Fibril formation during the flow of crystallizing polymers mixed with amorphous polymers using polyoxymethylene with copolyamide

Having relatively similar melt viscosities, polyoxymethylene (POM), and copolyamide (CPA) on mixing (over the entire range of composition) form mixtures which differ from the initial polymers in viscosity and elastic properties of melts. The type of viscosity-composition curve is determined by shear...

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Bibliographic Details
Published in:Polymer science USSR 1975, Vol.17 (6), p.1594-1604
Main Authors: Ablazova, T.I., Tsebrenko, M.V., Vinogradov, G.V., Yarlykov, B.V., Yudin, A.V.
Format: Article
Language:English
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Summary:Having relatively similar melt viscosities, polyoxymethylene (POM), and copolyamide (CPA) on mixing (over the entire range of composition) form mixtures which differ from the initial polymers in viscosity and elastic properties of melts. The type of viscosity-composition curve is determined by shear stress. For extruded mixtures a 3–10 fold swelling is observed in the flow after emerging from the capillary. Results are due to specific fibre formation, in which POM forms hundreds of thousands of ultra-thin fibres in the matrix of CPA, which are oriented along the axis during extrusion of these mixtures through a capillary.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(75)90327-5