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Development of thermally conductive and high‐specific strength polypropylene composites for thermal management applications in automotive
Author(s) -
Gogoi Rupam,
Manik Gaurav
Publication year - 2021
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.25947
Subject(s) - materials science , polypropylene , composite material , thermal stability , composite number , thermal conductivity , maleic anhydride , rheology , silane , dispersion (optics) , polymer , copolymer , chemical engineering , engineering , physics , optics
This study reports the preparation of multifunctional hybrid composites based on polypropylene (PP) for potential thermal management applications in automotive. Short carbon fiber (CF) at 5 and 8 wt%, and silane‐treated hollow glass microsphere (HGM) at 5, 10, 20, 30, and 40 wt% were incorporated separately in PP along with maleic anhydride‐grafted‐polypropylene (MA‐g‐PP). The interplay of filler content and its dispersion and distribution had a significant effect on the thermal conductivity ( K c ) of the composites. Highest K c of 1.20 W/m K was obtained for a CF and HGM wt% of 5 and 20, respectively. The rheological analysis revealed improved flowability as the complex viscosity of composites up to 20 wt% of HGM content was found to be less than PP. The thermal stability improved upon HGM incorporation and the highest thermal stability of ~26°C higher than that for PP was exhibited by hybrid composite with 8 wt% CF and 40 wt% HGM. Furthermore, Nielsen model demonstrated to be the closest fit for the experimental thermal conductivity value of hybrid composites among various micromechanical models used.