UHSPE纤维的表面改性及其增强复合材料防弹性能的研究

对超高强聚乙烯纤维的表面进行电晕放电及二次处理,通过扫描电镜、红外光谱分析了它的表面形态和化学结构变化.SEM图像表明,电晕造成纤维表面出现微裂纹,而且微裂纹的数量和大小随电晕强度的增加而增加.ATR-FTIR光谱显示, 纤维表面同时出现含氧基团,也随电晕强度的增加而增加;二次处理后,纤维表面的化学结构也发生明显的变化.尽管随着电晕强度的增大,UHSPE纤维的拉伸强度连续下降,但经过4kW的电晕处理一段时间后,UHSPE纤维/乙烯基树脂复合材料的层间剥离强度和V50值都出现了最大值,这为进一步研究超高强聚乙烯纤维增强复合材料的防弹性能提供了理论依据.

Study on bulletproof property of composites reinforced by surface-modified UHSPE-fiber

The surfaces of UHSPE fibers were treated by corona discharge and secondary finish. The morphology and chemical structure of the fiber surfaces were analyzed by SEM and ATR-FTIR. The SEM photos showed that micro-pits caused by corona etching appeared on the surfaces of UHSPE fiber, and the number of micro-pits increased with the increase of corona power. The spectra of ATR-FTIR showed some oxygen-containing groups were introduced onto the fibers surfaces. In addition, after a secondary treatment the chemical structure of the fibers changed obviously. Although the tensile strength of the fiber decreased with the increase of corona power, the T-peel strength and V 50 of UHSPE fiber/vinylresin composites showed a maximum value after a corona treatment for some time. These gave some theoretic bases to study the bulletproof property of UHSPE reinforced composites further.