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Hyperbranched Multicyclic Polymer Built from Tailored Multifunctional Monocyclic Prepolymer
Author(s) -
Liu Chao,
Xu Wen,
Zhang HuaLong,
Pan CaiYuan,
Hong ChunYan
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.201900164
Subject(s) - gel permeation chromatography , polymer , chain transfer , polymer chemistry , polymerization , size exclusion chromatography , materials science , polystyrene , multiangle light scattering , azide , prepolymer , radical polymerization , chemistry , light scattering , polyurethane , organic chemistry , composite material , scattering , physics , optics , enzyme
A simple and efficient method to construct a hyperbranched multicyclic polymer is introduced. First, a tailored trithiocarbonate with two terminal anthracene units and three azide groups is successfully synthesized, and this multifunctional trithiocarbonate is used as chain transfer agent (CTA) to afford anthracene‐telechelic polystyrene (PS) via reversible addition‐fragmentation chain transfer (RAFT) polymerization. After that, linear PS is irradiated under 365 nm UV light to achieve the cyclization process. The monocyclic polymer further reacts with sym ‐dibenzo‐1,5‐cyclooctadiene‐3,7‐diyne via “A 2 +B 3 ” strategy based on a self‐accelerating click reaction to produce hyperbranched multicyclic polymer. The structures and properties of the polymers are characterized by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), UV–vis spectrophotometry, and triple‐detection size‐exclusion chromatography (TD‐SEC). The number of monocyclic units of the resultant hyperbranched multicyclic polymer reaches about 21 based on multi‐angle laser light scattering (MALLS) measurements. The plot of intrinsic viscosity versus molecular weight reveals that the α value of the unique hyperbranched multicyclic polymer is lower than both hyperbranched polymers and cyclic polymers.