Cationic copolymerization of 3-methyltetrahydrofuran and 3,3-dimethyloxetane: Structural study of the copolymers
✍ Scribed by J. Guzmáan; M. García; E. Riande
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 563 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0887-624X
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The copolymerization of 3,3-dimethyloxetane and oxetane has been studied in methylene chloride at 20 ~, with triethyloxonium tetrafluoroborate as initiator. The copolymerization reactivity parameters are rDMo~ = 0.95 and ro~ = 1.19. By means of 300 MHz IH-NMR spectroscopy, the microstructure of the
## Abstract The ^1^H and ^13^C NMR spectra of __cis__‐ and __trans__‐2,3‐dimethyloxetane have been re‐examined and the published NMR assignments shown to be in error.
Al~traet--Copolymers of 4-methylpentene-1 and styrene were prepared (TiCla-AliBu3, 70 °) and their structure investigated. Monomer reactivity ratios calculated from the copolymer compositions were found to be 3"92 and 0"98. Comparison of the i.r.-spectra of copolymers thus prepared and of isotactic