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Effect of Chain Microstructure and Cooling Rate on Crystaf Calibration Curves: An Experimental Study

Authors

  • Punnawit Somnukguande,

    1. Center of Excellence for Petroleum, Petrochemicals and Advanced Materials (PPAM), Department of Chemical Engineering, Kasetsart University, 50 Phaholyothin Rd, Jatujak, Bangkok, Thailand 10900
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  • Siripon Anantawaraskul,

    Corresponding author
    1. Center of Excellence for Petroleum, Petrochemicals and Advanced Materials (PPAM), Department of Chemical Engineering, Kasetsart University, 50 Phaholyothin Rd, Jatujak, Bangkok, Thailand 10900
    2. Center for Advanced Studies in Nanotechnology and Its Applications in Chemical, Food and Agricultural Industries, Kasetsart University, Bangkok, Thailand 10900
    • Fax: (662) 561-4621
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  • João B.P. Soares

    1. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Abstract

Summary: Crystallization analysis fractionation (Crystaf) is a polymer characterization technique based on differences in chain crystallizabilities in a dilute solution during non-isothermal crystallization. Crystaf profiles, a weight distribution function of chains crystallized at each temperature, can be used to infer the chemical composition distribution (CCD) of copolymers when a Crystaf calibration curve, a relationship between peak crystallization temperature and average comonomer content, is known. In this investigation, the effect of the number average molecular weight, comonomer type, and cooling rate on Crystaf calibration curves were experimentally investigated. It was found that the cooling rate and comonomer type may strongly affect Crystaf calibration curves, while the influence of molecular weight is relatively subtle.

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