Journal
PLASMA PROCESSES AND POLYMERS
Volume 9, Issue 9, Pages 855-865Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.201200001
Keywords
adhesion; coatings; etching; plasma polymerisation; polycarbonate
Funding
- Common-wealth of Australia, through the Co-operative Research Centre for Intelligent Manufacturing Systems and Technologies
- Cooperative Research Centre for Advanced Automotive Technology and Samvardhana Motherson Reflect - Australia
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Favourable properties of polycarbonate have led to it replacing glass in many applications; however it does require a protective coating. Plasma deposited protective coatings of amorphous SiOxCyHz have, however, shown marginal adhesion to polycarbonate. This study has shown that plasma pre-treatments using vapours from the alcohol family improved the coating adhesion on two types of polycarbonate. It is suggested that these plasmas both etch the polycarbonate and deposit a thin plasma polymer layer. It was previously reported that a similar adhesion improvement was obtained on PMMA, however under shorter treatment times. The variation has been linked to the difference in etch rates of the two polymers. This has led to an improved understanding of the etching mechanism of both polymers when exposed to radicals.
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