Effect of gamma radiation on physico-mechanical properties of vulcanized natural rubber/carbon fiber composites

Abstract

Natural rubber was reinforced with a short carbon fibers (SCFs) at different concentrations (0-20 part per hundred part of rubber (phr)). The composites were vulcanized by sulfur, then subjected to gamma radiation at different doses up to 40 kGy. Physico-mechanical properties of composites were studied. Also, thermogravimetric analysis was used to investigate the influence of the incorporation of SCF on the thermal properties of prepared composites. It was observed that the mechanical properties like tensile strength increases with increasing irradiation dose up to 30 kGy and fiber loading up to 15 phr, meanwhile the hardness and modulus increase with increasing fiber loading, but not affected by irradiation dose. Thermal stability of composites was increased by fiber loading content at constant irradiation dose. The morphological studies were made by means of scanning electron microscopy to investigate the structure change caused by the incorporation of SCF.

Application of General Regression Neural Network in Forecasting the Effect of 6PPd Antioxidant and Gamma Irradiation on NBR Rubber Mechanical Properties

“…It predicts the mechanical properties for a large number of doses (21 doses) in 15 sec that cannot be measured experimentally in this short time, as 5 doses measured in the laboratory took from 7 to 30 days. 4. It is found that the MAPE of prediction decreases with increasing the number of mechanical properties.…”

“…Issue8 volume 1 January-February 2018 Available online on http://www.rspublication.com/ijst/index.html ISSN 2249-9954 When rubbers are irradiated, free radicals and ions are formed that can react to produce cross linked rubbers (4) . At high irradiation doses, ozone attack on rubber compounds causes characteristic cracking perpendicular to the direction of applied stresses.…”

Effect of X-ray exposure on nano-mechanical properties of multi-walled carbon nanotube incorporated silicone polymer nanocomposites: An AFM-based study

“…It was observed from Figures 12(a) and (b) that the elastic moduli increased with MWCNT concentrations in all the cases. Further, with increasing elastic moduli, the deformation decreased for the unexposed and X-ray exposed polymer nanocomposites, as shown in Figures 12(a The increase in elastic modulus at higher MWCNT concentration was due to an increase in adhesion force with surface roughness at higher nanofiller loading, 17 and Figures 12(c) and (d) show the linear increase in elastic moduli with adhesion force for the unexposed and X-ray exposed polymer nanocomposites, respectively, which was in agreement with equation (8). 37 The obtained elastic moduli were found to be in good agreement with the earlier values reported by Shang et al 42 for ∼4.0 to ∼11.0 wt.…”

Chitosan and Natural Rubber Latex Biocomposite Prepared by Incorporating Negatively Charged Chitosan Dispersion

“…However, the products from NRL show some weaknesses such as low modulus, barrier properties and electrical properties that affect the quality of the natural rubber (NR) products. Consequently, many attempts have been made to use a reinforcing filler such as graphene oxide [ 5 ], multiwalled carbon nanotube [ 6 ], organoclay [ 7 , 8 ], carbon black [ 9 ], silica [ 10 ], cassava starch [ 11 ], and carbon fiber [ 12 ], to improve NR properties. The incorporation of bio-fillers from renewable resources into NRL could result in new biocomposites with enhanced features and biodegradability, so it is of interest to study the possibility of using chitosan (CT) as a reinforcing filler for NRL.…”