ガラス短繊維強化熱可塑性樹脂の微量無機添加物(酸化チタン)による引張強度低下に関するマイクロメカニックス的研究 Micromechanics Study of Tensile Strength Deterioration of Short Glass Fiber Reinforced Thermoplastics by a Slight Amount of Inorganic Addition Agent(Titanium Dioxide)
Tensile strength of injection-molded short glass fiber reinforced thermoplastics was remarkably decreased by the addition of a slight amount of titanium dioxide (TiO<SUB>2</SUB>) . Generally it is explained that the strength deterioration is due to much shortening of glass fiber length under processing, since the hardness of TiO<SUB>2</SUB> is higher than that of glass fibers. In this study, the influence of the addition of TiO<SUB>2</SUB> (0.2 wt%) to short glass fiber reinforced polyamide 6 on the strength of glass fibers in the composite was investigated. The tensile strength of the composite containing TiO<SUB>2</SUB> was fairly lower than that of the composite without TiO<SUB>2</SUB>, even if the glass fiber lengths in the composite were unchanged. However, numerous flaws were observed on the surface of glass fibers in the composite containing TiO<SUB>2</SUB>. After tensile test of the composites, the pull-out lengths of glass fibers were measured and the variation of Weibull moduli was estimated by using the data based on the Weibull weakest-link theory. As a result, the value of scale parameter decreased markedly by the addition of TiO<SUB>2</SUB>. Namely, it was found that the main factor of the strength deterioration of short glass fiber reinforced polyamide 6 containing TiO<SUB>2</SUB> was weakening of glass fibers.
- 日本複合材料学会誌 = Journal of the Japan Society for Composite Materials
日本複合材料学会誌 = Journal of the Japan Society for Composite Materials 21(2), 61-68, 1995-03-15
JAPAN SOCIETY FOR COMPOSITE MATERIALS