ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The effect of liquid sulfur dioxide concentration on cationic copolymerization of styrene (M1) with methyl acrylate (M2) was carried out with the use of boron trifluoride-ether complex as a catalyst. The reaction was carried out at 0°C. The monomer reactivity ratios r1 and r2 increased with increase in liquid sulfur dioxide concentration, and r1 was changed from r1 = 0.30 at [liq. SO2]0 = 6.58 mole/l., to r1 = 1.50 at [liq. SO2]0 = 13.16 mole/l., but r2 was not changed. These facts indicated that reactivity of carbonium ion of styrene in the propagation step was increased with increasing liquid sulfur dioxide concentration. The relation between the overall rate of copolymerization and liquid sulfur dioxide concentration is the same as in the case of the cationic homopolymerization of styrene, and polymolecular contribution of liquid sulfur dioxide on the overall copolymerization is shown from these observations.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1964.100021002
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