Abraham, Daniel and George, KE and Francis, DJ (1998) Effect of chemical modification on the flow behaviour of LDPE and its blends with linear LDPE. In: Polymer, 39 (1). pp. 117-121.
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Abstract
The flow behaviour of LDPE and its blends with linear LDPE (LLDPE) chemically modified with DCP was studied as a function of blend composition and shear rate at a constant temperature using a capillary rheometer. The effect of chemical modification on the viscous and elastic properties of LDPE and two blend systems LDPE/ LLDPE (80:20, 60:40) is reported. Chemical modification which is in essence a free radical process induces changes that increase melt viscosity and melt elasticity of LDPE and the two blend systems. Modification also enhances compatibility of the molten polymers. Incorporation of a small quantity of linear LDPE having a relatively narrow molecular weight distribution to the conventional LDPE having a long chain branched structure and broader molecular weight distribution lessens the shear thinning behaviour of the modified blends of the two component polymers. Melt elasticity at a constant shear stress and temperature was also investigated using die swell measurements and relating them to recoverable shear strain, normal stress and shear modulus
Item Type: | Journal Article |
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Publication: | Polymer |
Publisher: | Elsevier Science |
Additional Information: | Copyright of this article belongs to Elsevier Science. |
Keywords: | capillary rheometer;chemical modification;flow behaviour. |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 20 May 2009 07:54 |
Last Modified: | 22 Feb 2012 09:20 |
URI: | http://eprints.iisc.ac.in/id/eprint/18445 |
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