Accelerated degradation of highly loaded polypropylene

Benavides, R, Gonzalez-Hernandez, R, Gonzalez-Cantu, M C, Eyes-Vielma, B and Billingham, N C (2003) Accelerated degradation of highly loaded polypropylene. Journal of Vinyl & Additive Technology, 9 (1). pp. 41-49.

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The accelerated aging of six formulations of polypropylene highly loaded with calcium
carbonate and containing a surfactant additive (stearic acid) as well as an
ultraviolet (UV) stabilizer was studied. Degradation was followed by measuring
mechanical properties (elongation percentage and impact resistance), the dynamic
mechanical behavior and some chemical changes such as molecular weight and
carbonyl group formation along with oxidation temperatures, found by chemiluminescence.
The addition of 30 phr of filler to the polymer reduced the stability of the
mixture, and the stearic acid used to treat the filler enhanced this effect considerably.
On the other hand, the addition of the photostabilizer controlled to some extent
such negative effects. though not completely. The most stable formulation was the
polypropylene containing only the LJV stabilizer.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Norman Billingham
Date Deposited: 06 Feb 2012 18:45
Last Modified: 30 Nov 2012 17:01
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