Thermoplastic Vulcanizates from Isotactic Polypropylene and Ethylene−Propylene−Diene Terpolymer in Supercritical Propane:  Synthesis and Morphology

1998 ◽  
Vol 31 (16) ◽  
pp. 5407-5414 ◽  
Author(s):  
S. J. Han ◽  
D. J. Lohse ◽  
M. Radosz ◽  
L. H. Sperling
Keyword(s):  
Isotactic Polypropylene ◽  
Ethylene Propylene ◽  
Thermoplastic Vulcanizates ◽  
Ethylene Propylene Diene Terpolymer

Preparation and Characterization of Thermoplastic Vulcanizates-Organoclay Nanocomposites

2005 ◽  
Vol 480-481 ◽  
pp. 333-338 ◽  
Author(s):  
B. Herrero ◽  
M. Arroyo ◽  
Miguel A. López-Manchado
Keyword(s):  
Mechanical Properties ◽  
X Ray Diffraction ◽  
Ethylene Propylene ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Thermoplastic Vulcanizates ◽  
The Matrix ◽  
Silicate Layers ◽  
Ethylene Propylene Diene Terpolymer

Thermoplastic vulcanizates nanocomposites based on polypropylene (PP) and ethylene–propylene-diene terpolymer rubber (EPDM) blends reinforced with organoclay modified montmorillonite have been prepared via melt intercalation. The silicate layers of the clay were intercalated and dispersed at a nanometer level in the matrix blends. The nanocomposites exhibit improved mechanical properties, this effect being more evident at high EPDM contents in the blend (above 80%). This behavior is attributed to the fact that the EPDM chains are more easily inserted into the galleries silicate, giving rise to a more intercalated structure as was observed by X-ray diffraction.

Strengthening effect of Mullins effect of high- density polyethylene/ethylene–propylene–diene terpolymer thermoplastic vulcanizates under compression mode

2017 ◽  
Vol 31 (10) ◽  
pp. 1310-1322 ◽  
Author(s):  
Qingqing Liu ◽  
Kai Zhang ◽  
Xingshuo Zhang ◽  
Zhaobo Wang
Keyword(s):  
High Density Polyethylene ◽  
Residual Deformation ◽  
High Density ◽  
Mullins Effect ◽  
Strengthening Effect ◽  
Compression Stress ◽  
Dynamic Vulcanization ◽  
Ethylene Propylene ◽  
Thermoplastic Vulcanizates ◽  
Ethylene Propylene Diene Terpolymer

Thermoplastic vulcanizates (TPVs) based on high-density polyethylene (HDPE)/ethylene–propylene–diene terpolymer (EPDM) were prepared via dynamic vulcanization. The mechanical properties and strengthening effect of Mullins effect under compression mode were investigated systematically. Experimental results indicated that the compression strength of TPVs was enhanced greatly compared with that of EPDM vulcanizate. Mullins effect could be observed obviously in the compression stress–strain curves of the TPVs while it was hardly to obverse in that of EPDM vulcanizate during the uniaxial loading–unloading cycles. The maximum compression stress and internal friction loss at specific strain were decreased after the first loading–unloading while only decreased slightly at the later loading–unloading cycles; however, the residual deformation increased with the increasing of the cycle times of compression. Mullins effect could be significantly enhanced with increasing compression strain and HDPE content in TPV.

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