Thermal analysis applied to studying the influence of ionic liquids on the vulcanization, thermal stability and damping properties of ethylene-propylene-diene rubber

The main aspect of the research was developing new systems for activating sulfur vulcanization of ethylene-propylene-diene elastomer (EPDM) with greater activity than the micrometer zinc oxide that is traditionally used. Differential scanning calorimetry (DSC) was applied to study the temperature an...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-11, Vol.138 (4), p.2669-2681
Main Authors: Sowińska, Anna, Maciejewska, Magdalena
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Calorimetry
Chemistry
Chemistry and Materials Science
Chlorides
Crosslinked polymers
Damping
Dichloropropane
Differential scanning calorimetry
Dynamic mechanical analysis
Dynamic stability
Elastomers
Enthalpy
Ethylene
Inorganic Chemistry
Ionic liquids
Measurement Science and Instrumentation
Measuring instruments
Physical Chemistry
Polymer Sciences
Properties (attributes)
Propylene
Rubber
Stability analysis
Sulfur compounds
Temperature
Thermal analysis
Thermal stability
Thermogravimetric analysis
Vibration measurement
Vulcanization
Zinc oxide
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Summary:The main aspect of the research was developing new systems for activating sulfur vulcanization of ethylene-propylene-diene elastomer (EPDM) with greater activity than the micrometer zinc oxide that is traditionally used. Differential scanning calorimetry (DSC) was applied to study the temperature and enthalpy of EPDM vulcanization. The range of vulcanization temperatures and the enthalpy of this process were determined. Thermogravimetric analysis was performed to characterize the effect of ILs on the thermal stability of vulcanizates. Dynamic mechanical analysis with tension deformation was used to study the influence of ILs on the loss factor (tan δ ) of EPDM determined as a function of temperature, which is a measure of the ability of the material to dampen vibration. DSC results indicated that ILs significantly reduced the onset temperature and enthalpy of EPDM vulcanization. The most active were alkylimidazolium chlorides, which eliminated the post-curing process. Owing to lower decomposition temperature compared to EPDM, ILs decreased the thermal stability of vulcanizates. On the other hand, ILs had no significant influence on damping properties of EPDM in the rubbery elastic region. Vulcanizates containing ILs exhibited stable dynamic properties at the temperatures of use.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-019-08198-5