Effect of Electron Beam Irradiation on the Mechanical, Thermal, and Dynamic Mechanical Behavior of Waste Polyethylene - Short Glass Fiber Composites
(459-476) Journal of Thermoplastic Composite Materials 24 #3 (2011)
Abstract
Satapathy, Nando and Na of the Indian Institute of Technology, India, studied the effect of electron beam irradiation on the physico-mechanical, thermal, and dynamic properties of short glass fiber (GF)-reinforced waste polyethylene (WPE), virgin high density polyethylene (HDPE), and blends of WPE/HDPE in the ratio 50 : 50 was studied. For comparison, short GFs were irradiated with electron beam separately and the composites were prepared with WPE, HDPE, and blends of WPE with HDPE. Only a single proportion of the GF was used, that is, 50 wt% and dosage of the electron beam was 250 kGy. The results given in this article show that the tensile strength, flexural strength, flexural modulus, and hardness increased when the composites were subjected to electron beam irradiation. The elongation at break does not undergo any change. The results obtained are also confirmed by scanning electron microscopy and thermogravimetric analysis.  (RDC 7/5/2011)

Gamma irradiation of treated waste rubber powder and its composites with waste polyethylene
(58–63)Journal of Vinyl and Additive Technology 17, #1 (2011)
El-Nemr and Khalil of the National Center for Radiation Research and Technology (NCRRT) and National Research Center (NRC), Eygpt showed that treated and gamma-irradiated WRPs gave better properties than untreated ones. Hence, a simple method to prepare composites based on recycled polyethylene and waste rubber powder could be achieved without using expensive treatment of the polymeric wastes. (RDC 2/24/2011)