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    ARTICLE

    A Study on the Effect of Reaction Parameters on Viscosity and Molecular Weight of Hexafluoropropylene (HFP) based Perfluoropolyethers (PFPEs)

    SAURABH SAXENAa, PRATEEK MALIKa, GEETHA SESHADRIa,*, AJAY K. TYAGIa, UTTAM KUMAR MANDALb

    Journal of Polymer Materials, Vol.36, No.1, pp. 39-51, 2019, DOI:10.32381/JPM.2019.36.01.4

    Abstract Medium molecular weight liquid perfluoropolyethers (840 u to 1372 u) were synthesized by photopolymerization of hexafluoropropylene (HFP) in the presence of oxygen. Effects of various reaction parameters such as temperature, pressure, UV wattage and reaction time on yield, viscosity and molecular weight of PFPEs were studied. Out of all the parameters, the effect of reaction temperature was found the most significant on molecular weight of PFPEs. By increasing reaction temperature, viscosity and molecular weight of PFPEs where decreased. By increasing the wattage of the lamp, viscosity and molecular weight of PFPEs where also decreased. PFPEs More >

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