TY - JOUR
T1 - Dynamically vulcanized blends of UHM-EPDM and polypropylene
T2 - Role of nano-fillers improving thermal and rheological properties
AU - Bhattacharya, Asit Baran
AU - Chatterjee, Tuhin
AU - Naskar, Kinsuk
N1 - Funding Information:
The authors would like to acknowledge ARLANXEO, The Netherlands, for providing the special UHM-EPDM rubber. Authors are also thankful to Department of Chemical Engineering, University of Groningen, Groningen, The Netherlands for the Parallel plate rheometer testing. Authors also thank Sanjay Pal, Aswathy T. R. Anagha M. G. Mithun Das, Sreethu T. K. Jeevanandham N. and Rajesh De for their kind support.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12
Y1 - 2020/12
N2 - The effect of the addition of various types of nano-fillers on the viscoelastic properties of the dynamically vulcanized ultra-high molecular weight EPDM (UHM-EPDM)/Polypropylene (PP) was studied in details. The authors have studied the molten state viscoelastic properties at 180 °C by dynamic strain sweep (SS) and also stress relaxation (SR) through Rubber process Analyzer (RPA). The results of the SS and SR indicates that due the addition of the nano-silica to the blends resulting higher Storage modulus (Gʹ) and slower rate of relaxation than the pristine blend and nano-clay added blends. In the parallel plate rheometer frequency sweep study (FS), authors have noticed that nano-silica added blends are showing similar trends like SS study (in RPA) and all the blends are following pseudoplastic type flow behaviour. In the Cole-Cole plot, it is found that there is no semi-circular nature of the ηʹʹ vs ηʹ curve, and it indicates the immiscibility of the blends. In the thermal characterization, it is observed that there is a change in temperature in the thermal degradation study (TGA) about ̴ 5 °C and as the nano-filler amount are increasing the degradation temperature also improving. This special type of UHM-EPDM based TPVs exhibit superior physico-mechanical properties over conventional EPDM based TPVs and in presence of nano-fillers, they show even better physical properties. These newly developed TPVNs can be applied in aesthetic seals/strips, smaller injection moulded parts and 2K-moulds with PP in automotive.
AB - The effect of the addition of various types of nano-fillers on the viscoelastic properties of the dynamically vulcanized ultra-high molecular weight EPDM (UHM-EPDM)/Polypropylene (PP) was studied in details. The authors have studied the molten state viscoelastic properties at 180 °C by dynamic strain sweep (SS) and also stress relaxation (SR) through Rubber process Analyzer (RPA). The results of the SS and SR indicates that due the addition of the nano-silica to the blends resulting higher Storage modulus (Gʹ) and slower rate of relaxation than the pristine blend and nano-clay added blends. In the parallel plate rheometer frequency sweep study (FS), authors have noticed that nano-silica added blends are showing similar trends like SS study (in RPA) and all the blends are following pseudoplastic type flow behaviour. In the Cole-Cole plot, it is found that there is no semi-circular nature of the ηʹʹ vs ηʹ curve, and it indicates the immiscibility of the blends. In the thermal characterization, it is observed that there is a change in temperature in the thermal degradation study (TGA) about ̴ 5 °C and as the nano-filler amount are increasing the degradation temperature also improving. This special type of UHM-EPDM based TPVs exhibit superior physico-mechanical properties over conventional EPDM based TPVs and in presence of nano-fillers, they show even better physical properties. These newly developed TPVNs can be applied in aesthetic seals/strips, smaller injection moulded parts and 2K-moulds with PP in automotive.
KW - Nano-filler
KW - Polypropylene
KW - Rheological characteristics
KW - Thermoplastic elastomer
KW - UHM-EPDM
UR - http://www.scopus.com/inward/record.url?scp=85088900819&partnerID=8YFLogxK
U2 - 10.1016/j.mtcomm.2020.101486
DO - 10.1016/j.mtcomm.2020.101486
M3 - Article
AN - SCOPUS:85088900819
SN - 2352-4928
VL - 25
JO - Materials today communications
JF - Materials today communications
M1 - 101486
ER -