368405 Mechanistic Function of Costabilizers in Peroxide-Induced Crosslinking of Industrial Polyethylene Blends

Wednesday, November 19, 2014: 4:30 PM
International 9 (Marriott Marquis Atlanta)
Mark Conley1, Fiaz Mohammed1, Jeffrey Cogen2, Bharat Chaudhary2, Yabin Sun3, Pamela Pollet4, Charles A. Eckert1 and Charles L. Liotta4, (1)School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, (2)The Dow Chemical Company, Spring House, PA, (3)Dow Chemical China Company, Shanghai, China, (4)School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA

Polyethylene compounds for industrial applications are typically crosslinked via a radical pathway by means of a radical initiator, such as dicumyl peroxide.   The compositions also contain additives designed to improve heat-aging performance.   However, due to interactions with the peroxide, some of these additives can negatively affect peroxide stability in the polymer compound product. Using dodecane as the model for polyethylene, the current work examines the kinetics and product distribution associated with the thermal decomposition of dicumyl peroxide in the presence of several costabilizers in air and under a nitrogen atmosphere.  Mechanistic explanations based on the experimental observations will be presented.

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See more of this Session: Mechanics and Structure in Polymers
See more of this Group/Topical: Materials Engineering and Sciences Division