Ethylene Propylene Rubber Polyampholytes and their Blends with Polypropylene as an Alternative to Chemically Cross-Linked Thermoplastic Elastomers and Thermoplastic Vulcanizates

2013 ◽  
Vol 8 (2) ◽  
pp. 112-121 ◽  
Author(s):  
Andrew Powell ◽  
Marianna Kontopoulou ◽  
Sassan Hojabr
Keyword(s):  
Thermoplastic Elastomers ◽  
Ethylene Propylene ◽  
Thermoplastic Vulcanizates ◽  
Ethylene Propylene Rubber

Formulations for thermoplastic vulcanizates based on high density polyethylene, ethylene-propylene-diene monomer, and ground tyre rubber

2011 ◽  
Vol 45 (11) ◽  
pp. 1189-1200 ◽  
Author(s):  
J. Cañavate ◽  
P. Casas ◽  
X. Colom ◽  
F. Nogués
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Thermoplastic Elastomers ◽  
High Density ◽  
Ethylene Propylene Diene Monomer ◽  
Good Balance ◽  
Ethylene Propylene ◽  
Thermoplastic Vulcanizates ◽  
Ground Tyre Rubber ◽  
Rubber Phase

Thermoplastic vulcanizates (TPVs) are a specific group of the so called thermoplastic elastomers. The main characteristic is the existence of a crosslinked rubber phase obtained by dynamic vulcanization in the presence of the thermoplastic matrix. This article studies TPVs based on ground tyre rubber (GTR), high-density polyethylene, and ethylene propylene diene monomer rubber. Vulcanization is performed by a new peroxide developed to resist high temperatures and an standard one. The aim of this study is optimize the formulation in order to include GTR, while maintaining a good balance of properties in the final TPV material. The use of GTR would improve the possibilities of recovering tyre waste. A detailed study regarding the influence of each component in the final mechanical properties has been carried out. The swelling properties, ATR infrared spectroscopy, TGA, and DSC analysis indicated a high degree of crosslink and good adhesion between the matrix and the rubber phase. Morphology of the composites was assessed by scanning electron microscopy. A composite containing a combination of peroxides and 40/30/30 of HDPE, EPDM, and GTR was found to show a good balance of characteristics regarding mechanical properties, crosslinking, and adhesion between phases.

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