Thermal Degradation of HDPE Short Fibers Reinforced Epoxy Composites
نویسنده
چکیده
Thermogravimetric analysis was carried out to investigate the thermal degradation of High Density Poly Ethylene (HDPE) short fibers reinforced epoxy composites. Three composites with 5, 10 and 15 % by weight of HDPE short fiber composition were prepared using epoxy as matrix material. The HDPE short fiber used as reinforcing material into the resin helps in retarding the thermal degradation of epoxy. It has been noted that there is a composition dependence on the course of kinetic slower of epoxy with fiber loading. Of three compositions, the 10 % HDPE filled Epoxy composite shows better thermal resistance. This has been understood from the derivative peak temperatures 365°C and 391°C corresponding to 5% and 10 % levels of fiber loading respectively. Similarly the weight retention at IDT for neat epoxy, 5% and 10% fiber levels in epoxy were 83%, 84% and 87% respectively. The 15 % HDPE filled Epoxy composite shows downward trend with respect to derivative peak temperature and weight retention at IDT. The Horowitz-Metzger method was used to calculate the activation energies and results are tabulated. Morphological analysis was carried out with scanning electron microscopy (SEM) to evaluate the dispersion of the fibers in the epoxy matrix. UL-94 Horizontal and Vertical Burning tests conducted for the samples indicated that these materials can be used in structural, agricultural and decorative applications.
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