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Hydrophilic elastomer containing poly(tetrahydrofuran) segments and viologen units
Author(s) -
Kohjiya Shinzo,
Hashimoto Tamotsu,
Yamashita Shinzo
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070440320
Subject(s) - ultimate tensile strength , elastomer , materials science , swelling , polymer , tetrahydrofuran , cationic polymerization , composite material , thermoplastic elastomer , polymer chemistry , polymerization , modulus , chemical engineering , chemistry , copolymer , organic chemistry , solvent , engineering
Elastomeric polymer consisting of poly(oxytetramethylene) segments and viologen units was prepared by living cationic polymerization of tetrahydrofuran (THF), followed by the end capping of the living polymer by 4,4´‐bipyridine. The obtained ionene‐type polymer (PTV) exhibited low tensile modulus and high tensile strength with large extensibility, i.e., it is an excellent elastomer from its mechanical properties. The water swelling behavior and effects of water and the sort of counter anions on the tensile properties of PTV were investigated. PTV showed high hydrophilicity; e.g., the water content of PTV with bromide counter anions was ca. 40% after swelling in water at 25°C for 24 h. However, even for the samples with such a high water content, PTVs displayed good elastomeric properties, although the tensile modulus and tensile strength were decreased with increase of water content. The hydrophilicity of PTV was found to depend on the kind of counter anions, which in turn determined the tensile properties of PTVs in a swollen state.