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One‐dimensional long‐range order of smectic‐ A elastomers with diverse crosslinking density
Author(s) -
Nishikawa Etsushi,
Finkelmann Heino
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19980401)19:4<181::aid-marc181>3.0.co;2-w
Subject(s) - materials science , instability , elastomer , destabilisation , range (aeronautics) , phase (matter) , composite material , polymer chemistry , scattering , condensed matter physics , optics , chemistry , organic chemistry , physics , mechanics , psychology , social psychology
The influence of crosslinking a smectic‐ A polysiloxane on the Landau‐Peierls instability is investigated by X‐ray scattering techniques. It is observed that the half value width of reflections at small angles increases with increasing crosslinking density, indicating a decrease of layer correlation. In this system, therefore, the crosslinking leads to a destabilisation of the smectic‐ A phase contrary to a polymethacrylate system. This fundamental property is obviously influenced by the chemical constitution of the crosslinking agent.