Synthesis and physical properties of naphthalene based side chain LC

POLY 466

Gopal Coimbatore, gopal.coimbatore@tiehh.ttu.edu, Institute of Environmental and Human Health, Texas Tech University, Box 41163, Lubbock, TX 79409-1163 and BK. Sadashiva, sadashiv@rri.res.in, Raman Research Institute, C. V. Raman Avenue, 560 080 Bangalore, India.
The synthesis and thermal properties of two series of side chain liquid-crystalline polysiloxanes, incorporating naphthalene moiety in their core, are described. The ferroelectric polymers were synthesised by hydrosilylation of poly(hydrogen-methylsiloxane) with the monomers viz., w-alkene-naphthoic acid derivatives. The series differed in their core unit lengths and structure and dipole strengths and direction. Preliminary results of their liquid crystalline behaviour, investigated by optical polarising microscopy and differential scanning calorimetry and some physical studies are being reported. The polymers show smectic A (SA) and chiral smectic C (SC*) phases. Some interesting phase behaviour modification associated with polymer properties will be also be discussed.
 

Polymers and Liquid Crystals
6:00 PM-8:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007