The kinetics of catalytic polymerisations. Part VIII. The constitution of polystyrene formed by di- and tri-chloroacetic acid catalysis | Health & Environmental Research Online (HERO)

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HERO ID

9087838

Reference Type

Journal Article

Title

The kinetics of catalytic polymerisations. Part VIII. The constitution of polystyrene formed by di- and tri-chloroacetic acid catalysis

Author(s)

Brown, CP; Mathieson, AR

Year

1957

Is Peer Reviewed?

Yes

Journal

Journal of the Chemical Society
ISSN: 0368-1769

Page Numbers

3620-3624

Language

English

DOI

10.1039/jr9570003620

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-37049056581&doi=10.1039%2fjr9570003620&partnerID=40&md5=fa498ffa3865639ff35183878cccbbe4
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Abstract

The constitution of polystyrene formed by di- and tri-chloroacetic acid catalysis in different environments has been studied chemically and by infrared spectroscopy. Each polymer molecule contains a terminal chloroacetate group, which is lost above 70° and on alkaline hydrolysis. Polymers of low molecular weight lose this group more readily. No exchange of hydrogen between water and the acid catalysts occurs, and no fragments from the solvents nitromethane, ethylene dichloride, and butyl bromide are incorporated in the polymer. The polymer contains a very small amount of unsaturation. The relation between the molecular weight of the polymer M and its intrinsic viscosity [η] in benzene solution is [η] = 5.2 × 10-5M.