𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Copolymerization of oxetane with 3,3-dimethyloxetane-I. Reactivity parameters and microstructure of the copolymers

✍ Scribed by Marc Bucquoye; Eric J. Goethals

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
297 KB
Volume
14
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

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 copolymers could be analyzed in terms of triad abundances. The observed values are in good agreement with the values calculated from the reactivity parameters thus showing the absence of penultimate effects and of re-distribution of the structural units in the copolymers. The results demonstrate that Ox is more reactive than DMOx to either of the two growing species in the copolymerization.

πŸ“œ SIMILAR VOLUMES

Copolymerization of 4-methylpentene-1 an
Copolymerization of 4-methylpentene-1 and styrene with TiCl3 and iBu3Al and the copolymer structure
✍ Yu.V. Kissin; Yu.Ya. Goldfarb; B.A. Krentsel; Ho Uyliem πŸ“‚ Article πŸ“… 1972 πŸ› Elsevier Science 🌐 English βš– 663 KB

Al~traet--Copolymers of 4-methylpentene-1 and styrene were prepared (TiCla-AliBu3, 70 Β°) 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

Living copolymerization of octadecyl vin
Living copolymerization of octadecyl vinyl ether with isobutyl vinyl ether: copolymerization parameters and crystallization behaviour of the copolymers
✍ Zhang, Xiaochun; Reyntjens, Wouter; Goethals, Eric J πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 79 KB πŸ‘ 1 views

Cationic copolymerization of octadecyl vinyl ether (ODVE) with isobutyl vinyl ether (IBVE) under reaction conditions leading to living vinyl ether polymerization has been studied. The experimental results show that, under such conditions, the living nature of the copolymerization can be retained. Th