The polymer-metal interactive behavior in polyphenylene sulfide/aluminium hetero interface in nano injection molding

Zhou, Feng; Zhou, Haizhen

doi:10.1080/09276440.2019.1626138

Cited by 17 publications

(12 citation statements)

References 27 publications

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“…All the interaction energy comes from the van der Waals energy. Similar result is also reported that the majority of interaction energy at polyphenylene sulfide/aluminum interface comes from the van der Waals energy, while the electrostatic energy has little contribution [ 35 ]. It means the effect of electrostatic energy on the interfacial interaction can be ignored in the interaction energy analysis.…”

Section: Resultssupporting

confidence: 81%

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

Zhou

Jiang

et al. 2020

Polymers

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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.

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Section: Resultssupporting

confidence: 81%

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

Zhou

Jiang

et al. 2020

Polymers

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“…At this time, the interface energy reaches the extreme, and the morphological changes are similar to the results studied by Liu. [32] Further analysis revealed that although the molten polymers exhibited wall slip behavior during the molding process, there were significant differences in their filling F I G U R E 4 Snapshots of morphological changes during the joining process of (A) PA6-Al system and (B) polyethylene aluminum system effects. Specifically, rectangular cavity polymer molecules flowed vertically along the side walls, triangular cavity polymer molecules flowed at an angle along the side walls, and T-shaped cavity polymer molecules flowed vertically along the side walls before diffusing into the cavity corners.…”

Section: Polymer-al Interface Joining Processmentioning

confidence: 99%

Molecular dynamics simulation study of the joining strength of different polymer‐aluminum heterointerfaces in nano‐injection molding

Zhu

Liang

et al. 2022

Polymer Engineering & Sci

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Nano-injection molding has been widely used in polymer-metal integrated structures. This study aimed to investigate the joining strength and bonding mechanism between polymer-metal interfaces, as well as the interfacial interactions and joining properties with molecular dynamics methods. Besides, six polymer-aluminum interface systems in 5.4 Â 5.4 Â 12.5 nm cuboids composed of aluminum, polymer, and vacuum layers (from bottom to top) were constructed. The joining strength and flow behavior were explored by calculating the interfacial energy, filling rate, gyration radius, and pullout force. The effects of nano-cavity shape and non-bonding interaction strength on the separation process were analyzed. The simulation results demonstrated that during the filling process, the polymer molecular chains slipped and flowed along the inner wall of the nano-cavity, and the filling behavior depended largely on the fluidity and filling rate of the polymer. During the separation process, the polymer chains close to the aluminum matrix were stretched, the polymer chains far from the interface were relatively stable, and residual polymer molecular chains were observed near the interface. The interface joining primarily contributed to the interaction energy. Additionally, the formed mechanical interlocking effect further enhanced the joining strength when the nano-cavity was in a "T" shape, providing a reference value for the nano-injection time and dwell time.

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“…This study addresses the correlation between the Mw of PS chains and the conformation assumed by the chains in the vicinity of a highly interactive silver surface studied by SFG spectroscopy. The motivation for this study relies on the fact that polymer/metal interfaces are present in several applications, such as in polymer molding, , in electronics, and in space applications . More specifically, we have decided to study the polymer/silver interface because this interface has been previously studied , and this would facilitate the interpretation of the results.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Molecular Weight on Chain Conformation at the Polystyrene/Silver Interface

Hayes

Wood‐Adams

2021

Langmuir

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The dependence between the conformation of polystyrene (PS) and its molecular weight (Mw) in the vicinity of a metal interface was investigated by sum frequency generation (SFG) spectroscopy. Tilt angles θ ≥ 50° (the angle between the C2 axis of the pendant phenyl ring and the surface normal) were observed for all samples because of the interaction between the aromatic rings and the metal surface. Furthermore, it was found that θ decreases with increasing Mw for PS samples ranging from 20 × 103 g/mol to 400 × 103 g/mol. The intensity of the backbone SFG signal was higher for high Mw PS, compared to low Mw PS, indicating a greater number of backbone interactions with the silver substrate surface for the high Mw sample. These structural differences are driven by different entropic and enthalpic contributions to the free energy of adsorption for different polymer molecular weights. Differences in the polymer free volume and in the relative amount of chain ends with higher mobility may also influence the chain conformation. These results suggest that important interfacial properties of polymeric thin films, such as adhesion and wettability, could be tailored by modifying the polymer Mw to achieve the desired interfacial conformation.

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The polymer-metal interactive behavior in polyphenylene sulfide/aluminium hetero interface in nano injection molding

Cited by 17 publications

References 27 publications

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

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

Molecular dynamics simulation study of the joining strength of different polymer‐aluminum heterointerfaces in nano‐injection molding

Influence of Polymer Molecular Weight on Chain Conformation at the Polystyrene/Silver Interface

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