Liquid crystals dispersed in thermosetting polymer matrices: molecular, morphological, and thermo-optical analysis

Mario Abbate; Pasquale Mormile; Pellegrino Musto; Lucia Petti; Giuseppe Ragosta; P. Villano

doi:10.1117/12.279311

13 October 1997 Liquid crystals dispersed in thermosetting polymer matrices: molecular, morphological, and thermo-optical analysis

Mario Abbate, Pasquale Mormile, Pellegrino Musto, Lucia Petti, Giuseppe Ragosta, P. Villano

Author Affiliations +

Proceedings Volume 3147, Nonlinear Optical Properties of Organic Materials X; (1997) https://doi.org/10.1117/12.279311
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A first molecular, morphological and thermo-optical characterisation of a new type of Polymer Dispersed Liquid Crystal (PDLC) is presented. The chemical and structural properties are investigated by transmission FT4R spectra. The photopolymerisation process is analysed with optical monitoring, in order to obtain the best curing conditions. An experimental study on the transmithvity as a function of the temperature shows a seff-transparency effect, which occurs near the phase transition. An interpretation of the experimental results in tenns of a nonlinearity of thermal origin is given, using the theory of nonlinear scattering in heterogeneous media. The temperature switch, obtained in such a condition, suggests the possibility of employing such a material to realise a new type of all-optical temperature sensors and open the horizon to a new class ofthermo-optical devices.

Citation Download Citation

Mario Abbate, Pasquale Mormile, Pellegrino Musto, Lucia Petti, Giuseppe Ragosta, and P. Villano "Liquid crystals dispersed in thermosetting polymer matrices: molecular, morphological, and thermo-optical analysis", Proc. SPIE 3147, Nonlinear Optical Properties of Organic Materials X, (13 October 1997); https://doi.org/10.1117/12.279311

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