Surface properties Characterization of Melamine Polyphosphate by Inverse Gas Chromatography

Chin J Mater Res

2008, Vol. 22

Issue (4): 353-356 DOI:

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Surface properties Characterization of Melamine Polyphosphate by Inverse Gas Chromatography

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东北林业大学

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;. Surface properties Characterization of Melamine Polyphosphate by Inverse Gas Chromatography. Chin J Mater Res, 2008, 22(4): 353-356.

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Abstract The surface properties of zinc modified melamine polyphosphate (Zn-MPP) and melamine polyphosphate (MPP) were analyzed by inverse gas chromatography (IGC) in this work.. Four n–alkanes (C6, C7, C8, and C9) were chosen as apolar probes to characterize the dispersive component of surface free energy. Trichloromethane (CHCl3), acetone, ether and tetrahydrofuran (THF) were chosen as polar probes to detect the Lewis acid–base parameters. It was found the dispersive component of free energy of zinc modified melamine polyphosphate (Zn-MPP) was 63.3, 61.9, 61.1, and 59.0 mJ/m2 at 100, 110, 120, and 130℃, respectively. And the dispersive component of free energy of melamine polyphosphate (MPP) was 52.9, 53.9, 55.8, and 56.5 mJ/m2 at 100, 110, 120, and 130℃, respectively. The Lewis acidic number Ka of the Zn-MPP was 0.44, and the basic number Kb was 1.02. And the Lewis acidic number Ka of the MPP was 0.24, and the basic number Kb was 0.96. The result means the Zn-MPP and MPP was a weak Lewis basic material. The Lewis acidic number Ka of the Zn-MPP is higher than the MPP. The ratio of Lewis acid–base numbers (Kb /Ka) of Zn-MPP is smaller than MPP.

Key words: melamine polyphosphate Acid–base properties Surface free energy IGC

Received: 30 October 2007

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