Studies on Fibrillation in Polymer Films I. Mechanism of Fibrillation in Poly (Vinyl Alcohol) Films

The effects of draw ratio, degree of polymerization, birefringences, degree of crystalliza-tion, and tear energy on the fibrillation of PVA filmswere studied by a fibrillating testmachine, and the cause of fibrillation was deduced from the results of the observationswith optical and electron microsc...

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Bibliographic Details
Published inKobunshi Kagaku Vol. 27; no. 307; pp. 769 - 774
Main Authors Nagano, Masamitsu, Yano, Tsutomu
Format Journal Article
LanguageJapanese
Published The Society of Polymer Science, Japan 25.11.1970
Subjects
Degree of Fibrillation
Draw ratio
Fibrillating Mechanism
Fibrillation of Film
Void Deformation
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Summary:The effects of draw ratio, degree of polymerization, birefringences, degree of crystalliza-tion, and tear energy on the fibrillation of PVA filmswere studied by a fibrillating testmachine, and the cause of fibrillation was deduced from the results of the observationswith optical and electron microscopes as follows. 1st step. Development of microvoids by drawing and crystallization. 2nd step. Deformation of voids by drawing. 3rd step. Connection of these voids by cracking at their ends. The following equation. relating the degree of fibrillation (Fn) to the draw ratio of PVAfilm (V) was obtained by taking the deformation of voids into consideration: Fn: degree of fibrillation V: draw ratio C1C2: constants The experimental data for PVA films were in a good agreement with the above equation.
ISSN:0023-2556
1884-8079
DOI:10.1295/koron1944.27.769