Synthesis and Morphology of High‐Molecular‐Weight Polyisobutylene–Polystyrene Block Copolymers Containing Dynamic Covalent Bonds

Incorporating dynamic covalent bonds into block copolymers provides useful molecular level information during mechanical testing, but it is currently unknown how the incorporation of these units affects the resultant polymer morphology. High‐molecular‐weight polyisobutylene‐b‐polystyrene block copol...

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Veröffentlicht in:Macromolecular rapid communications. 2022-12, Vol.43 (24), p.e2200487-n/a
Hauptverfasser: Mehringer, Kyle D., Davis, Brad J., Kemp, Lisa K., Ma, Guorong, Hunt, Samuel B., Storey, Robson F., Gu, Xiaodan, Thornell, Travis L., Wedgeworth, Dane N., Simon, Yoan C., Morgan, Sarah E.
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container_issue 24
container_start_page e2200487
container_title Macromolecular rapid communications.
container_volume 43
creator Mehringer, Kyle D.
Davis, Brad J.
Kemp, Lisa K.
Ma, Guorong
Hunt, Samuel B.
Storey, Robson F.
Gu, Xiaodan
Thornell, Travis L.
Wedgeworth, Dane N.
Simon, Yoan C.
Morgan, Sarah E.
description Incorporating dynamic covalent bonds into block copolymers provides useful molecular level information during mechanical testing, but it is currently unknown how the incorporation of these units affects the resultant polymer morphology. High‐molecular‐weight polyisobutylene‐b‐polystyrene block copolymers containing an anthracene/maleimide dynamic covalent bond are synthesized through a combination of postpolymerization modification, reversible addition–fragmentation chain‐transfer polymerization, and Diels–Alder coupling. The bulk morphologies with and without dynamic covalent bond are characterized by atomic force microscopy  and small‐angle X‐ray scattering, which reveal a strong dependence on annealing time and casting solvent. Morphology is largely unaffected by the inclusion of the mechanophore. The high‐molecular‐weight polymers synthesized allow interrogation of a large range of polymer domain sizes. High‐molecular‐weight (>100 kg mol−1) polyisobutylene‐b‐polystyrene block copolymers containing an anthracene/maleimide (Anth‐MI) dynamic covalent bond are synthesized through a combination of postpolymerization modification, reversible addition–fragmentation chain‐transfer polymerization, and Diels–Alder coupling. The bulk morphologies with and without dynamic covalent bond reveal a strong dependence on annealing time and casting solvent, but no influence of the Anth‐MI junction.
doi_str_mv 10.1002/marc.202200487
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1521-3927
language eng
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source Wiley Online Library
subjects Addition polymerization
Anthracene
Atomic force microscopy
Block copolymers
Bulk polymerization
Chemical bonds
Chemical synthesis
Copolymers
Covalence
Covalent bonds
dynamic covalent bonds
Interrogation
Mechanical properties
Mechanical tests
Morphology
Polyisobutylene
Polymers
Polystyrene
Polystyrene resins
selective solvents
self‐assembly
Weight
title Synthesis and Morphology of High‐Molecular‐Weight Polyisobutylene–Polystyrene Block Copolymers Containing Dynamic Covalent Bonds
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