Abstract
Mar and abrasion resistance were investigated by a progressive load scratch test and steel wool abrasion test, respectively. Two acrylic coating systems including trimethylolpropane triacrylate (TMPTA) and pentaerythritol triacrylate (PETA) were prepared. A soft base layer was introduced as an intermediate layer between two different types of top layer and poly (methyl methacrylate) (PMMA) substrate to demonstrate the effect of soft base layer on mar and abrasion resistance. Abrasion damage on the coating surface was found to be less severe, when the soft base layer was incorporated into the coating systems. The reduction in scratch coefficient of friction (SCOF) and surface roughness was also observed. The results suggested that mar and abrasion resistance was greatly influenced by the presence of soft base layer, although different top layers were used. Moreover, it was found that abrasion resistance was further improved as the thicker soft base layer was applied.
Highlights
Transparent polymeric materials have been utilized for various applications such as automobile windows, optical lenses and displays for electronic devices [1]-[5]
Acrylic coatings with and without soft base layer were prepared to clarify the effect of soft base layer on mar and abrasion resistance
The soft base layer effect on mar and abrasion resistance of acrylic coatings was investigated using progressive load scratch test and steel wool abrasion test. Both test method indicated that mar and abrasion resistance was greatly influenced by the presence of soft base layer
Summary
Transparent polymeric materials have been utilized for various applications such as automobile windows, optical lenses and displays for electronic devices [1]-[5]. Sidorenko et al demonstrated that a polymer trilayer film consisting of compliant rubber interlayer can be used as an abrasion resistant nanoscale coating with low friction coefficient for silicon surface [15]. This coating is prepared by a multiple grafting technique applied to self-assembled monolayers (SAM) and functionalized tri-block copolymer, followed by the photopolymerization of a topmost polymer layer. The presence of PDMS soft layer resulted in enhanced abrasion resistance and reduction in friction coefficient due to cushioning effect, which reduces the local stress. The effect of soft base layer on macro-abrasion resistance and mar behavior for polymeric coating on polymer substrate has not been clarified yet. The effect of soft base layer thickness on abrasion resistance is further demonstrated
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