Kampa Łukasz, Chowaniec Agnieszka, Królicka Aleksandra, Sadowski Łukasz
Department of Building Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland.
Department of Metal Forming, Welding and Metrology, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland.
Materials (Basel). 2020 Oct 20;13(20):4674. doi: 10.3390/ma13204674.
This article describes the effect of adding polypropylene fibers to primer on the pull-off strength of epoxy resin coatings. Investigated primers were laid on substrates made of cement mortar and cement slurry. The primer was made of epoxy resin modified with the addition of 0.5%, 1%, 1.5% and 2% of polypropylene fibers. One reference sample was made without the addition of fibers. Then, an epoxy resin coating was applied to each substrate. Four pull-off strength tests were performed for each material configuration. For this purpose, an automatic device for measuring the pull-off strength of the coatings was used. The results were compared with the results obtained for the reference sample. The optimum content of polypropylene fibers was found to be in the range of 0.5-1.0 wt. % of the mass of the resin. One percent of fibers was optimum for the epoxy resin laid on the cement slurry, while 0.5 wt. % of fibers was optimum for the mortar substrate. The addition of a higher amount of polypropylene fibers resulted in a lower pull-off strength of coatings than for the reference sample.
本文描述了在底漆中添加聚丙烯纤维对环氧树脂涂层拉拔强度的影响。所研究的底漆涂覆在水泥砂浆和水泥浆制成的基材上。底漆由添加了0.5%、1%、1.5%和2%聚丙烯纤维的环氧树脂制成。制备了一个未添加纤维的参考样品。然后，在每个基材上涂覆环氧树脂涂层。对每种材料配置进行了四次拉拔强度测试。为此，使用了一种用于测量涂层拉拔强度的自动装置。将结果与参考样品的结果进行比较。发现聚丙烯纤维的最佳含量在树脂质量的0.5-1.0 wt.%范围内。对于涂覆在水泥浆上的环氧树脂，1%的纤维是最佳的，而对于砂浆基材，0.5 wt.%的纤维是最佳的。与参考样品相比，添加更高含量的聚丙烯纤维会导致涂层的拉拔强度降低。
