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Megadalton Macromolecules Made-to-Order in Minutes: A Highly Active Nanosphere Catalyst for Preparing High-Molecular Weight Polymers

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Title
Megadalton Macromolecules Made-to-Order in Minutes: A Highly Active Nanosphere Catalyst for Preparing High-Molecular Weight Polymers
Author(s)
Tang Tang; Sherilyn J. Lu; Guillermo Ahumada; Christopher W. Bielawski
Publication Date
2022-11
Journal
MACROMOLECULES, v.55, no.22, pp.9943 - 9950
Publisher
AMER CHEMICAL SOC
Abstract
A rhodium(I)-based polymer, [Rh2(cyclooctatetraene)-Cl2]n, was used as a heterogeneous catalyst to prepare stereoregular poly(phenylacetylene) under ambient conditions and within short periods of time. Ultrahigh-molecular weight polymers were obtained when silica and an amine were added to the reaction mixture. The additives promoted catalytic activity as the silica functioned as a support, while the amine induced the depolymerization of the polymer catalyst into its monomeric components. Kinetic analyses in conjunction with molecular weight measurements revealed that the polymerization reaction proceeded in a chain-growth fashion. The poly(phenylacetylene)s were analyzed using a series of tensile tests and found to be mechanically robust (sigma = 20.1 MPa and E = 2.0 GPa). Features intrinsic to the catalyst facilitated the realization of a novel "injection polymerization" method in which passing monomer through catalyst-loaded cartridges rapidly and conveniently afforded high-molecular weight polymer fibers.
URI
https://pr.ibs.re.kr/handle/8788114/12566
DOI
10.1021/acs.macromol.2c01284
ISSN
0024-9297
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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