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Thermal stability of quaternary ammonium salts used as chargecontrol agents as viewed from their crystal structure

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Quaternary ammonium salts are well-known charge-control agents (CCAs) used widely in electrophotography. Aside from the CCA performance, a high thermal stability is also required because pulverized toners are prepared by kneading CCA with various toner components at 130-180 °C. Therefore, thermal stability has been studied in the present investigation in various quaternary ammonium salts with naphtholsulfonates in terms of structure analysis as well as IR spectra. As a result, the anions are found to play the key role in raising the melting point due to the formation of intermolecular OHO hydrogen bonds between the OH group of one anion and the sulfonic O atom of the neighboring one. The hydrogen bonds bridge anions either in the form of a onedimensional chain or a dimer.

Document Type: Research Article

Publication date: January 1, 2008

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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