scholarly journals Review on Interfacial Bonding Mechanism of Functional Polymer Coating on Glass in Atomistic Modeling Perspective

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2244
Author(s):  
Hyunhang Park ◽  
Sung Hoon Lee
Keyword(s):  
Polymer Film ◽  
Surface Reactivity ◽  
Interfacial Bonding ◽  
Failure Behavior ◽  
Atomistic Modeling ◽  
Adhesion Properties ◽  
Adhesion Measurement ◽  
Hydrolysis Process ◽  
Modeling Techniques ◽  
External Conditions

Atomistic modeling methods are successfully applied to understand interfacial interaction in nanoscale size and analyze adhesion mechanism in the organic–inorganic interface. In this paper, we review recent representative atomistic simulation works, focusing on the interfacial bonding, adhesion strength, and failure behavior between polymer film and silicate glass. The simulation works are described under two categories, namely non-bonded and bonded interaction. In the works for non-bonded interaction, three main interactions, namely van der Waals interaction, polar interaction, and hydrogen bonds, are investigated, and the contributions to interfacial adhesion energy are analyzed. It is revealed that the most dominant interaction for adhesion is hydrogen bonding, but flexibility of the polymer film and modes of adhesion measurement test do affect adhesion and failure behavior. In the case of bonded interactions, the mechanism of covalent silane bond formation through condensation and hydrolysis process is reviewed, and surface reactivity, molecular density, and adhesion properties are calculated with an example of silane functionalized polymer. Besides interfacial interactions, effects of external conditions, such as surface morphology of the glass substrate and relative humidity on the adhesion and failure behavior, are presented, and modeling techniques developed for building interfacial system and calculating adhesion strengths are briefly introduced.

Measurement of Low-k Polymerimetal Interfacial Toughness Using 4-point Bending Method

1996 ◽  
Vol 436 ◽  
Author(s):  
Qing Ma ◽  
Chuanbin Pan ◽  
Harry Fujimoto ◽  
Baylor Triplett ◽  
Peter Coon ◽  
...  
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Adhesion Promoter ◽  
Adhesion Properties ◽  
Interfacial Toughness ◽  
Four Point Bending ◽  
Arylene Ether ◽  
Thin Polymer ◽  
Interconnect Technology ◽  
Low K

AbstractFour-point bending method offers significant advantages over more traditional techniques in measuring adhesion properties of thin polymer films. The former utilizes sandwich structure beams where the polymer film and the interface of interest are placed at the center of two elastic bulks. Such confined geometry closely resembles applications where polymer films are used as dielectric layers in IC interconnect technology. In this work, the bonding between a poly(arylene ether) (PAE) based polymer film and an Al film was studied. Ti layers of several different thickness were used as adhesion promoter. The sandwich samples were made by bonding bulk wafers using an epoxy. Fracture energies were seen to increase with the thickness of the Ti layer. Effects of heat treatment were also studied.

scholarly journals Influence of Adhesion Properties on the Crash Behavior of Steel/Polymer/Steel Sandwich Crashboxes: An Experimental Study

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1400 ◽  
Author(s):  
Mohamed Harhash ◽  
Moritz Kuhtz ◽  
Jonas Richter ◽  
Andreas Hornig ◽  
Maik Gude ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Failure Modes ◽  
Structural Characteristics ◽  
Structural Parameters ◽  
Failure Behavior ◽  
Adhesion Properties ◽  
Polymer Adhesion ◽  
Strong Adhesion ◽  
Materials Used ◽  
The Impact

The energy absorption behavior of crashboxes made of steel/polymer/steel (SPS) sandwich sheets can be influenced by numerous parameters, such as the materials used, their thicknesses and stacking, and the adhesion properties between their layers. Therefore, in the present study, the impact of steel/polymer adhesion quality on the occurring failure modes of the crashboxes and the resulting energy absorptions are experimentally analyzed. For this purpose, axial crushing and three-point bending tests on double-hat and top-hat crash boxes were performed, respectively. Three levels of adhesion quality are investigated: none, weak, and strong adhesion strengths. Additionally, the structural crash properties, such as energy absorption and maximal intrusion, are determined and analyzed at both of the quasi-static and highly dynamic loading rates. The results of these investigations show that the adhesion strengths chosen here significantly influence both the failure modes and the energy absorption values. In particular, the structural parameters, in the case of no adhesion, are at most half of those in the case of strong adhesion. However, it is also shown that, in the case of weak adhesion, the structural characteristics are slightly reduced. Based on these results, the possibility to adjust the adhesion strength—globally and/or locally—could be used in future activities to purposefully tailor the failure behavior of hybrid crashboxes.

scholarly journals Crash Analysis of Aluminum/CFRP Hybrid Adhesive Joint Parts Using Adhesive Modeling Technique Based on the Fracture Mechanics

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3364
Author(s):  
Young Cheol Kim ◽  
Soon Ho Yoon ◽  
Geunsu Joo ◽  
Hong-Kyu Jang ◽  
Ji-Hoon Kim ◽  
...  
Keyword(s):  
Fracture Mechanics ◽  
Composite Laminates ◽  
Cohesive Zone Model ◽  
Failure Behavior ◽  
Zone Model ◽  
Displacement Curve ◽  
Adhesive Failure ◽  
Aluminum Composite ◽  
Explicit Finite Element ◽  
Modeling Techniques

