Modification of clarified polypropylene by oxygen plasma to improve the adhesion of thin amorphous hydrogenated carbon films deposited by plasma enhanced chemical vapor deposition

Despite having many potential applications, polypropylene (PP) has limitations that may make its application difficult when there is a requirement for high transparency and low‐gas permeability. In this context, studies have been reported about the usage of amorphous hydrogenated carbon thin films t...

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Bibliographic Details
Published in:Polymer engineering and science 2013-05, Vol.53 (5), p.1065-1072
Main Authors: Aguiar, P.H.L., Oliveira, É.C., Cruz, S.A.
Format: Article
Language:English
Subjects:
Adhesion
Adhesion tests
Applied sciences
Carbon
Chemical properties
Chemical vapor deposition
Coating, metallization, dyeing
Composition
Deposition
Dielectric films
Exact sciences and technology
High temperature plasmas
Identification and classification
Infrared spectroscopy
Machinery and processing
Oxygen
Oxygen plasma
Packaging
Permeability
Plasma
Plasma (Ionized gases)
Plastics
Polymer industry, paints, wood
Polypropylene
Polypropylenes
Production processes
Technology of polymers
Thin films
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Summary:Despite having many potential applications, polypropylene (PP) has limitations that may make its application difficult when there is a requirement for high transparency and low‐gas permeability. In this context, studies have been reported about the usage of amorphous hydrogenated carbon thin films to act as a functional barrier in polymer packaging. Therefore, this current work evaluated the modification on the surface‐clarified polypropylene (cPP) by oxygen plasma to improve the adhesion of amorphous hydrogenated carbon films (a‐C:H) deposited by plasma‐enhanced chemical vapor deposition. However, some applications of these films are limited by the presence of microdefects and low adhesion when applied onto polymeric substrates. So, the surface of cPP was treated with oxygen plasma, and the adhesion between the a‐C:H films and cPP was evaluated. Contact angle goniometry, infrared spectroscopy, and atomic force microscopy were used to analyze chemical and morphological changes, respectively. Tape test and scanning electron microscopy were used to evaluate the adhesion of a‐C:H films deposited on a cPP surface. The results showed that the pretreatment increased the adhesion between the cPP and amorphous hydrogenated carbon, which is crucial for the application of these films in packaging with high‐barrier properties. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.23351