Spontaneous copolymerization of phthalic anhydride with aziridine or 2-methylaziridine
✍ Scribed by S.A. Pooley; G.S. Canessa; B.L. Rivas
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 408 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Phthalic anhydride as an electrophihc monomer was copolymerized in the absence of initiator under various experimental conditions with aziridine or 2-methylaziridine as nucleophihc monomers. The copolymers by elemental analysis, i.r. and 'H-NMR spectroscopy were characterized and their specific viscosity was determined. The copolymer composition was determined by elemental analysis and compa:red with those obtained by 'H-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 'H-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 293473 K. Most copolymers are stable until 387 K.