Novel system with damage initiated autonomous healing property based on heterogeneous blends of ethylene-methacrylic acid ionomer |
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Authors: | Maurizio Penco Arifur RhamanGloria Spagnoli Gerardus JanszenLuca Di Landro |
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Affiliation: | a Dipartimento di Ingegneria Meccanica e Industriale, Università di Brescia, Via Valotti 9, 25123 Brescia, Italyb Dipartimento di Ingegneria Aerospaziale, Politecnico di Milano, via La Masa 34, 20156, Milano, Italy |
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Abstract: | Self-healing behavior of ionomer blends containing both rapidly crystallizing phase and with higher amount of amorphous phase has not yet been studied. This work gives a new insight to understand the development of materials with intrinsic self-healing property. In particular, binary blends based on poly(ethylene-co-methacrylic acid sodium salt) (EMNa)/Poly(vinyl alcohol-co-ethylene) (EVA) and epoxidized natural rubber (ENR), were studied by ballistic puncture tests. In the composition range explored (15-50 wt.% of EVA and ENR), the self-healing characteristics decrease with the increasing amount of EVA but are maintained in all ranges for ENR/EMNa blends. The ballistic damage initiated autonomous healing was observed by optical microscopy and the healing was further analyzed by thermal and mechanical behaviors of the blend materials. |
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Keywords: | Self-healing materials Poly(ethylene-co-methacrylic acid sodium salt) Poly(vinyl alcohol-co-ethylene) Epoxidized natural rubber Ballistic puncture Blend |
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