Abstract

The interpenetrating polymer networks (IPN) thin film with the –C=O group in one network and the terminal –N=C=O group in another network on an aluminum substrate to reinforce the adherence between IPN and aluminum through interfacial reactions, were obtained by dip-pulling the pretreated aluminum substrate into the viscous-controlled IPN precursors and by the following thinning treatment to the IPN film to a suitable thickness. The interfacial actions and the adhesion strengths of the IPN on the pretreated aluminum substrate were investigated by the X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and strain-stress(?-?) measurements. The XPS and FTIR detection results indicated that the elements’ contents of N, O, and Al varied from the depths of IPN. The in-terfacial reaction occurred between the –N=C=O group of IPN and the AlO(OH) of pretreated aluminum. The in-creased force constant for –C=O double bond and the lower frequency shift of –C=O stretching vibration absorption peak both verified the formation of hydrogen bond between the –OH group in AlO(OH) and the –C=O group in IPN. The adherence detections indicated that the larger amount of –N=C=O group in the IPN, the higher shear strengths between the IPN thin film and the aluminum substrate.

Highlights

  • Adsorption of polymer onto the surface of metal is of great importance in such applications as the adhesive bonding, corrosion protection, colloid stabilization and many other areas [1,2]

  • The interpenetrating polymer networks (IPN) thin film with the –C=O group in one network and the terminal –N=C=O group in another network on an aluminum substrate to reinforce the adherence between IPN and aluminum through interfacial reactions, were obtained by dip-pulling the pretreated aluminum substrate into the viscous-controlled IPN precursors and by the following thinning treatment to the IPN film to a suitable thickness

  • The interfacial actions and the adhesion strengths of the IPN on the pretreated aluminum substrate were investigated by the X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and strain-stress( - ) measurements

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Summary

Introduction

Adsorption of polymer onto the surface of metal is of great importance in such applications as the adhesive bonding, corrosion protection, colloid stabilization and many other areas [1,2]. The role of polymers containing nitrogen- or oxygen-functionalities in polymer-metal adhesion has been an important subject [7,8]. It has been reported that the adhesion strength between polymer and metal could be enhanced significantly by the incorporation of nitrogen- or oxygen-containing functionalities into polymer [9,10,11]. This illustrates that the reactions between polymer and metal can improve the adhesion effectively. There usually exist the complex structures for polymer, the determination of the polymer reaction sites with metals facilitates the choice of metal/polymer systems, especially when specific properties such as interfacial stability and adhesion are required [12,13]

Preparation of an IPN Thin Film on an Aluminum Substrate
The Viscous Determination and the Morphology Observation
The Interfacial Actions Detection and the Adhesion Strengths Measurements
The Micro Morphologies of the Pretreated Aluminum Substrate Surface
The Relationship of the Thickness of the
The Interfacial Actions and the Adhesion Strengths of IPN-Al
Conclusions
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