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Synergistic effects of graphene nanoplatelets in thermally conductive synthetic graphite filled polypropylene composite
Author(s) -
Altay Lutfiye,
Atagur Metehan,
Sever Kutlay,
Sen Ibrahim,
Uysalman Tugce,
Seki Yoldas,
Sarikanat Mehmet
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24643
Subject(s) - materials science , composite material , flexural strength , polypropylene , ultimate tensile strength , composite number , flexural modulus , graphite , thermal conductivity , izod impact strength test , dynamic mechanical analysis , thermal stability , thermal expansion , polymer , physics , quantum mechanics
Polypropylene (PP) was filled with synthetic graphite (SG) and graphene nanoplatelets (G) at different weight fractions. Composites were prepared by the melt mixing process by using a co‐rotating twin screw extruder. Mechanical tests were carried out to determine tensile and flexural properties of composites. Dynamic Mechanical Analysis of composites was performed to determine their thermo‐mechanical properties, such as storage modulus and loss modulus. Scanning Electron Microscopy was used to observe the fracture surfaces of the composites after tensile tests. The effect of SG and G on thermal properties such as melting and crystallization temperature, thermal conductivity, thermal stability, and coefficient of thermal expansion of PP was investigated. Tensile strength and flexural strength of PP increased with the addition of 10 wt% SG. The highest thermal conductivity achieved in this study at 50 wt% SG and 3 wt% G loading was 4.6 W/mK. POLYM. COMPOS., 40:277–287, 2019. © 2018 Society of Plastics Engineers