The Effect of Hydrogen Bonding on Radical Semi-Batch Copolymerization of Butyl Acrylate and 2-Hydroxyethyl Acrylate
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Authors
Schier, Jan E. S.
Cohen-Sacal, David
Larsen, Owen R.
Hutchinson, Robin A
Date
2017-08
Type
journal article
Language
Keyword
branching , functional comonomer , hydrogen bonding , hydroxyethyl acrylate , radical copolymerization
Alternative Title
Abstract
The radical copolymerization of butyl acrylate (BA) and 2-hydroxyethyl acrylate (HEA) was investigated under batch and semi-batch operations, with a focus on the influence of hydrogen-bonding on acrylate backbiting. The effect of hydrogen bonding on HEA to BA relative incorporation rates during copolymerization, previously seen in low-conversion kinetic studies, was also observed under high-conversion semi-batch conditions. However, overall reaction rates (as indicated by free monomer concentrations), polymer molar masses, and branching levels did not vary as copolymer HEA content was increased from 0 to 40 wt % in the semi-batch system. In contrast, introduction of a H-bonding solvent, n-pentanol, led to an observable decrease in branching levels, and branching levels were also reduced in batch (co)polymerizations with HEA. These differences can be attributed to the low levels of unreacted HEA in the starved-feed semi-batch system.
Description
Final publication available at: http://dx.doi.org/10.3390/polym9080368
Citation
Schier, J., Cohen-Sacal, D., Larsen, O., & Hutchinson, R. (2017). The Effect of Hydrogen Bonding on Radical Semi-Batch Copolymerization of Butyl Acrylate and 2-Hydroxyethyl Acrylate. Polymers, 9(12), 368. doi:10.3390/polym9080368
Publisher
MDPI AG