Synthesis and characterization of liquid crystalline polysiloxanes containing benzyl ether mesogens
- 1 October 1987
- journal article
- research article
- Published by Wiley in Journal of Polymer Science Part A: Polymer Chemistry
- Vol. 25 (10) , 2909-2923
- https://doi.org/10.1002/pola.1987.080251024
Abstract
Side chain liquid crystalline polysiloxanes were synthesized by the hydrosilation of poly(methylhydrosiloxane) with p‐(1‐undecenyl‐11‐oxy) benzyl ethers of 4‐cyanophenol (IM), 4‐methoxyphenol (IIM), 4‐cyano‐4′‐hydroxybiphenyl (IIIM), 4‐methoxy‐4′‐hydroxybiphenyl (IVM), and 2‐cyano‐6‐hydroxynaphthalene (VM). The phase behavior of both monomeric and polymeric liquid crystals was characterized by differential scanning calorimetry and optical polarization microscopy. IM is a monotropic liquid crystal, IIM is crystalline, and IIIM and IVM are enantiotropic liquid crystals, whereas VM presents two virtual liquid crystalline transitions and crystalline polymorphism. All the synthesized polysiloxanes present enantiotropic smectic mesomorphism.Keywords
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