• Login
    View Item 
    •   Home
    • Scholarly Contributions
    • Chemical Engineering, Department of
    • Polymers Research Group Technical Report Series
    • View Item
    •   Home
    • Scholarly Contributions
    • Chemical Engineering, Department of
    • Polymers Research Group Technical Report Series
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Chain Extended Poly(3—hydroxybutyrate) With Improved Rheological Properties and Thermal Stability, Through Reactive Modification in the Melt State

    Thumbnail
    View/Open
    QU-CHEE-PRG-TR-2015-017.pdf (1.318Mb)
    Date
    2015-10-04
    Author
    Kolahchi, Ahmad Rezaei
    Kontopoulou, Marianna
    Metadata
    Show full item record
    Abstract
    Branching and crosslinking of polyhydroxybutyrate (PHB) is accomplished for the first time through reactive modification in the melt state, using dicumyl peroxide (DCP) as the free-radical initiator and a tri-functional coagent, triallyl trimesate (TAM). The dynamic oscillatory rheological properties, as well as extensional viscosities provide strong evidence of branching and crosslinking, depending on the amounts of DCP and TAM. In addition to the significant increases in viscosity due to branching/crosslinking, coagent modified samples exhibit a significant increase in the crystallization temperature, indicative of a nucleating effect, accompanied by a decrease of crystal spherulite sizes. In addition, the solid-state storage modulus in DMTA experiments is 65% higher in formulations that contain high gel contents, whereas the glass transition temperature of the cured formulations is slightly lower. Coagent modified PHB exhibit a substantial improvement in the thermal stability, both in isothermal dynamic oscillatory temperature sweeps, as well as non-isothermal TGA experiments.
    URI for this record
    http://hdl.handle.net/1974/13774
    Collections
    • Polymers Research Group Technical Report Series
    Request an alternative format
    If you require this document in an alternate, accessible format, please contact the Queen's Adaptive Technology Centre

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us
    Theme by 
    Atmire NV
     

     

    Browse

    All of QSpaceCommunities & CollectionsPublished DatesAuthorsTitlesSubjectsTypesThis CollectionPublished DatesAuthorsTitlesSubjectsTypes

    My Account

    LoginRegister

    Statistics

    View Usage StatisticsView Google Analytics Statistics

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us
    Theme by 
    Atmire NV