Obukuro Motofumi, Takahashi Yutaka, Shimizu Hiroshi
Division of Removable Prosthodontics, Fukuoka Dental College, Sawara-ku, Fukuoka 814-0193, Japan.
Dent Mater J. 2008 Jul;27(4):541-8. doi: 10.4012/dmj.27.541.
This study investigated the effect of the diameter of glass fibers on the flexural properties of fiber-reinforced composites. Bar-shaped test specimens of highly filled fiber-reinforced composites (FRCs) and FRC of 30 vol% fiber content were made from a light-cured dimethacrylate monomer liquid (mixture of urethane dimethacrylate and triethylene glycol dimethacrylate) with silanized E-glass fibers (7, 10, 13, 16, 20, 25, 30, and 45 microm in diameter). Flexural strength and elastic modulus were measured. The flexural strength of the highly filled FRCs increased with increasing fiber diameter. In particular, the strengths of highly filled FRCs with 20-, 25-, 30-, and 45-microm-diameter fibers was significantly higher than the others (p<0.05). The flexural strength of FRC of 30 vol% fiber content increased with increasing fiber diameter, except for the FRC with 45-microm-diameter fibers; FRCs with 20-, 25-, and 30-microm-diameter fibers were significantly stronger than the others (p<0.05). Therefore, it was revealed that the diameter of glass fibers significantly affected the flexural properties of fiber-reinforced composites.
本研究调查了玻璃纤维直径对纤维增强复合材料弯曲性能的影响。高填充纤维增强复合材料（FRCs）和纤维含量为30 vol%的FRC的棒状测试试样，由光固化二甲基丙烯酸酯单体液体（聚氨酯二甲基丙烯酸酯和三甘醇二甲基丙烯酸酯的混合物）与硅烷化E玻璃纤维（直径分别为7、10、13、16、20、25、30和45微米）制成。测量了弯曲强度和弹性模量。高填充FRCs的弯曲强度随纤维直径的增加而提高。特别是，直径为20、25、30和45微米的高填充FRCs的强度显著高于其他试样（p<0.05）。纤维含量为30 vol%的FRC的弯曲强度随纤维直径的增加而提高，但直径为45微米的FRC除外；直径为20、25和30微米的FRCs明显比其他试样更强（p<0.05）。因此，研究表明玻璃纤维直径显著影响纤维增强复合材料的弯曲性能。
