| 短切芳纶纤维/聚硅氧烷-甲基丙烯酸锌复合材料的结构与性能 |
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| 引用本文： | 雷卫华,陈可平. 短切芳纶纤维/聚硅氧烷-甲基丙烯酸锌复合材料的结构与性能[J]. 复合材料学报, 2021, 38(5): 1398-1406. DOI: 10.13801/j.cnki.fhclxb.20201105.001 |
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| 作者姓名： | 雷卫华 陈可平 |
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| 作者单位： | 中国工程物理研究院 化工材料研究所,绵阳621999 |
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| 摘 要： | 为提高聚硅氧烷-甲基丙烯酸锌(ZDMA)树脂材料的性能,采用短切通用型芳纶纤维与聚甲基乙烯基硅氧烷-ZDMA复合并在高温下交联固化,得到短切芳纶纤维/聚硅氧烷-ZDMA复合材料.采用SEM、FTIR、拉伸和压缩试验方法、霍普金斯压杆试验方法,表征了短切芳纶纤维/聚硅氧烷-ZDMA复合材料的结构和静态力学性能,研究了芳纶...
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| 关 键 词： | 芳纶纤维 聚硅氧烷 甲基丙烯酸锌(ZDMA) 复合材料 结构 动态压缩性能 |
| 收稿时间： | 2020-08-16 |
Structure and properties of short-cutted aramid fiber/ polysiloxane-zinc dimethylate composites |
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| Affiliation: | Instute of chemical materials, CAEP, Mianyang 621999, China |
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| Abstract: | In order to improve the properties of polysiloxane-zinc dimethylate (ZDMA) resin, the short-cutted aramid fiber of general type was blended with polymethylvinylsiloxane-ZDMA compounds and cured at high temperature and pressure, and then the short-cutted aramid fiber/polysiloxane-ZDMA composites were gotten. The structure of short-cutted aramid fiber/polysiloxane-ZDMA composite was characterized by SEM and IR spectroscope, tensile and compressive properties were tested, the effects of the aramid fiber dosages and strain rates on the dynamic compression were also studied. The results show that the flowing property of the short-cutted aramid fiber/polysiloxane-ZDMA composites is affected by the short-cutted aramid fiber, which is not easy to disperse uniformly; the composite’s uniformity is not good at entirety. The fact is found that the fibers tends to aggregate together while the fiber dosage increasing, which causes the mechanical properties to fluctuate. The introduction of the aramid short fiber can improve the tensile strength and compressive stress of the short-cutted aramid fiber/polysiloxane-ZDMA composites, while its elongation at break decrease sharply. At the strain rate of 800 s?1, the addition of the aramid fiber shows no significant influence on the dynamic compressive property. While in the strain rate range of 1500-2500 s?1, the dynamic compressive stress of short-cutted aramid fiber/polysiloxane-ZDMA composites increases with the dosage of aramid short fiber. The polysiloxane-ZDMA composite without aramid fiber is relatively sensitive to the strain rate, while the dynamic compressive properties of short-cutted aramid fiber/polysiloxane-ZDMA composites with 8% mass ratio of aramid short fiber to polysiloxane are rather steady to the strain rate range of 1500-3000 s?1. |
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