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ATRP of N ‐Hydroxyethyl Acrylamide in the Presence of Lewis Acids: Control of Tacticity, Molecular Weight, and Architecture
Author(s) -
Sun Yue,
Fu Liye,
Olszewski Mateusz,
Matyjaszewski Krzysztof
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800877
Subject(s) - tacticity , polymer chemistry , dispersity , atom transfer radical polymerization , copolymer , acrylamide , polymerization , materials science , lewis acids and bases , chemistry , polymer , organic chemistry , catalysis
Good control of tacticity, molecular weight, and architecture is attained via atom transfer radical polymerization (ATRP) of N ‐hydroxyethyl acrylamide (HEAA), in a one‐pot process in the presence of Y(OTf) 3 . The effect of temperature, ratio of [Y(OTf) 3 ]/[HEAA], and ATRP procedure on the tacticity and degree of control over the polymerization is investigated in detail. Under optimal conditions, using photo ATRP and 15% Y(OTf) 3, the content of meso dyads ( m ) can be increased from 42% to 80% in a homopolymer with a dispersity D = 1.22. Well‐defined stereoblock copolymers, atactic‐ b ‐isotactic poly(HEAA), with D = 1.27, are obtained by adding Y(OTf) 3 at a specific conversion, initially started without Y(OTf) 3 .