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Your search keyword '"Pan, Xiangqiang"' showing total 11 results
Start Over Author "Pan, Xiangqiang" Journal macromolecular rapid communications
11 results on '"Pan, Xiangqiang"'

3. Visual Ozone Sensor: Structural Color Change of Pendant Selenium‐Containing Maleimide Polymers via Oxidation.

Author

Li, Qilong, Liu, Shaoxiang, Li, Jiajia, Pan, Xiangqiang, Zhu, Jian, and Zhu, Xiulin

Subjects
COLOR change sensors, SELENIDES, FOURIER transform infrared spectroscopy, POLYMERS, GEL permeation chromatography, NUCLEAR magnetic resonance
Abstract

Pendant selenium‐containing maleimide polymers with different selenium contents are synthesized via a radical copolymerization of styrene and N‐butylmaleimide phenyl selenide. The polymer structures are characterized by nuclear magnetic resonance, gel permeation chromatography, Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, and scanning electron microscopy with an energy‐dispersive spectrometer, which results in the desired structures and selenium contents. The refractive indices of the polymers, which change as a function of different contents of selenium and oxidative stimuli by H2O2 or O3, are investigated. Finally, a photonic crystal (PC) is prepared based on the selenium‐containing polymer. The visible color changes of the PC are investigated as a function of different concentrations and contact times of O3. [ABSTRACT FROM AUTHOR]

Published
2021
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9. Visible Light-Induced Living Radical Polymerization of Butyl Acrylate: Photocatalyst-Free, Ultrafast, and Oxygen Tolerance.

Author

Li, Jiajia, Ding, Chunlai, Zhang, Zhengbiao, Pan, Xiangqiang, Li, Na, Zhu, Jian, and Zhu, Xiulin

Subjects
VISIBLE spectra, POLYMERIZATION, ACRYLATES, PHOTOCATALYSTS, LIGHT emitting diodes
Abstract

Butyl acrylate is polymerized in the living way under the irradiation of purple light-emitting diode (LED) or sunlight without photocatalyst at ambient temperature. 2-((Phenoxycarbonothioyl)thio) ethyl propanoate) is exclusively added and acted as an initiator and a chain transfer agent simultaneously in the current system. Poly(butyl acrylate) with well-regulated molecular weight and relatively narrow molecular weight distribution ( Ð < 1.30) is synthesized. High conversion (>95%) can be achieved within several minutes. Polymerization shows oxygen tolerance. Near quantitative end-group fidelity of polymer is demonstrated by 1H NMR and matrix-assisted laser desorption/ionization time-of-flight mass spectra. [ABSTRACT FROM AUTHOR]

Published
2017
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