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Transfer to Polymer and Long-Chain Branching in PLP–SEC of Acrylates

✍ Scribed by Patrice Castignolles

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
278 KB
Volume
30
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Pulsed laser polymerization (PLP) combined with size exclusion chromatography (SEC) is the method of choice for determining propagation rate coefficients. The influence of the long‐chain branching in PLP–SEC is investigated using multiple‐detection SEC and a recently developed method to detect long‐chain branching [P. Castignolles, R. Grab, M. Parkinson, M. Wilhelm, M. Gaborieau, Polymer 2009, 50, 2373.] While little or no long‐chain branching is detected in poly(n‐butyl acrylate), the error in relevant molecular weights of poly(2‐ethylhexyl acrylate) is large (30–100%) due to long‐chain branching. Possible variations of propagation rate coefficient with alkyl groups in alkyl acrylates or with the solvent have to be reconsidered.

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