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Please use this identifier to cite or link to this item: http://hdl.handle.net/11375/18563
Title: Melt Fracture of Polystyrene
Authors: Lidorikis, Stathis
Advisor: Vlachopoulos, J.
Department: Chemical Engineering
Keywords: melt, fracture, polystyrene, molecular, shear stress
Publication Date: Sep-1970
Abstract: <p> A high-pressure nitrogen-driven viscometer has been used to study the melt fracture of polystyrene. The polystyrene samples used differed in molecular weight and molecular weight distribution. The weight average molecular weight (Mw) ranged from 97,200 to 1.8 x 10^6 and the distribution breadth (Mw/Mn) from 1.06 to 9.21. Results obtained indicate that the critical shear stress varies linearly with 1/Mw, increases slightly with temperature and is independent of the polydispersity of polymers. This type of behaviour is satisfactorily explained in terms of Graessley's entanglement theory.</p>
URI: http://hdl.handle.net/11375/18563
Appears in Collections:Open Access Dissertations and Theses

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