Normal Water Effect on the Thermal and the Mechanical Properties of Jute Yarns

The production of the jute fibers and yarns in enormous amounts and their use in different fields requires an overall comprehension of the evolution of their performance during their use and before their end life. Exposing the jute yarns to the extreme environmental conditions, such as high humidity, severe weathering, severe environments, freezing environments and others can degrade the mechanical properties jute yarns. Besides, the use of these jute yarns on the appropriate applications immersed in normal water may be accelerated them to reach their end-of-life. In this work, the thermal and mechanical properties of the jute yarns immersed in normal water for different duration were evaluated. This environmental condition was selected owing to the high probability to the exposing of yarns to the immersing in normal water on outdoors which affect their performance. The thermal stability of the jute yarns was effectuated in order to explain the chemical and physical changers occurred and linked to the mechanical properties. Results show that the mechanical properties of the jute yarns degraded by along immersion in water compared to the raw one. The tensile stress and the tensile modulus are dropped by 47 % (from 52 to 28 MPa) and 46 % (from 2.28 to 1.24 GPa), respectively for the samples immersed in water along duration (9 months) compared to the raw samples. Besides, the thermal stability of the immersed samples shows that there are no significant changes except a slight high residue for the immersed ones.