This study describes the numerical simulation results of aluminum/carbon-fiber-reinforced plastic (CFRP) hybrid joint parts using the explicit finite-element solver LS-DYNA, with a focus on capturing the failure behavior of composite laminates as well as the adhesive capacity of the aluminum–composite interface. In this study, two types of adhesive modeling techniques were investigated: a tiebreak contact condition and a cohesive zone model. Adhesive modeling techniques have been adopted as a widely commercialized model of structural adhesives to simulate adhesive failure based on fracture mechanics. CFRP was studied with numerical simulations utilizing LS-DYNA MAT54 to analyze the crash capability of aluminum/CFRP. To evaluate the simulation model, the results were compared with the force–displacement curve from numerical analysis and experimental results. A parametric study was conducted to evaluate the effect of different fracture toughness values used by designers to predict crash capability and adhesive failure of aluminum/CFRP parts.

Hybrid effect of carbon nanotube film and ultrathin carbon fiber prepreg composites

2016 ◽  
Vol 36 (6) ◽  
pp. 452-463 ◽  
Author(s):  
Jiao Pan ◽  
Min Li ◽  
Shaokai Wang ◽  
Yizhuo Gu ◽  
Qingwen Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Chemical Vapor ◽  
Interfacial Bonding ◽  
Damping Capacity ◽  
Failure Behavior ◽  
Hybrid Effect ◽  
Carbon Nanotube Film

This paper successfully interlaced floating catalyst chemical vapor deposition-grown carbon nanotube film and ultrathin carbon fiber prepreg to achieve strong and flexible carbon nanotube/carbon fiber hybrid composites with high carbon nanotube loading. Epoxidation was also introduced to improve interlaminar interfacial bonding. It was found that pristine carbon nanotube film/carbon fiber interply hybrid composite (carbon fiber/carbon nanotube/carbon fiber) showed sudden and brittle failure, while epoxidation caused a gradual failure behavior. Hybrid effect analysis suggested that the improved tensile performance and synergistic effect of epoxidized carbon nanotube film/carbon fiber hybrid composite were attributed to good load transfer and suppressed delamination induced by improved interfacial bonding. In addition carbon fiber/carbon nanotube/carbon fiber manifested excellent damping capacity with the maximum loss factor of 0.13. The in-plane electrical conductivity of composite with global carbon nanotube content of 21 wt% increased to the same order of magnitude as carbon nanotube film composite. The excellent mechanical, damping, and electrical properties demonstrated great potential for both structural and multifunctional applications of the resultant hybrid composites.

Survey of human operator modeling techniques for measurement applications.

1978 ◽  
Author(s):  
Patricia A. Knoop
Keyword(s):  
Human Operator ◽  
Modeling Techniques

The Use of Conformational Restriction and Molecular Modeling Techniques in the Development of Receptor-Specific Opioid Peptide Agonists and Antagonists

1993 ◽  
Author(s):  
Peter W. Schiller ◽  
◽  
Thi M.-D. Nguyen ◽  
Grazyna Weltrowska ◽  
Nga N. Chung ◽  
...  
Keyword(s):  
Molecular Modeling ◽  
Opioid Peptide ◽  
Conformational Restriction ◽  
Modeling Techniques

Anti-Adhesion Properties of Cranberry Products: Current Status and New Directions

Planta Medica ◽  
2013 ◽  
Vol 79 (10) ◽  
Author(s):  
CM Coleman ◽  
KM Auker ◽  
D Ferreira
Keyword(s):  
Current Status ◽  
Adhesion Properties ◽  
New Directions

The influence of external conditions on sound pressure in the pistonphone at the infrasound frequency range

2020 ◽  
pp. 67-72
Author(s):  
A. V. Konkov ◽  
D. V. Golovin
Keyword(s):  
Environmental Conditions ◽  
Sound Pressure ◽  
Primary Method ◽  
Frequency Range ◽  
External Conditions ◽  
Numerical Estimations

The influence of environmental conditions on a sound pressure reproduced by the primary method in the measuring chambers of the Pistonphone in the frequency range from 1 mHz to 250 Hz is estimated. Numerical estimations of influence of environmental conditions on sound pressure in pistonphone measuring chambers are given and special requirements to system of maintenance of required external conditions are specified.

The Investment Climate in Russia

2006 ◽  
pp. 48-77
Author(s):  
Article Editorial
Keyword(s):  
Money Demand ◽  
State Level ◽  
Decision Making Process ◽  
Investment Climate ◽  
Operational Environment ◽  
Gdp Growth Rate ◽  
External Conditions ◽  
Potential Gdp ◽  
The Government ◽  
Economic Boom

During the last six years, exceptionally favourable external conditions for an upsurge of the domestic economy have been developed. However, they failed to result in an economic boom, which has been estimated by the authors as quite possible. One of the reasons for this - deterioration of the investment climate in the country that caused a decline of business activities and money demand decrease thus leading to reduction of potential GDP growth rate. The accumulated modernisation problems cannot be resolved without increasing the economic dynamics. But this requires an economic policy able to facilitate predictability of Russian business operational environment, to protect it legally, to secure a system of partnership relations with the government and to respect the interests of the main participants in the state level decision-making process concerning business undertakings and investment climate.

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