Fabrication of MA-EPDM grafted MWCNTs by reactive extrusion for enhanced interfacial adhesion and mechanical properties of PP/MA-EPDM composite
- Authors
- Choi, E.Y.; Kim, Chang Keun; Park, C.B.
- Issue Date
- Aug-2022
- Publisher
- Elsevier Ltd
- Keywords
- Extrusion; Impact behavior; Interface/interphase; Polymer-matrix composites (PMCs)
- Citation
- Composites Part B: Engineering, v.242
- Journal Title
- Composites Part B: Engineering
- Volume
- 242
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58521
- DOI
- 10.1016/j.compositesb.2022.110043
- ISSN
- 1359-8368
1879-1069
- Abstract
- Maleic anhydride modified ethylene-propylene-diene tripolymer (MA-EPDM) is an efficient toughening agent for other polymers such as polypropylene (PP). However, the rubber toughened plastics always exhibit a trade-off between stiffness and toughness. In this study, PP/MA-EPDM blend had functionalized multi-walled carbon nanotubes (MWCNTs) incorporated for reinforcement of both stiffness and toughness. PP and MA-EPDM were melt-extruded with amine group functionalized MWCNTs. During the extrusion, MA-EPDM was grafted to the MWCNTs by the reaction between MA and amine groups (MWCNTs-g-MA-EPDM), resulting in the fabrication of PP/MA-EPDM/MWCNTs-g-MA-EPDM composite. The MWCNTs-g-MA-EPDM were extracted from the composite by dissolving and removing PP and unreacted MA-EPDM using a solvent to characterize resulting properties. The interfacial adhesion of MWCNTs-g-MA-EPDM to PP and MA-EPDM blend was characterized by using a drop-on-fiber method. The MWCNTs-g-MA-EPDM exhibited enhanced interfacial adhesion and better MWCNT dispersion in the composite compared to the pristine MWCNTs. As a result, the PP/MA-EPDM/MWCNTs-g-MA-EPDM composite exhibited the highest tensile strength, tensile modulus and impact strength of the composites examined. © 2022 Elsevier Ltd
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