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Mesophase structure of flexible‐chain polymers
Author(s) -
Antipov Evgenij,
Kuptsov Sergei,
Kulichikhin Valerij,
Tur Dzidra,
Plate Nikolaj
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890260109
Subject(s) - mesophase , polymer , differential scanning calorimetry , materials science , crystallography , melting point , mesogen , polymer chemistry , liquid crystal , chemistry , composite material , thermodynamics , liquid crystalline , physics , optoelectronics
A structure of polyethylene (PE) and poly[bis(2, 2,2‐trifluoroethoxy)phosphazene] (PPh) has been studied by means of the X‐ray diffraction technique, scanning electron microscopy and differential scanning calorimetry. The polymers under investigation are examples of the organic and inorganic mesophase flexible‐chain polymers not containing the mesogenic groups. When heated above the melting point both polymers form the condis crystal mesophase state which is stable in a wide temperature range. The PE mesophase reveals the pseudohexagonal structure, while the structure of mesophase PPh has some peculiarities arising from the sharp increase in the chain stiffness within a certain temperature range. The PPh mesophase structure is characterized by the perfect one‐dimensional long‐range order of the monomolecular layers and by the short‐range order only along the two other directions within the layer. This structure may be due to the difference between the interactions of the inorganic backbones and regularly alternating side trifluoro‐ethoxy groups.