Campus Units
Chemical and Biological Engineering
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
9-10-2019
Journal or Book Title
Macromolecules
DOI
10.1021/acs.macromol.9b00707
Abstract
In this article, we extend the understanding of gelation suppression in reversible addition–fragmentation chain-transfer (RAFT) polymerization in systems with long primary chains and high crosslinker content, regimes which have been mostly overlooked to date. Using a model methacrylate system, the gel point, apparent propagation rate constants, and polymer architectures are seen to vary in a systematic fashion. By combining our experimental data with several related studies, we introduce a new phenomenological parameter, the “crosslinking tendency,” that incorporates monomer concentration and excess functionality to universally describe the gelation suppression in both RAFT- and atom-transfer radical polymerization (ATRP)-controlled radical polymerization systems. The ability of the crosslinking tendency to quantitatively account for a broad range of RAFT and ATRP systems suggests that factors such as monomer architecture and details of activation/deactivation mechanisms may play only a secondary role in gel-point suppression.
Copyright Owner
American Chemical Society
Copyright Date
2019
Language
en
File Format
application/pdf
Recommended Citation
Lin, Fang-Yi; Yan, Mengguo; and Cochran, Eric W., "Gelation Suppression in RAFT Polymerization" (2019). Chemical and Biological Engineering Publications. 390.
https://lib.dr.iastate.edu/cbe_pubs/390
Comments
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Macromolecules, copyright © American Chemical Society after peer review. To access the final edited and published work see DOI: 10.1021/acs.macromol.9b00707. Posted with permission.