PDF(Pubmed)
Abstract：
In this study, the effect of boric acid (H3BO3) on fiber-reinforced layered composites was investigated. Glass fiber-reinforced epoxy composites were used, and the effects of boric acid on thermal and mechanical properties were investigated. For this purpose, composite plates were manufactured by adding boric acid (BA) to the epoxy in different ratios (0, 0.5, 1, and 1.5% by weight). Tensile tests, compression tests, and shear tests were performed to determine the mechanical properties of these plates, and DSC, TGA, and DMA analyses were performed to determine their thermal properties. SEM and EDS analyses were performed on the specimens to examine their morphologies. Furthermore, examinations were conducted on how BA affected the specimens\' failure behavior. In the study, it was found that, except for the compressive strength, the mechanical properties were improved by the added BA. The highest tensile strength, shear strength, modulus of elasticity, shear modulus, and Poisson\'s ratio were obtained from 0.5% BA-added specimens and were 24.78%, 8.75%, 25.13%, 11.24%, and 12.5% higher than the values obtained from 0% BA-added specimens, respectively. The highest loss and storage modulus were obtained from 0% and 0.5% BA-added specimens, respectively. The specimens\' glass transition temperatures were decreased by the addition of BA; the specimen with a 1% addition of BA had the lowest value. Furthermore, interlayer delamination and fiber/matrix failure were observed in all BA-added specimens.
摘要：
在这项研究中,研究了硼酸(H3BO3)对纤维增强层状复合材料的影响。玻璃纤维增强环氧复合材料，研究了硼酸对热性能和力学性能的影响。为此,通过以不同比例(0、0.5、1和1.5重量%)向环氧树脂中添加硼酸(BA)来制造复合板。拉伸试验,压缩试验,并进行了剪切测试以确定这些板的机械性能，DSC,TGA,并进行DMA分析以确定它们的热性能。对样品进行SEM和EDS分析以检查其形态。此外，对BA如何影响标本的失效行为进行了检查。在研究中,人们发现，除了抗压强度，添加BA提高了力学性能。抗拉强度最高，剪切强度,弹性模量，剪切模量，和泊松比从0.5%添加BA的样品中获得，为24.78%，8.75%，25.13%,11.24%，比添加0%BA的样品获得的值高12.5%，分别。从添加0%和0.5%BA的试样获得最高的损耗模量和储能模量，分别。样品的玻璃化转变温度通过添加BA而降低；添加BA为1％的样品具有最低值。此外，在所有添加BA的样品中观察到层间分层和纤维/基质破坏。
