Thermotropic elastomers with poly(oxy-1,4-butanediyl) units in the main chain

The paper describes the synthesis of thermotropic elastomers from trimellitimide‐terminated poly(oxy‐1,4‐butanediyl) [synonyms: poly(tetramethylene ether glycol), PTMG; poly(tetrahydrofuran), poly(THF)] and acetoxy group‐terminated rigid blocks. Copolyester imides are formed by transesterification p...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 1994-07, Vol.195 (7), p.2633-2651
Main Authors: Pospiech, Doris, Komber, Hartmut, Voigt, Dieter, Häußler, Liane, Meyer, Evelin, Schauer, Gottfried, Jehnichen, Dieter, Böhme, Frank
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:The paper describes the synthesis of thermotropic elastomers from trimellitimide‐terminated poly(oxy‐1,4‐butanediyl) [synonyms: poly(tetramethylene ether glycol), PTMG; poly(tetrahydrofuran), poly(THF)] and acetoxy group‐terminated rigid blocks. Copolyester imides are formed by transesterification polycondensation in the melt. According to 13C NMR investigations, their chain sequence distribution is characterized by a block‐like structure in which the preformed rigid units are partially exchanged by transesterification reactions during the melt polycondensation. The degree of transesterification depends on the reaction time. The influence of the length of the flexible PTMG units and of the concentration of rigid units on the phase behaviour as well as on the thermal behaviour and the dynamic‐mechanical behaviour of the block copolymers is discussed with respect to aromatic model compounds.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.1994.021950731