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Supramolecular structures of poly( p ‐phenylenes) with oxyethylene side chains and their mixtures with lithium salts
Author(s) -
Lauter Ulrich,
Meyer Wolfgang H.,
Enkelmann Volker,
Wegner Gerhard
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981001)199:10<2129::aid-macp2129>3.0.co;2-s
Subject(s) - polymer chemistry , lithium (medication) , supramolecular chemistry , side chain , chemistry , materials science , organic chemistry , polymer , crystal structure , medicine , endocrinology
A series of poly( p ‐phenylenes) with linear and branched oxyethylene side chains was synthesized. Microphase separation in the solid state causes polymers with linear side chains to form supramolecular structures, which consist of main chain layers separated by an amorphous side chain matrix. If mixed with lithium salts such as lithium triflate (LiOTf) or lithium bis(trifluoromethanesulfone)imide (LiNTf), the polymers form solid solutions. The experimental data suggest that the layered structures undergo a one‐dimensional swelling in the direction perpendicular to the main chain layers when blended with LiOTf and that this salt is only incorporated into the side chain matrix. The observed melting point depression in polymer‐LiNTf mixtures is explained by the assumption that the salt species are incorporated both into the side chain and the main chain microphase.