Sonochemical polymerization of diphenylmethane

Sonolysis of diphenylmethane (DPhM) has been studied under the effect of 20 kHz ultrasound (absorbed acoustic power 0.45 W/ml, surface area of sonotrode 1 cm 2, volume of sonicated solution 100 ml) under argon at 60 °C. The solid product of the sonolysis was characterized by elemental analysis, FTIR...

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Bibliographic Details
Published inUltrasonics sonochemistry Vol. 10; no. 1; pp. 11 - 15
Main Authors Nikitenko, S.I., Koltypin, Yu, Pickup, D.M., Van-Eck, E.R.H., Gedanken, A.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 2003
Subjects
Diphenylmethane
Polymerization
Ultrasound
Polymerization
Diphenylmethane
Ultrasound
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Summary:Sonolysis of diphenylmethane (DPhM) has been studied under the effect of 20 kHz ultrasound (absorbed acoustic power 0.45 W/ml, surface area of sonotrode 1 cm 2, volume of sonicated solution 100 ml) under argon at 60 °C. The solid product of the sonolysis was characterized by elemental analysis, FTIR, 13C MAS NMR, TGA/DSC, XRD and TEM techniques. It was found that the sonolysis of DPhM causes formation of the polymer with the composition similar to crosslinked polystyrene. Assumed mechanism of DPhM sonolysis consists of DPhM molecules dissociation inside the cavitating bubble. Secondary radical scavenging and radical recombination processes yields the sonopolymer in the liquid phase. The breakdown of the aromatic ring during DPhM sonolysis confirms that a very high temperature established in the cavitating bubble.
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ISSN:1350-4177
1873-2828
DOI:10.1016/S1350-4177(02)00102-5