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Proceedings Paper

Liquid crystals dispersed in thermosetting polymer matrices: molecular, morphological, and thermo-optical analysis
Author(s): Mario Abbate; Pasquale Mormile; Pellegrino Musto; Lucia Petti; Giuseppe Ragosta; P. Villano
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Paper 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.

Paper Details

Date Published: 13 October 1997
PDF: 7 pages
Proc. SPIE 3147, Nonlinear Optical Properties of Organic Materials X, (13 October 1997); doi: 10.1117/12.279311
Show Author Affiliations
Mario Abbate, Institute of Research and Technology of Plastic Materials (Italy)
Pasquale Mormile, Institute of Cybernetics (Italy)
Pellegrino Musto, Institute of Research and Technology of Plastic Materials (Italy)
Lucia Petti, Institute of Cybernetics (Italy)
Giuseppe Ragosta, Institute of Research and Technology of Plastic Materials (Italy)
P. Villano, Institute of Research and Technology of Plastic Materials (Italy)


Published in SPIE Proceedings Vol. 3147:
Nonlinear Optical Properties of Organic Materials X
Mark G. Kuzyk, Editor(s)

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