ISSN:
0449-296X
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Cationic polymerization of the geometrical isomers of β-methylstyrene and anethole (p-β-methoxy-β-methylstyrene) was studied in order to clarify the relation between the geometrical structure of the α,β-disubstituted olefins and their monomer reactivities, subsequent to previous work. Polymerization was carried out in toluene or ethylene dichloride with stannic chloride at 0°C. trans-β-Methylstyrene was 1.3 to 1.5 times more reactive than cis-β-methylstyrene to the styrene carbonium ion; copolymerization between the trans and the cis isomers of β-methylstyrene showed little difference in monomer reactivity. By contrast, the cis anethole was 1.5-2.0 times more reactive than the trans, according to copolymerization between the two isomers together. The lower reactivity of the cis-β-methylstyrene could be explained by steric hindrance in the cis isomer, proposed by Overberger et al.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1968.150060704
