The catalyst plays a vital role in organocatalyzed atom transfer radical polymerization (O‐ATRP). Catalysts in the ground‐state, excited‐state, and oxidized‐state are in competitive equilibrium and mutually transforming status. However, the ca...
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https://www.riss.kr/link?id=O113482519
2018년
-
0001-1541
1547-5905
SCI;SCIE;SCOPUS
학술저널
2581-2591 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
The catalyst plays a vital role in organocatalyzed atom transfer radical polymerization (O‐ATRP). Catalysts in the ground‐state, excited‐state, and oxidized‐state are in competitive equilibrium and mutually transforming status. However, the ca...
The catalyst plays a vital role in organocatalyzed atom transfer radical polymerization (O‐ATRP). Catalysts in the ground‐state, excited‐state, and oxidized‐state are in competitive equilibrium and mutually transforming status. However, the catalyst circulation process remains unclear in some respects. In this work, for the first time, a novel kinetic model is successfully developed to illustrate the exact circulation process and working mechanism of catalyst. For a broad range of conditions, the reported model presents excellent descriptions of kinetic behaviors of O‐ATRP. In the polymerization process, the photolysis effect contributes to a small proportion of radical generation. Sufficient deactivation effect is crucial for controlled polymerization at the early stage of polymerization. And increased light intensity, halide ion concentration, catalyst loading and initiator concentration accelerate the establishment of catalyst dynamic equilibrium. Additionally, the excited‐state catalyst quenches with an extremely high rate, leading to an immediate dormant period in “on–off” light switching regulation. The formulated results shed light on the catalyst circulation process and provide insights into the polymerization kinetics. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2581–2591, 2018
Issue information – table of contents
On the construction of binary mixture p‐x and T‐x diagrams from isochoric thermodynamics