抄録
Bagasse and polypropylene was mixed with a double arm kneading mixer, and palletized. The pellet was molded with an injection molding machine. The effects of weight fraction, injection temperature and pith on flexural modulus of composites and impact strength were investigated. The flexural modulus increased with increasing the bagasse fiber weight fraction under the rule of mixture, while the impact strength decreased. The flexural modulus and impact strength decreased with increasing injection temperature from 185℃ to 225℃. The optical photographs revealed that the fiber length of composites at 185℃ was obviously shorter than that at 225℃ despite the fiber length of pellets was equal. Furthermore, the flexural modulus and impact strength with pith 50% decreased by 7-10%. This seems due to the decrease of average fiber length.
