The effect of INCORPORATING AN organic peroxide

on the rheological and thermal properties

of high density polyethylene

 

C. Khaloua*, A. Douibi, D. Benachour

Laboratoire des Modifications, Préparations et Applications des Matériaux Polymériques et Multiphasiques,

Département de Génie des Procédés , Faculté des Sciences de l'Ingénieur, Université Ferhat Abbas-SETIF, Algérie

* Corresponding author. E-mail: khaloua_cheraz@yahoo.com

Received: 26 January 2008; revised version accepted: 08 February 2009

 

Abstract

     Blends of High Density PolyEthylene (HDPE) were prepared by mixing from a molten state in a plastogragh. The mixing in a molten state aims at investigating the influence of the mixing conditions on the rheological and thermal behaviour of the blends (HDPE/Organic peroxide). The plastograh is one of the appropriate equipments for investigating the ability to process polymer blends. Indeed, this apparatus gives the necessary torque, as a function of time, of the viscous forces, i.e. the viscosity of the material, for the different prepared blends at different mixing temperatures. The rheological study led to interesting information like the increase of the shear torque with  time thus indicating the creation of a new structure which appeared  after a  certain time  t. After this time t, a decrease of the considered property is observed. The results obtained from the differential thermal analysis, i.e. the melt temperature and enthalpy seem to suggest that the crystalline part is not affected.

 

Keywords:   Polyethylene; Organic peroxide; modification; properties.


 

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