Issue 14, 2020

Synthesis of multisegmented block copolymer by Friedel–Crafts hydroxyalkylation polymerization

Abstract

Multisegmented block copolymers (MSBCPs) were synthesized by acid-catalyzed Friedel–Crafts (F–C) hydroxyalkylation polymerization in a two-step process from a feedstock of commercially available or easily synthesized benzaldehyde (BA) derivatives and 1,4-dimethoxy benzene (DMB). Polymerizations of DMB with various BA monomers afforded a library of triarylmethane-backboned oligomers with nitro, fluoro, alkyl ester, dimethylamino and tert-butyl pendant functional groups. Using these oligomers as macromonomers in a subsequent F–C hydroxyalkylation polymerization under the same setup produced MSBCPs with tunable compositions of segments and high number-average molar mass ∼105 g mol−1. Glass transition temperatures (Tg) measured for the oligomers and MSBCP became tunable between 121.3 °C and 227.7 °C. Meanwhile, water contact angle measurements of the spin-coated membranes were compared and a pH-responsive MSBCP was synthesized to demonstrate switchable surface wettability and polarity.

Graphical abstract: Synthesis of multisegmented block copolymer by Friedel–Crafts hydroxyalkylation polymerization

Supplementary files

Article information

Article type
Paper
Submitted
06 Feb 2020
Accepted
04 Mar 2020
First published
05 Mar 2020

Polym. Chem., 2020,11, 2542-2549

Synthesis of multisegmented block copolymer by Friedel–Crafts hydroxyalkylation polymerization

T. Cuneo, X. Cao, L. Zou and H. Gao, Polym. Chem., 2020, 11, 2542 DOI: 10.1039/D0PY00197J

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