ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The relations between structure and isothermal, dielectric properties of poly(α-acetoxystyrene)s substituted in para position by —OCOCH3 (1a), —OCOCH2CH3 (1b), —OCOCH2CH2CH3 (1c), —OCOC6H5 (1d), —OCOCH2CH2Cl (1f) and —OCOOCH3 (1g) were studied. The dielectric constants, at 105 Hz and 20 ± 2°C, were found to be: 3,79 (1a), 3,36 (1b), 3,18 (1c), 3,51 (1d), 3,36 (1e), 3,65 (1f) and 3,07 (1g). The polymers 1a-1g do not show any α- or β-transition. Increasing bulkiness of the para substituent gives rise to a decreasing dielectric constant due to an increase of the degree of syndiotacticity, as determined from 1H and 13C NMR spectra.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1985.021860719
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