Monomer sequence distribution in butene/propylene copolymers by 13C nuclear magnetic resonance
β Scribed by A. Bunn; M.E.A. Cudby
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 225 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
Ethylene sulphide-propylene sulphide copolymers, prepared with anionic type catalysts, have been investigated by t3C NMR. The peaks have been assigned both in terms of diad and triad monomer sequences and in terms of tacticity. It has been shown that the propylene sulphide monomer units were directi
The methods for sequencing ethylene-propylene copolymers (EPMs) by 13 C-NMR were extended to account for third monomer effects. The equations for calculating the ethylene content and monomer sequence distribution in EPMs were corrected for the presence of the third monomers 1,4 hexadiene, 2-ethylide
## Abstract Copolyesters with different stoichiometric compositions, obtained from 1,4βbutanediol, adipic acid, and terephthalic acid by moltenβstate polycondensation, are studied by means of high resolution ^13^C NMR spectroscopy with respect to copolymer composition and block length distribution.