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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)
- Metal-polymer systems (2)
- Plasma polymerization (2)
- 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)
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- Flame retardance (1)
- Fluorination kinetics (1)
- Gas phase fluorination of PE (1)
- Grafting (1)
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- 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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- Poly(ethylene terephthalate) (1)
- Poly(propylene) (PP) (1)
- Poly(tetrafluoroethylene) (1)
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- Polyethylene (1)
- Polymer surfaces (1)
- Polymer-metal composites (1)
- Reactions at Polymer surfaces (1)
- Selective plasma process (1)
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- Surface modification (1)
- Surfaces (1)
- Weathering (1)
- X-ray (1)
- X-ray photoelectron spectroscopy (1)
Technical waxes and paraffins were investigated using supercritical fluid chromatography (SFC), matrix-assisted laser-desorption/ionization mass spectrometry (MALDI-MS) and size-exclusion chromatography (SEC). SEC enables the simultaneous determination of molecular masses up to high values and molecular mass distributions. The resolution of homologous species, however, is poor. In this respect the use of SFC is advantageous. Proper resolution of homologues may be provided up to Mr~1200 without great difficulty. To compare these chromatographic results MALDI-MS was applied for the determination of molecular masses and mass distributions in technical waxes for the first time. Using reflectron mode excellent MALDI mass spectra could be achieved in the molecular mass range up to 1000 Da. The mean values of the molecular masses calculated by MALDI-MS were in sufficient agreement with those of SFC. In the linear mode of MALDI-MS molecular masses could be determined to nearly 3000 Da. Beyond this mass range SEC still remains the method of choice. Advantages and difficulties of the used methods are discussed in this paper.