Mechanical and thermal properties of polypropylene/sugarcane Bagasse composites

Abstract

To determine the possibility of using sugarcane bagasse (SCB) waste as reinforcing filler in the thermoplastic polymer matrix, SCB-reinforced polypropylene (PP) composites were prepared. The PP and SCB composites were prepared by the extrusion of PP resin with 5, 10, 15, and 20 wt % of SCB filler in a corotating twin screw extruder. The extruded strands were cut into pellets and injection molded to make test specimens. These specimens were tested for physicomechanical properties such as tensile, flexural, Izod, and Charpy impact strengths, density, water absorption, and thermal characteristics, namely, heat deflection temperature (HDT), melt flow index, and thermogravimetric analysis. It was found that the flexural strength increased from 23.66 to 26.84 MPa, Izod impact strength increased from 10.499 to 13.23 Kg cm/cm, Charpy impact strength increased from 10.096 to 13.98 Kg cm/cm, and HDT increased from 45.5 to 66.58C, with increase in filler loading from 5 to 20% in the PP matrix. However, the tensile strength and elongation decreased from 32.22 to 27.21 MPa and 164.4 to 11.20% respectively.

Properties of High Density Polyethylene – Paulownia Wood Flour Composites via Injection Molding

“…Some studies have shown that notched IZOD impact strength generally decreases with increasing filler content (Stark and Berger 1997;Ayrilmis and Kaymakci 2013). However, other researchers have found that wood fiber polypropylene composites exhibit no reduction in notched IZOD impact strength compared to the neat thermoplastic as the filler content increases (Hristov et al 2004;Ramaraj 2007;Karmarkar 2007). Also, contrary to this study, Myers et al (1991) found that inclusion of MAPE had a negative effect on notched impact strength of pine WPC compared to those specimens without MAPE.…”

“…However, this trend has been seen in other studies involving biofiber/polypropylene composites (Hristov et al 2004;Ramaraj 2007). The elongation to break is a relatively slow and large deformation process that is sensitive to the initiation of cracks at the incompatible material interface of the wood fiber and HDPE.…”

Caracterização de acetato de celulose obtido a partir do bagaço de cana-de-açúcar por ¹H-RMN

“…Então, uma solução composta por 0,08 mL H 2 SO 4 e 9 mL de ácido acético foi adicionada ao sistema, o qual foi agitado durante exemplo, a utilização da celulose para a produção de álcool pelo processo de hidrólise enzimática e hidrólise ácida [3][4][5] , produção de compósitos [6] e derivados celulósicos [7][8][9][10] . O acetato de celulose (AC), Figura 1, é um dos derivados da celulose com maior importância comercial, principalmente devido às seguintes propriedades: é um polímero neutro, tem a capacidade de formação de filmes transparentes e tem um baixo custo.…”

The use of sugarcane bagasse fibres as reinforcements in composites

“…Fungal decay also resulted in an increase in water absorption of composites with the highest amount corresponding to the 4 months exposure. Ramaraj ( 2007 ) examined the effect of SCB powder on the mechanical and thermal properties of the PP matrix by incorporating SCB powder (passing through a 1.5 mm size screen) in PP as a reinforcing fi ller. PP was compounded with 5, 10, 15 and 20% SCB fi ller in a co-rotating twin-screw extruder and injection which was moulded to create a specimen for testing.…”