Influence of radiation-crosslinking on the elongation behaviour of glass-fibre-filled sheets in the thermoforming process
-
Lisa-Maria Wittmann
,
Michael Wolf
,
Katharina Kurth
Abstract
Thermoforming is one of the most important processes in polymer processing. In the packaging industry, thermoformed parts such as blister packs are manufactured from amorphous plastics such as polystyrene (PS) or polyvinyl chloride (PVC). In the field of semi-crystalline thermoplastics, mainly standard thermoplastics, such as, for example, polypropylene (PP), polyethylene (PE), or polyethylene terephthalate (PET), are used. There is limited literature dealing with the thermoforming of thin filled systems. Filler bonding, in particular, represents a major challenge in strain rheology. Electron irradiation is a way to generate improved filler-matrix bonding. In this study, the influence of fillers and radiation-crosslinking on the elongation behaviour and on the wall thickness distribution was investigated. At higher areal draw ratios, an enormous benefit of radiation-crosslinking of thin filled sheets is shown. While non-crosslinked specimens could not be formed, it was possible to thermoform radiation-crosslinked sheets filled with 10 vol.% glass fibres. Furthermore, with the higher areal draw ratio, the influence of the filler orientation on the stretching behaviour became more apparent.
Acknowledgements
The authors would like to thank the Deutsche Forschungsgemeinschaft (DFG) for funding the work in the project DR 421/20-1 “Vernetzte Halbzeuge für hochbeanspruchte Thermoformanwendungen”. The authors also extend their gratitude to their industrial partners BGS Beta-Gamma-Service GmbH & Co. KG, Bruchsal, Germany, for conducting the irradiation of the samples. Further thanks go to Pöppelmann GmbH & Co. KG Kunststoffwerk-Werkzeugbau (Lohne, Germany), SENOPLAST Klepsch & Co. GmbH (Piesendorf, Austria), and Teknor Germany GmbH (Tauberzell, Germany). The authors are also grateful to LyondellBasell, Industries N.V., Rotterdam, The Netherlands, for providing the material.
Conflict of interest: The authors declare that there is no conflict of interests regarding the publication of this paper.
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Articles in the same Issue
- Frontmatter
- Material properties
- Thermal stability of xanthan gum biopolymer and its application in salt-tolerant bentonite water-based mud
- Thermal stability and dynamic mechanical behavior of functional multiphase boride ceramics/epoxy composites
- Influence of radiation-crosslinking on the elongation behaviour of glass-fibre-filled sheets in the thermoforming process
- Physicochemical and biological investigation of oxygen plasma modified electrospun polyurethane scaffolds for connective tissue engineering application
- Role of polymer/polymer and polymer/drug specific interactions in drug delivery systems
- Preparation and assembly
- Development of antimicrobial and antifouling nanocomposite membranes by a phase inversion technique
- Preparation of nano-SiO2 compound antioxidant and its antioxidant effect on polyphenylene sulfide
- Influence of mixing energy on the solid-state behavior and clay fraction threshold of PA12/C30B® nanocomposites
- Engineering and processing
- Analysis of the formation of gap-based leakages in polymer-metal electronic systems with labyrinth seals
- Effect of gas on the polymer temperature in external gas-assisted injection molding
