The synthesis and characterization of four methacrylate copolymers ob- tained by radical addition polymerization of methyl methacrylate as well as a new methacrylate azophenylbenzoxazole chromophore in percentages of 10, 30, 50, and 70% were explored. The copolymers were amorphous and showed glass-transition temperatures ranging from 132 to 146 °C. High-quality polymer films were easily obtained by spin coating from N-methylpyrrolidone solutions. Polymer films spun cast on iridium tin oxide (ITO) substrates were used in the electro-optic (EO) experiments to evaluate the EO coefficients r33 using the reflection technique. The measured values fell in the range of 1.7–3.7 pm/V (laser incident wavelength of 1.552 microns) depending on the percentage of chromophore in the polymer.
Synthesis and Electrooptic Properties of Side-Chain Methacrylate Polymers Containing a New Azophenylbenzoxazole Chromophore / T., Beltrani; M., Bosch; Centore, Roberto; S., Concilio; P., Gunter; A., Sirigu. - In: JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY. - ISSN 1099-0518. - STAMPA. - 39:(2001), pp. 1162-1168.
Synthesis and Electrooptic Properties of Side-Chain Methacrylate Polymers Containing a New Azophenylbenzoxazole Chromophore
CENTORE, ROBERTO;
2001
Abstract
The synthesis and characterization of four methacrylate copolymers ob- tained by radical addition polymerization of methyl methacrylate as well as a new methacrylate azophenylbenzoxazole chromophore in percentages of 10, 30, 50, and 70% were explored. The copolymers were amorphous and showed glass-transition temperatures ranging from 132 to 146 °C. High-quality polymer films were easily obtained by spin coating from N-methylpyrrolidone solutions. Polymer films spun cast on iridium tin oxide (ITO) substrates were used in the electro-optic (EO) experiments to evaluate the EO coefficients r33 using the reflection technique. The measured values fell in the range of 1.7–3.7 pm/V (laser incident wavelength of 1.552 microns) depending on the percentage of chromophore in the polymer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
