Thermal Degradation Kinetics of a Linked Polyurethane Acrylate Film

    Volume 42, Issue 2 (March 2014)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 21 January 2014

    Page Count: 8


    Chen, Jianfu
    College of Chemistry and Chemical Engineering, Fuzhou Univ., Fuzhou Fujian,

    Dept. of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou Fujian,

    Zhang, Weiying
    College of Chemistry and Chemical Engineering, Fuzhou Univ., Fuzhou Fujian,

    Li, Xiao
    College of Chemistry and Chemical Engineering, Fuzhou Univ., Fuzhou Fujian,

    Chen, Yimin
    Dept. of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou Fujian,

    (Received 17 August 2012; accepted 8 August 2013)

    Abstract

    Linked polyurethane-acrylate (LPUA) emulsions with good stability were synthesized by seed swelling emulsion polymerization. We then investigated the thermal degradation process of the LPUA film by means of thermogravimetry-derivative thermogravimetry (TG-DTG) at different heating rates. It was shown that the heating rate had obvious influence on the thermal weight loss of LPUA. Both the starting and ending temperatures of decomposition shifted to a higher temperature with increased heating rate. The most probable kinetic parameters of decomposition were obtained from the Coats-Redfern integral equation and Achar differential equation. It was shown that the optimum mechanism functions of the decomposition reaction were 3D diffusion, spherical symmetry, D4, and deceleration type a–t curve. The thermal decomposition mechanism function of the LPUA film was f (α) = 3/2[(1−α)−1/3 − 1]−1; G (α) = (1 − 2α/3) − (1 − α)2/3.


    Paper ID: JTE20120251

    DOI: 10.1520/JTE20120251

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    Author
    Title Thermal Degradation Kinetics of a Linked Polyurethane Acrylate Film
    Symposium , 0000-00-00
    Committee D20