Seminar Details

Seminar Title
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Processing, Characterization and Flammability Behavior of Coir Fiber/Sirisha Bark Filler Reinforced Hybrid Polymer Composites
Seminar Type
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Synopsis Seminar
Department
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Mechanical Engineering
Speaker Type
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Student
Speaker Name
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TANMAYEE KHUNTIA ( RollNo : 517ME8006)
Date  &  Time
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09 Apr 2021  11AM
Venue
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Online MS TEAMS Portal (Team code: ezekzsr)
Contact
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Prof. Sandhyarani Biswas
Abstract
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Recently, the natural fibers are replaced the synthetic fibers to a great extent as reinforcement to the polymer composites. Among the natural fibers, coir fiber has the potential to be used in various applications because of its abundant availability, non-toxicity, low cost, and resilient properties. Coir fiber has high lignin content that makes it a preferable reinforcement in the development of polymer composites to enhance the flame resistant properties. Generally, the polymeric materials are susceptible to flame. That is why it is essential to measure the performance of polymer composites prior to their applications in construction, automotive parts, etc. The neat polypropylene (PP) is extremely sensitive to flame and therefore it is a challenging task for the researchers to reduce the flammability properties of PP based composites. Though, the artificial flame retardant fillers reduce the flame propagation, but these are hazardous, costly, not environment friendly and they reduce the mechanical strength of the polymer composites upon higher loading. To overcome this difficulty, in this work the novel natural Sirisha bark filler is reinforced as flame retardant filler to the coir fiber reinforced PP composites. The objective of the present investigation is to study the mechanical and flammability properties of coir fiber/Sirisha bark filler based polypropylene (PP) hybrid composites. The dynamic mechanical behavior, thermal stability and wettability properties of composites are also studied. The hybrid composites provide satisfactory flammability along with the mechanical properties at lower filler loading without any compatibilizer. The 10 wt. % bark filler reinforced composites attain V-0 rating with zero flame propagation speed. The time to ignite (TTI) of the hybrid composites increases due to the bark filler reinforcement in comparison to neat PP. The impact strength also increases with the bark filler loading. The thermal stability of the hybrid composites increases due to the bark filler loading than the neat PP and the coir fiber/PP composites. The SEM micrographs shows the well-defined grain boundaries of the composites that reveals strong bond of the bark filler with PP matrix. The char morphology conforms the formation of carbonaceous char coating over the hybrid composites surface that act as hindrance to flame.