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- Plasma modification (5)
- Functional groups (3)
- Introduction of functional groups (3)
- Peel strength (3)
- Pulsed plasma (3)
- Pulsed plasma polymerization (3)
- Acrylic acid (2)
- Allyl alcohol (2)
- Allylamine (2)
- Aluminium (2)
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- Polypropylene (2)
- Reactions at polymer surfaces (2)
- r.f. pulsed plasma (2)
- Adhesion (1)
- Adhesion promoters (1)
- Adhesion promoting interlayers (1)
- Adhesion-promoting interlayers (1)
- Adhesion-promoting plasma polymer layers (1)
- Al-functional group interactions (1)
- Attenuated total reflectance-Fourier transorm infrared spectroscopy (1)
- Charcterization of homo- and copolymers (1)
- Chemical conversion of functional groups (1)
- Chemical reduction of functional groups (1)
- Co-polymers (1)
- Conducting films (1)
- Cone calorimeter (1)
- Copolymers (1)
- Degradation (1)
- Doping with metal atoms (1)
- ESCA/XPS (1)
- Encapsulation of nanoparticles (1)
- Flame retardance (1)
- Fluorination kinetics (1)
- Gas phase fluorination of PE (1)
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- Heat release (1)
- Long-term stability (1)
- Metal-polymer composites (1)
- Metal-polymer interactions (1)
- Metal-polymer interface (1)
- Oxygen low-pressure plasma treatment of polymers (1)
- PET (1)
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- Plasma (1)
- Plasma bromination (1)
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- Plasma surface treatment (1)
- Plasma treatment (1)
- Plasma-initiated copolymerization (1)
- Poly(ethylene terephthalate) (1)
- Poly(propylene) (PP) (1)
- Poly(tetrafluoroethylene) (1)
- Polyamides (1)
- Polyethylene (1)
- Polymer surfaces (1)
- Polymer-metal composites (1)
- Reactions at Polymer surfaces (1)
- Selective plasma process (1)
- Spacer (1)
- Spacers (1)
- Surface modification (1)
- Surfaces (1)
- Weathering (1)
- X-ray (1)
- X-ray photoelectron spectroscopy (1)
The X-ray-induced sample damage during mono XPS analysis of an oxygen-plasma-oxidized and subsequently wet-chemically reduced poly(propylene) film was investigated as a showcase for plasma-modified or plasma-deposited samples. By doing this, the degradation index approach as introduced by Beamson and Briggs in the Scienta ESCA300 high-resolution XPS database of organic polymers has been adopted. As to be expected, the sample degrades by loosing oxygen as revealed by observation of decreasing O/C and COR/Csum ratios. However, the X-ray degradation indices are definitely higher than those of conventional reference polymers. Moreover, the COR/Csum degradation index is significantly higher in comparison with one obtained for the O/C ratio. In that context, there is no difference between the plasma sample and a conventional poly(vinyl alcohol) polymer. It is concluded that for reliable quantitative surface chemical analysis, the quality of spectra in terms of acquisition times must be optimized aimed to a minimization of X-ray degradation. Finally, it is proposed to describe the photon flux of an X-ray gun in an XPS experiment, which defines the degradation rate at the end, by using the sample current simply measured with a carefully grounded sputter-cleaned reference silver sample.
Communication: Fire retardant coatings are deposited on polyamide-66 using plasma polymerisation. Chemical composition and thickness of deposits are adjusted varying the plasma treatment based on hexamethydisiloxane mixed with oxygen. The fire retardancy performances are evaluated using a cone calorimeter. The correlation between fire retardancy and thickness as well as chemical composition is discussed.