Ultrasonic depolymerization of the polyvinyl alcohol

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

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 language	English
Publication status	Published - 2000
MoE publication type	Not Eligible
Event	7th Meeting of the European Society of Sonochemistry - Biarritz-Guéthary, France Duration: 14 May 2000 → 18 May 2000

Conference

Conference	7th Meeting of the European Society of Sonochemistry
Country/Territory	France
City	Biarritz-Guéthary
Period	14/05/00 → 18/05/00

Keywords

chemicals
polymers
depolymerization
polyvinyl alcohol
ultrasound
ultrasonics
sonochemistry
aqueous solutions
degradation

Cite this

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title = "Ultrasonic depolymerization of the polyvinyl alcohol",

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.",

keywords = "chemicals, polymers, depolymerization, polyvinyl alcohol, ultrasound, ultrasonics, sonochemistry, aqueous solutions, degradation",

author = "Antti Gr{\"o}nroos and Juha Heikkinen and Jorma Ihalainen and Hannu Mursunen and Hannu Sekki",

year = "2000",

language = "English",

note = "7th Meeting of the European Society of Sonochemistry ; Conference date: 14-05-2000 Through 18-05-2000",

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TY - CONF

T1 - Ultrasonic depolymerization of the polyvinyl alcohol

AU - Grönroos, Antti

AU - Heikkinen, Juha

AU - Ihalainen, Jorma

AU - Mursunen, Hannu

AU - Sekki, Hannu

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

KW - chemicals

KW - polymers

KW - depolymerization

KW - polyvinyl alcohol

KW - ultrasound

KW - ultrasonics

KW - sonochemistry

KW - aqueous solutions

KW - degradation

M3 - Conference Abstract

T2 - 7th Meeting of the European Society of Sonochemistry

Y2 - 14 May 2000 through 18 May 2000

ER -

Ultrasonic depolymerization of the polyvinyl alcohol

Abstract

Conference

Keywords

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Cite this