TY - JOUR
T1 - Improvement of mechanical and dielectrical properties of ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3) by layered mica and graphite flakes
AU - Su, Jun
AU - Zhang, Jun
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/3/1
Y1 - 2017/3/1
N2 - In this study, ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3)/mica (or graphite) composites with different volume fraction of mica (or graphite) were prepared by two-roll milling process. Thermal conductivity, crosslink density, cure, rheological, mechanical and dielectrical properties of composites were investigated. The results of rheological properties indicated that the 15 vol% mica made the complex viscosity of EPDM/BaTiO3 compound to become non-sensitive to varying shear. In terms of mechanical properties, only 5 vol% graphite flakes remarkably improved the tensile strength of EPDM/BaTiO3 (70/30) from 7.47 MPa to 13.20 MPa (76% increase). By comparison, the 20 vol% mica just increased the tensile strength of EPDM/BaTiO3 (70/30) to 12.10 MPa. In addition, 20 vol% graphite flakes boosted the thermal conductivity and dielectric constant of EPDM/BaTiO3 (70/30) from 0.323 W m−1 K−1 and 7.1 at 40 MHz to 2.421 W m−1 K−1 (749% increase) and 70 at 40 MHz (almost 1000% increase), respectively. The excellent electric and thermal performance was attributed to the mobile π electrons in graphite flakes.
AB - In this study, ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3)/mica (or graphite) composites with different volume fraction of mica (or graphite) were prepared by two-roll milling process. Thermal conductivity, crosslink density, cure, rheological, mechanical and dielectrical properties of composites were investigated. The results of rheological properties indicated that the 15 vol% mica made the complex viscosity of EPDM/BaTiO3 compound to become non-sensitive to varying shear. In terms of mechanical properties, only 5 vol% graphite flakes remarkably improved the tensile strength of EPDM/BaTiO3 (70/30) from 7.47 MPa to 13.20 MPa (76% increase). By comparison, the 20 vol% mica just increased the tensile strength of EPDM/BaTiO3 (70/30) to 12.10 MPa. In addition, 20 vol% graphite flakes boosted the thermal conductivity and dielectric constant of EPDM/BaTiO3 (70/30) from 0.323 W m−1 K−1 and 7.1 at 40 MHz to 2.421 W m−1 K−1 (749% increase) and 70 at 40 MHz (almost 1000% increase), respectively. The excellent electric and thermal performance was attributed to the mobile π electrons in graphite flakes.
KW - Barium titanate (BaTiO)
KW - Dielectric constant and loss
KW - Ethylene propylene diene monomer (EPDM)
KW - Mechanical properties
KW - Thermal conductivity
KW - Volume resistivity
UR - http://www.scopus.com/inward/record.url?scp=85009469015&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2017.01.002
DO - 10.1016/j.compositesb.2017.01.002
M3 - 文章
AN - SCOPUS:85009469015
SN - 1359-8368
VL - 112
SP - 148
EP - 157
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -