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Advanced short fiber composites with hybrid reinforcement and selective fiber-matrix-adhesion based on polypropylene – Characterization of mechanical properties and fiber orientation using high-resolution X-ray tomography
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2018-05-19 , DOI: 10.1016/j.compositesa.2018.05.014
C. Kahl , M. Feldmann , P. Sälzer , H.-P. Heim

Composites with two types of reinforcement fibers open a large field of opportunities and combine properties. Glass fibers lead to higher strength and modulus, but they provide a brittle character. In contrast to this, man-made cellulose fiber composites show higher energy absorption and higher elongation-at-break. The aim of this study is to investigate the synergy of those two fiber types in a hybrid compound. Compounds with an overall fiber content of 16 vol% and different ratios of glass and man-made cellulose fibers were prepared with a twin-screw extruder and injection molded to test specimen. Mechanical properties as well as the composite morphology were studied for compounds with selective fiber-matrix-adhesion and without a coupling agent. A bimodal fiber length distribution was found in the hybrid compounds due to the different shortened fiber types. The long man-made cellulose fibers increase the impact strength and influences the fiber orientation in the hybrid.



中文翻译:

先进的短纤维复合材料,具有基于聚丙烯的混合增强和选择性纤维-基体粘合性能-使用高分辨率X射线断层扫描表征机械性能和纤维取向

具有两种类型的增强纤维的复合材料开辟了广阔的机遇领域,并具有综合性能。玻璃纤维导致较高的强度和模量,但它们具有脆性。与此相反,人造纤维素纤维复合材料显示出更高的能量吸收和更高的断裂伸长率。这项研究的目的是研究混合化合物中这两种纤维的协同作用。用双螺杆挤出机制备总纤维含量为16%(体积),不同比例的玻璃纤维和人造纤维素纤维的化合物,并注塑成试样。研究了具有选择性纤维-基质-粘合且无偶联剂的化合物的机械性能以及复合材料的形态。由于缩短的纤维类型不同,在混合化合物中发现了双峰纤维长度分布。较长的人造纤维素纤维可提高冲击强度,并影响混合纤维的纤维取向。

更新日期:2018-05-19
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