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.

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.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

Published Version

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