Ultrasonic characterization of the crystallization behavior of poly(ethylene terephthalate)

Authors

  • Lijuan Zhao,

    1. The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
    2. Industrial Materials Institute, National Research Council Canada, 75 de Mortagne Blvd., Quebec J4B 6Y4, Boucherville, Canada
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  • Zhigang Sun,

    1. Industrial Materials Institute, National Research Council Canada, 75 de Mortagne Blvd., Quebec J4B 6Y4, Boucherville, Canada
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  • Jacques Tatibouët,

    1. Industrial Materials Institute, National Research Council Canada, 75 de Mortagne Blvd., Quebec J4B 6Y4, Boucherville, Canada
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  • Shaoyun Guo

    Corresponding author
    1. The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
    • The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
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Abstract

On the basis of the previous observations that the ultrasonic signals are sensitive to the crystallization of polymers (Tatibouet and Piché, Polymer 1991, 32, 3147), we have expanded our efforts to study the detail relationship between the ultrasonic signals and crystallization process in this work. The nonisothermal and isothermal crystallization of virgin poly(ethylene terephthalate) (PET) and PET samples after degradation were studied by using a specially designed pressure-volume-temperature (PVT) device, with which an ultrasonic detector was combined. The results showed that the evolution of the ultrasonic signals not only can be used to probe the crystallization process but also can qualitatively characterize the crystallization rate, crystallinity, crystallite size, and amorphous. DSC measurement was used to verify such results. Ultrasonic signals could be as a complementary tool to polymer chain movement and well be applied to characterize the crystallization behavior. Furthermore, the ultrasonic measurement has the potential use to characterize crystallization of products in-line during processing (i.e., injection molding, micromoulding). © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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