Improving the strength of injection molded aluminum/polyphenylene sulfide lap joints dependence on surface microstructure and composition. (5th October 2019)

• Record Type: Journal Article
• Authors: Li, Xiping; Xu, Donghou; Gong, Ningning; Xu, Zhenyu; Wang, Linlin; Dong, Weiping
• Is Part Of: Materials & design. Volume 179(2019)
• Publication Date: 2019-10-05
• Subjects: Anodizing -- Injection molding -- Microstructure -- Polymer-metal hybrid; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2019.107875
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Lightweight and high-strength hybrids are of great importance for reducing material and energy consumptions. Glass fiber-reinforced polyphenylene sulfide (PPS) and aluminum (Al) alloy 6061 were joined via flexible injection molding technology. With pretreatments of anodizing and the coupling agent, the maximal lap shear strength between the polymer and metal were noticeably enhanced to 7.7 MPa, which was almost eight fold compared with the untreated case. The scanning electron microscope (SEM) and X-ray photoelectron spectrometer (XPS) investigations proved that the micro cracks with widths of nanometer scale and chemical Al-O-Si bonds were formed on the metal substrate, which contribute significantly to the interface bonding strength. According to Fourier transform infrared (FTIR) investigations, the existing C-N bonds in the coupling-agent layer on the metal surface also have a crucial effect on the bonding strength of the two dissimilar materials. The present novel methodology is much more convenient than other current commercial available technologies, and provides a promising way for the production of polymer-metal hybrids. Graphical abstract: Unlabelled Image Highlights: Glass fiber-reinforced polyphenylene sulfide and aluminum were joined via flexible injection molding technology. With pretreatments of anodizing and coupling agent, the tensile shear strength between the polymer and metal were noticeably enhanced. The micro cracks with widths of nanometer scale and chemical Al-O-Si bonds contribute significantly to the interface bonding strength. The existing C-N bonds also have a crucial effect on the joining strength of the two different materials.