Optimization of processing and post-processing conditions for improved properties of jute-fiber reinforced polymer composites

Abstract

The optimization of some processing and post-processing conditions is experimentally investigated for the improved physical and mechanical properties of a jute-fiber reinforced polymer composite. The individual effects of pressure and temperature as well as their combined effect have been investigated during processing of the composite. The polyester resin based natural fiber composite samples are then thermally aged at different temperatures ranging from 0 to 250°C for a period of one hour. The results show that temperature induced processing of the polymer based composite leads to better mechanical properties compared to the other conditions. This thermal treatment during processing allows the composite to enjoy the curing effect as well as avoid part distortion caused by uneven expansion and contraction. Furthermore, the major physical and mechanical properties are found to improve more when the composite samples are thermally aged at a temperature of around 125°C. The investigation of optical images reveals that the original color of the composite samples remains unchanged up to an ageing temperature of 100°C, however, thermal degradation of the composites becomes evident in terms of both color and mechanical properties when the samples are aged beyond 200°C. The comparison of micro structural images of the samples obtained at room temperature and 125°C also verifies the improvement of micro structures, thereby leading to improved physical and mechanical properties of the present biodegradable fiber reinforced composites.