Journal article
Alkylborane initiated RAFT polymerization: impact of carboxylic acid deblockers
Polymer chemistry, v 14(24), pp 2872-2877
28 Jun 2023
Abstract
In this report, we explore the role of carboxylic acid deblockers in an oxygen tolerant, room temperature, and alkylborane initiated reversible addition-fragmentation chain transfer (AI-RAFT) polymerization. Our studies employ an air-stable and coordinated trialkylborane-amine complex as the initiator which upon exposure to deblocker liberates free alkylborane that consumes oxygen and generates radicals to drive RAFT polymerization. Kinetic experiments reveal an enhancement in the polymerization rate when using higher concentrations of propionic acid deblocker and that the carboxylic acid has a partial order of one, aligning with the homolytic substitution mechanism for the autoxidation of alkylboranes. Different carboxylic acid deblockers were also investigated by their relative pK(a) values, showing that lower pK(a) acids can be employed at greatly diminished concentrations while still providing high monomer conversions, predetermined molecular weights, and narrow dispersity polymers. The findings disclosed in this report provide important kinetic parameters, mechanistic insights, and formulation details which are instrumental in understanding and improving AI-RAFT.
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Details
- Title
- Alkylborane initiated RAFT polymerization: impact of carboxylic acid deblockers
- Creators
- Olivia R. Wilson - Drexel UniversityAndrew J. D. Magenau - Drexel University
- Publication Details
- Polymer chemistry, v 14(24), pp 2872-2877
- Publisher
- Royal Soc Chemistry
- Number of pages
- 6
- Grant note
- 59903-DNI7 / American Chemical Society's Petroleum Research Fund; American Chemical Society American Scandinavian Fellowship Koerner Family Commonwealth of Pennsylvania, Department of Community and Economic Development
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000999429200001
- Scopus ID
- 2-s2.0-85162149640
- Other Identifier
- 991020633164004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Polymer Science