Abstract
Abaca fibre reinforced polypropylene composites containing 30 wt. % of fibre content have been prepared with different fibre lengths (5, 25 and 40 mm), and the structure and mechanical properties have been evaluated. Influence of compounding processes (mixer-injection molding, mixer-compression molding and direct compression molding process) on the structure, tensile, flexural and Charpy impact properties were investigated. It is observed that, with the increasing fibre length (5 mm to 40 mm), the tensile and flexural properties are showing an increasing tendency but not significantly. Due to the addition of coupling agent, maleated polypropylene (MAH-PP), the tensile and flexural properties increased around 50 % of maximum. Among three different processes compared, the mixer-injection molding process showed better mechanical performance (tensile strength is around 90 % higher) than the other processes, except notched Charpy impact strength. Compression molding (direct) process showed higher (around 170 %) notched Charpy impact strength, in comparison to other processes and with MAH-PP, it was increased 50 % nearly. The mixer-injection molding process exhibited significantly higher odour concentration of the composites compared to the other processes.
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