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The Effect of Hydrogen Bonding on Intramolecular Chain Transfer in Polymerization of Acrylates

✍ Scribed by Kun Liang; Robin A. Hutchinson

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
320 KB
Volume
32
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Propagation rate coefficients (k~p~) for 2‐hydroxyethyl acrylate (HEA) have been determined by pulsed‐laser polymerization (PLP) combined with size‐exclusion chromatography (SEC) between 20 and 60 °C using pulse repetition rates of 50 and 100 Hz. The success of PLP–SEC under these conditions suggests that HEA is not subjected to the intramolecular chain transfer to polymer (backbiting) reactions dominant for other acrylates; ^13^C NMR analysis shows that the quaternary carbon observed in PLP‐generated poly(butyl acrylate) (pBA) samples is not observed in pHEA. These results are related to H‐bonding in the system, as it is shown that the introduction of H‐bonding by addition of n‐butanol to BA suppresses backbiting, and the disruption of H‐bonding by addition of dimethylformamide to HEA leads to an increased level of backbiting.

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