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Diphenylphosphino Styrene‐Containing Homopolymers: Influence of Alkylation and Mobile Anions on Physical Properties
Author(s) -
Jangu Chainika,
Schultz Alison R.,
Wall Candace E.,
Esker Alan R.,
Long Timothy E.
Publication year - 2016
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.201600037
Subject(s) - styrene , alkylation , polymer chemistry , copolymer , materials science , chemistry , polymer science , organic chemistry , catalysis , polymer
Conventional free radical polymerization and post‐alkylation of 4‐diphenylphosphino styrene (DPPS) generate a new class of high‐molecular‐weight phosphonium‐containing homopolymers with tunable thermal, viscoelastic, and wetting properties. Post‐alkylation and subsequent anion exchange provide an effective method for tuning T g values and thermal stability as a function of alkyl chain length and counteranion selection (X − , BF 4 − , TfO − , and Tf 2 N − ). Rheological characterization facilitates the generation of time–temperature–superposition (TTS) pseudomaster curves and subsequent analysis of frequency sweeps at various temperatures reveals two relaxation modes corresponding to long‐range segmental motion and the onset of viscous flow. Contact angle measurements reveal the influence of counteranion selection on wetting properties, revealing increased contact angles for homopolymers containing nucleophilic counteranions. These investigations provide fundamental insight into phosphonium‐containing polymers, aiming to guide future research and applications involving electro‐active polymeric devices.