TY - JOUR
T1 - High field dielectric properties of clay filled silicone rubber composites
AU - Sarkarat, Maryam
AU - Lanagan, Michael
AU - Ghosh, Dipankar
AU - Lottes, Andrew
AU - Budd, Kent
AU - Rajagopalan, Ramakrishnan
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/6
Y1 - 2020/6
N2 - The present research work was aimed at improving the high field dielectric properties of silicone rubber (SR) composites used for power cable insulation. Liquid silicone rubber composites were developed using two types of clays as filler materials; organically modified montmorillonite (ommt) and calcined, surface treated kaolin with the commercial name Translink 37 (T37). The results revealed that the surface chemistry of the clay had a distinct effect on both dispersion as well as electrical performance of silicone rubber-clay composites. We observed that surface treated kaolin (T37) were well dispersed in the SR matrix, but had adverse impact on the crosslinking kinetics of liquid silicone rubber resulting in higher dielectric loss at low frequencies. On the other hand, organically modified clay showed poor dispersion in the silicone rubber matrix while exhibiting much lower dc conductivity characteristics at high temperature. The agglomerated ommt macroparticles introduced the interfacial traps in SR matrix and charge carriers migration was limited within the matrix.
AB - The present research work was aimed at improving the high field dielectric properties of silicone rubber (SR) composites used for power cable insulation. Liquid silicone rubber composites were developed using two types of clays as filler materials; organically modified montmorillonite (ommt) and calcined, surface treated kaolin with the commercial name Translink 37 (T37). The results revealed that the surface chemistry of the clay had a distinct effect on both dispersion as well as electrical performance of silicone rubber-clay composites. We observed that surface treated kaolin (T37) were well dispersed in the SR matrix, but had adverse impact on the crosslinking kinetics of liquid silicone rubber resulting in higher dielectric loss at low frequencies. On the other hand, organically modified clay showed poor dispersion in the silicone rubber matrix while exhibiting much lower dc conductivity characteristics at high temperature. The agglomerated ommt macroparticles introduced the interfacial traps in SR matrix and charge carriers migration was limited within the matrix.
UR - http://www.scopus.com/inward/record.url?scp=85078440301&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85078440301&partnerID=8YFLogxK
U2 - 10.1016/j.mtcomm.2020.100947
DO - 10.1016/j.mtcomm.2020.100947
M3 - Article
AN - SCOPUS:85078440301
SN - 2352-4928
VL - 23
JO - Materials Today Communications
JF - Materials Today Communications
M1 - 100947
ER -