Composites Part B: Engineering ( IF 13.1 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.compositesb.2020.108487 Peter Kiss , Joachim Schoefer , Wolfgang Stadlbauer , Christoph Burgstaller , Vasiliki-Maria Archodoulaki
In the present study a range of glass fibre (GF) coatings (roving sizings and yarn finishes) were investigated for the manufacture of high-performance composite laminates based on Polyamide 6 (PA6) and Polyphenylene Sulfide (PPS) matrices. Matrix compatibility and resulting composite performance of press-consolidated laminates was evaluated by macro-mechanical testing on the basis of 3-point flexural and short-beam-shear tests. Among the tested yarn finishes, γ-aminopropyltriethoxysilane (A-1100 aminosilane yarn finish) and chromium(III)methacrylate (Volan®A chromium yarn finish) stood out as highly efficient adhesion promoters for both PA6 and PPS. Flexural strength properties of laminates prepared from finished yarn fabrics (up to 770 MPa) surpassed industrial grade laminates. A GF-epoxy laminate yielded lower flexural strength (570 MPa) compared to the GF-PPS laminates at an identical fibre volume fraction of 56%. These findings exemplified that neat PA6 and PPS matrices require no further chemical modification, i.e. adhesion and resulting composite strength can be tailored most efficiently by fibre coating adaptation. SEM imaging further verified that PA6 and PPS polymers adhere strongly to specific glass fibre coatings. In contrast, laminates made from desized (uncoated) fabrics exhibited interfacial debonding, and hence the lowest laminate performance throughout. Additional compression, and compression after impact tests (50 J impact) revealed that laminates made from sized or finished fabrics boast superior impact attenuation when compared to their desized fabric counterparts.
中文翻译:
高性能GF-PA6和GF-PPS复合层压板中玻璃纤维粗纱和纱线整理剂的实验研究
在本研究中,研究了一系列玻璃纤维(GF)涂层(粗纱和纱线整理剂),用于制造基于聚酰胺6(PA6)和聚苯硫醚(PPS)基质的高性能复合层压板。在三点弯曲和短梁剪切试验的基础上,通过宏观力学测试评估了压实层压板的基质相容性和所得复合材料的性能。在测试的纱线整理剂中,γ-氨基丙基三乙氧基硅烷(A-1100氨基硅烷纱线整理剂)和甲基丙烯酸铬(III)(Volan®A铬纱线整理剂)是PA6和PPS的高效粘合促进剂。由成品纱线织物(最高770 MPa)制成的层压板的抗弯强度性能超过了工业级层压板。在相同的纤维体积分数为56%的情况下,与GF-PPS层压板相比,GF环氧层压板的弯曲强度较低(570 MPa)。这些发现表明,纯净的PA6和PPS基质不需要进一步的化学修饰,即可以通过纤维涂层的适应性最有效地调整粘合力和所得复合强度。SEM图像进一步证实了PA6和PPS聚合物对特定的玻璃纤维涂层有很强的附着力。相反,由脱胶的(未涂覆的)织物制成的层压板表现出界面剥离,因此,整个层压板性能最低。额外的压缩和冲击试验后的压缩(50 J冲击)表明,与定尺寸的织物相比,上浆或成品织物制成的层压板具有出色的冲击衰减性能。