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- DMA (3)
- Ultrasound (3)
- Dichtungen (2)
- Elastomere (2)
- High pressure DSC (2)
- Phenolic resin (2)
- Post curing (2)
- Reaction kinetic (2)
- Tieftemperaturverhalten (2)
- Compositbauteil (1)
- Compression set (1)
- Cure monitoring (1)
- Dichtung (1)
- Dielectric relaxation (1)
- Differential Scanning Calorimetry (1)
- Druckverformungsrest (1)
- Dynamic Mechanical Analysis (1)
- Dynamic mechanical analysis (1)
- Elastomer (1)
- Elastomers (1)
- Epoxidharz (1)
- Epoxy (1)
- Epxidharz (1)
- Ferroelectric polymer (1)
- Glasübergang (1)
- High temperature (1)
- Incoming goods inspection (1)
- Leakage rate (1)
- Lineare Aufheizung (1)
- Low temperature (1)
- Modulus (1)
- Moulding compound (1)
- Online Prozesskontrolle (1)
- P(VDF-HFP) (1)
- Poly(vinylidene(fluoride - hexafluoropropylene) (1)
- Prepreg (1)
- Process optimization (1)
- Prozesskontrolle (1)
- Rheologie (1)
- Rubber seals (1)
- Thermoanalyse (1)
- Ultraschall (1)
- Uniaxial stretching (1)
- Urea rsin (1)
- Vernetzungsreaktion (1)
- Vulcanization (1)
- Vulkanisation (1)
- tan delta (1)
The prospects of modern thermoanalytical methods for characterisation
of flow, curing and final mechanical behaviour of
moulding compounds were demonstrated. Using urea resin
moulding compounds from different manufacturers the possibilities
of the various techniques could be shown. With comparatively
low effort, fundamental information can be gained
before production process had been started. On this basis it is
possible to make appropriate material selection at an early
point in the process chain. On the basis of thermoanalytical
data an incoming goods inspection can be established. Also it
is easy to control the compliance with the conditions of delivery.
In some cases it could also be helpful to have stored analysis
data especially when problems appear in manufacturing
process or unexpected part damages occur
With the ultrasound measuring system it is possible to transfer
the findings from the analytical methods directly to the processes
in the mould. The application of ultrasound provides
Dynamic Mechanical Analysis in the mould. Beside quality
assurance ultrasound can also be used for process optimisation,
especially for reduction of cycle time. In an advanced form
ultrasound information can be used as a basis for improved
machine control based on material state. The ultrasound measuring
system developed by ISK Iserlohn and BAM can be
obtained from the ISK.
Faserverbundbauteile werden durch Tränkung von Fasergewebe mit flüssigem Harz, in der Regel Epoxidharzen, und anschließender Härtung des Harzes gefertigt. Dabei kann man das Gewebe im Vorfeld mit reaktivem Harz tränken und als so genanntes Prepreg verarbeiten oder man injiziert das frisch mit dem Härter gemischte Harz in ein Werkzeug, in dem das Gewebe bereits liegt - z. B. beim RTM-Prozess. Ausgehend von der Aufgabenstellung, eine Prepregherstellung mit hohem Qualitätsstandard zu realisieren und Möglichkeiten der Fertigungskontrolle für den Prepreg-Verarbeiter aufzuzeigen, wurde an einem für die Prepregherstellung vorgesehenen Harzsystem eine weitgehende Charakterisierung des Aushärtungsverlaufs vorgenommen. Wegen der Schwierigkeit, schnell konstante Aushärtungstemperaturen zu erreichen, wurden bei allen Methoden mit einer Heizrate von 1 K/min von RT bis 200 °C aufgeheizt.
Rubbers are widely used as main sealing materials for Containers for low and intermediate level radioactive waste and as additional component to metal seals in spent fuel and high active waste containers. The save enclosure of the radioactive container inventory has to be guaranteed according to legislation and appropriate guidelines for long term storage periods as well as down to temperatures of -40 °C for transportation. Therefore the understanding of failure mechanisms that lead to leakage at low temperatures is necessary to ensure a proper material choice which is certainly also influenced by additional factors as e.g. the aging behavior.