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Article

Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface

1
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2
Institute of Polymer Technology (LKT), Friedrich-Alexander-University Erlangen-Nürnberg, Am Weichselgarten 9, 91058 Erlangen-Tennenlohe, Germany
3
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(8), 1696; https://doi.org/10.3390/polym12081696
Received: 6 July 2020 / Revised: 27 July 2020 / Accepted: 27 July 2020 / Published: 29 July 2020
(This article belongs to the Special Issue Theory of Polymers at Interfaces)
Polymer-metal hybrid structures can reduce the weight of components while ensuring the structural strength, which in turn save cost and subsequently fuel consumption. The interface strength of polymer-metal hybrid structure is mainly determined by the synergistic effects of interfacial interaction and mechanical interlocking. In this study, the wetting behavior of polypropylene (PP) melt on metal surface was studied by molecular dynamics simulation. Atomistic models with smooth surface and nano-column arrays on Al substrate were constructed. Influences of melt temperature, surface roughness and metal material on the wetting behavior and interfacial joining were analyzed. Afterwards the separation process of injection-molded PP-metal hybrid structure was simulated to analyze joining strength. Results show that the initially sphere-like PP model gradually collapses in the wetting simulation. With a higher temperature, it is easier for molecule chains to spread along the surface. For substrate with rough surface, high density is observed at the bottom or on the upper surface of the column. The contact state is transitioning from Wenzel state to Cassie–Baxter state with the decrease of void fraction. The inner force of injection-molded PP-Fe hybrid structure during the separation process is obviously higher, demonstrating a greater joining strength. View Full-Text
Keywords: polymer-metal hybrid; molecular dynamics simulation; wetting behavior; interfacial interaction; injection-molded direct joining polymer-metal hybrid; molecular dynamics simulation; wetting behavior; interfacial interaction; injection-molded direct joining
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MDPI and ACS Style

Zhou, M.; Fu, L.; Jiang, F.; Jiang, B.; Drummer, D. Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface. Polymers 2020, 12, 1696. https://doi.org/10.3390/polym12081696

AMA Style

Zhou M, Fu L, Jiang F, Jiang B, Drummer D. Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface. Polymers. 2020; 12(8):1696. https://doi.org/10.3390/polym12081696

Chicago/Turabian Style

Zhou, Mingyong, Liang Fu, Fengze Jiang, Bingyan Jiang, and Dietmar Drummer. 2020. "Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface" Polymers 12, no. 8: 1696. https://doi.org/10.3390/polym12081696

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