Design and preparation of novel Diels–Alder crosslinking polymer and its application in NLO materials

• Published in: Journal of materials science. Materials in electronics 2017-06, Vol.28 (12), p.8480-8486
• Main Authors: Gao, Wu, Qin, Guangjiong, Liu, Jialei, Fedorchuk, Andrij A., Ozga, K., Kityk, I. V.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Crosslinking; Glass transition temperature; Infrared absorption; Materials Science; Optical and Electronic Materials; Optoelectronics; Polymers; Polymethyl methacrylate; Ultraviolet absorption
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-6569-3

Principally novel crosslinking nonlinear optical and optoelectronics system based on Diels–Alder reaction was designed. The copolymer of methyl methacrylate and anthracen-9-ylmethyl methacrylate (PMMA-AMA) was used as a host polymer; chromophore ETO was used as guest chromophore; chromophore ETO and N,N -(methylenediphenyl)bismaleimide were used as crosslinker. The thermodynamic property of crosslinking system studied by differential scanning calorimeter (DSC) showed us that the glass transition temperature was about 65 °C and the crosslinking temperature was varied between 80 and 120 °C The crosslinking reactive speed and effectiveness were studied by ultraviolet absorption and infrared absorption spectroscopy with spectral resoluiotn 1 cm −1 . These results have indicated that the cross linking process could be finished at 110 °C for 20 min. Surprisingly, such EO polymer showed us a large EO coefficient of about 96.3 pm/V at wavelength 1 µm and excellent long term stability about 85% with respect to its initial value and can be kept after 250 h of heating at 80 °C.