Effect of Viscosity on Low Density Foaming of Poly(ethylene-co-octene) Resins.

Autor: Gendron, Richard, Vachon, Caroline
Předmět:
Zdroj: Journal of Cellular Plastics; Mar2003, Vol. 39 Issue 2, p117, 16p, 13 Graphs
Abstrakt: Foaming of low density poly(ethylene-co-octene) resins by injection molding is the result of various reactions occurring during the process. This includes simultaneous decomposition of the chemical blowing agent and cross-linking of the polymer matrix during curing in the mold, followed by foaming after mold opening. Dynamic theology as well as elongational viscosity were investigated for compounds prepared from resins with different melt indices and various cross-linking agent levels, and these results were linked to the morphology and density of the corresponding foams. Rheological requirements were finally defined quantitatively for this set of conditions. [ABSTRACT FROM AUTHOR]
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