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Synthesis, Phase Behaviour and Mechanical Properties of Poly(2‐methyl‐1,3‐propanediol‐4,4′‐bibenzoate)
Author(s) -
FernándezBlázquez Juan P.,
Bello Antonio,
Pérez Ernesto
Publication year - 2007
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/macp.200700364
Subject(s) - mesophase , amorphous solid , phase (matter) , quenching (fluorescence) , materials science , isotropy , deformation (meteorology) , glass transition , perpendicular , crystallography , polymer chemistry , liquid crystal , composite material , chemistry , polymer , organic chemistry , optics , physics , geometry , mathematics , fluorescence , optoelectronics
The synthesis and phase behaviour of PB32 is reported. The results indicate that PB32 develops a low‐ordered smectic mesophase of the type SmC alt . The slow formation of such a mesophase allows the quenching of the isotropic melt into an amorphous state so that both amorphous glass and smectic glass can be obtained, which exhibit different glass‐transition temperatures. Mechanical tests indicate that the macromolecular chains in the mesophase of PB32 can be oriented either parallel or perpendicularly in relation to the streching direction, depending on the deformation conditions. Solid‐state 13 C NMR spectroscopy results show that the mobility of the chains is rather similar in both phases.