Study of Processing and Properties of a few Hemp Linter Fiber Reinforced Polylactic Acids Composite Materials
Composites of poly(L-lactide) (PLA) with hemp linter fibers, prepared by batch mixing and plasticized with poly(ethylene glycol) (PEG; weight-average molecular weight 1000 g/mol), were examined by differential scanning calorimetry, thermogravimetric analysis, and mechanical tests. The properties of samples of PLA/hemp and PLA–PEG/hemp composites were analyzed as a function of the fiber amount. The thermogravimetric analysis of the composites, carried out in air, showed that the degradation process of fiber-filled systems started earlier than that of plain PLA, independently of the presence of the plasticizer. Mechanical tests showed that the property of the composites have been enhanced increased with the hemp content. The mechanical performance high-point of composites appear with count of hemp linter fiber at 1%.(sample count of hemp fiber form 1% to 7%). Plasticization with PEG did not improve the tensile properties of the composites, but improve its break stress.
Xiaoming Qian and Huawu Liu
J. S. Luan et al., "Study of Processing and Properties of a few Hemp Linter Fiber Reinforced Polylactic Acids Composite Materials", Advanced Materials Research, Vols. 332-334, pp. 1785-1789, 2011