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Effect of functionalization on the performance of MWCNTs with thermosetting polymers

Effect of functionalization on the performance of MWCNTs with thermosetting polymers Shaik Jeelani, Tuskegee University, DMR 0611612. Participants: Mahesh V. Hosur, Chinedu Okoro, M. B. A. Salaam, Muhammad Rahman, Nusrat Jahan, Micah Jones, Myron Fletcher (TU), Anil Netravali (CU).

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Effect of functionalization on the performance of MWCNTs with thermosetting polymers

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  1. Effect of functionalization on the performance of MWCNTs with thermosetting polymers Shaik Jeelani, Tuskegee University, DMR 0611612 Participants: Mahesh V. Hosur, Chinedu Okoro, M. B. A. Salaam, Muhammad Rahman, Nusrat Jahan, Micah Jones, Myron Fletcher (TU), Anil Netravali (CU) Objective of this study is to study the influence of functionalization of MWCNTs on the performance of nanocomposites. Approach: In this work, thermoset polymers were modified with pristine and amine functionalized MWCNTs. Thermal, thermomechanical and mechanical characterization was carried out. a b Nanophased epoxy Findings: • Incorporation of polyether polyol in epoxy system increased fracture toughness up to 20% and strain energy up to 60% at 10 phr loading with a reduction of about 9% in flexural strength and stiffness, respectively. • NH2-MWCNTs incorporation at a very low concentration in polyol/epoxy composites increased flexural properties of composites as well as fracture toughness significantly. Flexural test results indicate maximum improvement in strength, modulus and strain energy of about 18%, 16% and 99%, respectively at 0.3 wt. % loading of MWCNTs in 10 phr polyol/epoxy nanocomposites. • A combination of mechanisms including particle cavitation, shear yielding, plastic deformation due to polyol-toughening and crack deflection, inability to break nanotubes, energy absorption by nanotubes pull-out due to MWCNTs may induce a synergistic approach to improve the ductility and other properties as well in epoxy systems. SEM micrographs of fracture surfaces: (a) pristine epoxy, (b) CNT/10 phr polyol/epoxy

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