Molecular weight dependence of some rheo
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G. Marchionni; G. Ajroldi; G. Pezzin
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Article
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1988
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Elsevier Science
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English
β 443 KB
The glass transition temperatures and the viscosities (over a very large temperature range) have been measured as a function of molecular weight, for two different series of perfluoropolyethers. The results have been interpreted according to well-known free-volume models. The Williams--Landel and Fe