Ghanem Zoya, Šourkova Hana Jelinek, Sezemsky Jan, Špatenka Petr
Department of Materials Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, 12135 Prague, Czech Republic.
Polymers (Basel). 2022 Jun 26;14(13):2592. doi: 10.3390/polym14132592.
In this article, the effect of plasma treatment of polyethylene powder and glass fibers on the adhesion between polyethylene and glass fibers in composites prepared by rotational molding was studied. In contrast to other processing techniques, such as injection molding, the rotational molding process operates at atmospheric pressure, and no pressure is added to ensure mechanical interlocking. This makes reinforcing the rotomolded product very difficult. Therefore, the formation of chemical bonds is necessary for strong adhesion. Different combinations of untreated polyethylene (UT.PE), plasma-treated polyethylene (PT.PE), untreated and plasma-treated glass fibers were manually mixed and processed by rotational molding. The resulting composites were cut and tested to demonstrate the effect of the treatment on the adhesion between the composite components and on the mechanical properties of the final composites. The results showed that the treatment of both powder and fiber improved the adhesion between the matrix and fibers, thus improving the mechanical properties of the resulting composites compared to those of pure polyethylene samples and composites prepared using untreated components. The tensile strength, tensile modulus, and flexural modulus of the composites prepared using 10-min treated powder with 20 wt% of 40-min treated fibers improved by 20%, 82%, and 98%, respectively, compared to the pure polyethylene samples.
在本文中，研究了等离子体处理聚乙烯粉末和玻璃纤维对旋转模塑制备的复合材料中聚乙烯与玻璃纤维之间粘附力的影响。与其他加工技术（如注塑成型）不同，旋转模塑工艺在大气压下运行，且不施加压力来确保机械互锁。这使得增强旋转模塑产品非常困难。因此，形成化学键对于强粘附力是必要的。将未处理的聚乙烯（UT.PE）、经等离子体处理的聚乙烯（PT.PE）、未处理和经等离子体处理的玻璃纤维的不同组合进行手动混合，并通过旋转模塑进行加工。将所得复合材料切割并测试，以证明处理对复合材料组分之间粘附力以及最终复合材料机械性能的影响。结果表明，粉末和纤维的处理均改善了基体与纤维之间的粘附力，因此与纯聚乙烯样品以及使用未处理组分制备的复合材料相比，所得复合材料的机械性能得到了改善。与纯聚乙烯样品相比，使用经10分钟处理的粉末和20 wt%经40分钟处理的纤维制备的复合材料的拉伸强度、拉伸模量和弯曲模量分别提高了20%、82%和98%。
