Smithers Rapra specialises in cure characterisation, with a range of methods available on hand in our laboratories.
Expert cure characterisation assistance for both rubbers and plastics
MDR or Moving Die Rheometer is the most common cure test for rubber compounds. This is the first test carried out on all of the rubber compounds we produce. We also offer this as service to companies that do not have the facilities in-house.
Thermosets, sealants and adhesives:
We offer a range of different measurement techniques such as rheometers, SVNC, DSC, DMA and IR. Rheometers can be used to measure cure up to the gelation point. We can offer both oscillating rheometry and the MDR in some cases.
- SVNC or the Scanning Vibrating Needle Curemeter was designed at Smithers Rapra and is used to measure the cure of materials that start as liquid and cure to solids. It is a robust and reliable method to characterise cure in materials that cure to semi-hard or rubbery solids.
- DSC measures the heat of reaction and therefore can be used to characterise the degree of cure in a material. A peak in the cure region indicates that the reaction was not fully complete.
- DMA or DMTA can be used to measure the glass transition temperature of many thermosets. As the cross-linking reaction increases so does the glass transition temperature.
- IR can be used to look for chemical groups that either form or are consumed during a curing reaction.
For guidance with cure characterisation please get in touch with our featured expert.