THE EFFECT OF CO-AGENT ON THE PEROXIDE CROSS-LINKING OF LDPE

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GHASEMI ESMAEIL; MORSHEDIAN J.

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Journal: Iranian Polymer Journal Year:2003 | Volume:12 | Issue:2 Page(s): 119-125

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Information Journal Paper

Title

THE EFFECT OF CO-AGENT ON THE PEROXIDE CROSS-LINKING OF LDPE

Author(s)

GHASEMI ESMAEIL | MORSHEDIAN J. | Issue Writer Certificate

Keywords

LDPEQ4

CO-AGENTQ4

DCPQ4

KINETICSQ4

RHEOMETERQ4

INTERNAL MIXERQ4

CROSS-LINKINGQ4

Abstract

Peroxide CROSS-LINKING of polyethylene is one of the most important methods for the production of cross-linked polyethylene (PEX).The kinetic study of the CROSS-LINKING reaction of low density polyethylene (LDPE) in the presence of 2-4-diphenyl-4-methyl-1-pentene (MSD), pentaerythritol triacrylate (PETA) and divinyl benzene (DVB) as the CO-AGENT and di-cumyl peroxide(DCP) as the CROSS-LINKING agent was carried out by differential scanning calorimeter (DSC, non-isothermal condition), RHEOMETER and INTERNAL MIXER (isothermal condition). The reaction was first order and independent of DCP and the CO-AGENT concentration. The activation energy and ln k0 (ln k0 defined as the intercept of ∆Hvs.1/T) did not change with DCP concentration but energy of activation decreased with CO-AGENT and the highest decrement with respect to MSD .The overall reaction rate constant (in constant value of DCP) increased with temperature due to the faster decomposition rate of peroxide at higher temperatures. By comparison of the three methods used, it was found that the different results had good agreement with each other. However, because of the higher shear rate and mechanical stress experienced in the INTERNAL MIXER, the measured overall reaction rate constants were of higher values with respect to those obtained from other methods.

Cites

POLYETHYLENE CROSS-LINKING BY TWO-STEP SILANE METHOD: A REVIEW

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APA: Copy

GHASEMI, ESMAEIL, & MORSHEDIAN, J.. (2003). THE EFFECT OF CO-AGENT ON THE PEROXIDE CROSS-LINKING OF LDPE. IRANIAN POLYMER JOURNAL (ENGLISH), 12(2), 119-125. SID. https://sid.ir/paper/85873/en

Vancouver: Copy

GHASEMI ESMAEIL, MORSHEDIAN J.. THE EFFECT OF CO-AGENT ON THE PEROXIDE CROSS-LINKING OF LDPE. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2003;12(2):119-125. Available from: https://sid.ir/paper/85873/en

IEEE: Copy

ESMAEIL GHASEMI, and J. MORSHEDIAN, “THE EFFECT OF CO-AGENT ON THE PEROXIDE CROSS-LINKING OF LDPE,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 12, no. 2, pp. 119–125, 2003, [Online]. Available: https://sid.ir/paper/85873/en

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