Coir fiber/low density polyethylene (LDPE) composites were fabricated with different fiber loading (10-30 wt%) using compression molding technique. A fiber loading of 20 wt% was found optimum, with maximum mechanical properties. Further, the effect of fiber treatment (alkali and acrylic acid) and compatibilizer (MA-g-LDPE) incorporation on the mechanical and water absorption properties of the LDPE composites were studied and compared. The results showed that MA-g-LDPE incorporation into untreated and treated fiber composites led to improved mechanical properties and water resistance compared with the same composite formulation without MA-g-LDPE. However, treated fiber composites with MA-g-LDPE showed lower mechanical properties than untreated fiber without MA-g-LDPE, due to the removal of hydroxyl groups from the hemicellulose and lignin region of the fiber and degradation of fibers by chemical attack. From SEM studies on the tensile fractured composite samples, a good relationship has been observed between the morphological and mechanical properties.
Nam TH, Ogihara S, Tung NH, Compos. Part B, 42, 1648, 2011
Bismarck B, Mishra S, Lampke T, in Natural fibers, biopolymers and biocomposites, Mohanty AK, Misra M, Drzal LT, Eds., Boca Raton, Taylor & Francis (2005).
Nandi A, Kale A, Raghu N, Aggarwal PKJ, Ind. Acad. Wood Sci., 10, 62, 2013
Jannah M, Mariatti M, Bakar AA, Khalil HPSA, J. Reinf. Plast. Compos., 28, 1519, 2009
ASTM D3039. Association standards testing materials. Standard test method for tensile properties of polymer matrix composite materials.
ASTM D790. Association standards testing materials. Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials.
ASTM D570. Association standards testing materials. Standard test method for water absorption of plastics.