1H-NMR spectroscopy. Aziridine or 2-methylaziridine is incorporated preferentially in the copolymer when the feed ratio is richest in the nucleophilic monomer. According to the copolymer composition, the i.r. and the 1H-NMR spectra information, it was possible to suggest a copolymer structure. The MAz/PhAn copolymers have lower molecular weight than those Az/PhAn copolymers. The thermal degradation of the Az/PhAn and MAz/PhAn copolymers have been investigated using thermogravimetry in the temperature range 293–673 K. Most copolymers are stable until 387 K.
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