Ultrasonic depolymerization of the polyvinyl alcohol

Antti Grönroos, Juha Heikkinen, Jorma Ihalainen, Hannu Mursunen, Hannu Sekki

    Research output: Contribution to conferenceConference AbstractScientific

    Abstract

    Most chemists regard sonochemistry as a relatively new branch of chemistry.However, applications of power ultrasound in polymer science date back to the 1930s when sonication of some natural polymers was discovered to reduct viscosity.After that ultrasonication has proved to be a very advantageous method for depolymerization of macromolocules because it simply reduces their molecular weight by splitting the most susceptible chemical bond without causing any changes in the chemical nature of the polymer.It is now well established that the prolonged exposure of solutions of macromolecules to high-energy ultrasonic waves produces a permanent reduction in the solution viscosity.The aim of the present work was to study the effect of ultrasonic input power, ultrasonic frequency and solution concentration on the degradation of polyvinyl alcohol in the aqueous solution.
    Original languageEnglish
    Publication statusPublished - 2000
    MoE publication typeNot Eligible
    Event7th Meeting of the European Society of Sonochemistry - Biarritz-Guéthary, France
    Duration: 14 May 200018 May 2000

    Conference

    Conference7th Meeting of the European Society of Sonochemistry
    CountryFrance
    CityBiarritz-Guéthary
    Period14/05/0018/05/00

    Keywords

    • chemicals
    • polymers
    • depolymerization
    • polyvinyl alcohol
    • ultrasound
    • ultrasonics
    • sonochemistry
    • aqueous solutions
    • degradation

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  • Cite this

    Grönroos, A., Heikkinen, J., Ihalainen, J., Mursunen, H., & Sekki, H. (2000). Ultrasonic depolymerization of the polyvinyl alcohol. Abstract from 7th Meeting of the European Society of Sonochemistry, Biarritz-Guéthary, France.