摘要
为了探讨再生纤维对不饱和聚酯BMC的增强作用,通过在不饱和聚酯BMC中添加再生纤维,研究了再生纤维质量(FW)和纤维长度(FL)对BMC复合物微观结构和力学性能的影响.结果表明,3 mm FL对树脂成分的粘附性很差,12 mm FL对纤维/树脂的附着力有显著的改善,与3mm纤维相比,12 mm纤维的取向更为特殊和规则.通过将FL增加到12 mm,抗弯强度相比3mmFL复合物提高了70%,拉伸强度提高了57%;另外,随着FL的增加,材料的抗弯强度不断提高,与添加15%(质量分数,下同)FW的BMC复合物相比,在添加20%FW的BMC复合物中可以看到有纤维聚集,表明纤维分布不均匀.随着FW添加量的增加,样品的抗弯强度和拉伸强度先升高后降低,在15%FW处达到最大.本文通过优化FW和FL,使不饱和聚酯BMC的力学性能最大化,为相关研究提供了数据参考.
Abstract
In order to investigate the reinforcement effect of regenerated fiber on the BMC of unsaturated polyester,the effects of regenerated fiber mass(FW)and fiber length(FL)on the microstructure and mechanical properties of BMC composites were investigated by adding regenerated fiber to unsaturated polyester BMC.The results showed that the adhesion of 3 mm FL to the resin composition was poor,and the adhesion of 12 mm FL to the fiber/resin was significantly improved,and the orientation of 12 mm fiber was more special and regular than that of 3 mm fiber.By increasing FL to 12 mm,the flexural strength was increased by 70%and the tensile strength was increased by 57%compared to the 3 mm FL compound.In addition,the flexural strength of the material increased with the increase of FL,and fiber aggregation was observed in the BMC complex supplemented with 20%FW compared with the BMC complex supplemented with 15%FW,indicating uneven fiber distribution.With the increase of FW addition,the flexural strength and tensile strength of the sample first increased and then decreased,and reached the maximum at 15%FW.In this paper,the mechanical properties of unsaturated polyester BMC are maximized by optimizing FW and FL,which provides data reference for related research.
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