Analysis of the mechanical properties and characterization by solid state 13C NMR of recycled EVA copolymer/silica composites

Materials Research

Giovanni Chaves Stael²  Marisa Cristina Guimarães Rocha¹  Menezes Sônia Maria Cabral De¹  José Roberto Morais D'almeida¹  Naira Machado Da Silva Ruiz¹ 

[1] ,DGE Observatório Nacional Rio de Janeiro RJ ,Brazil

关键词: EVA;    composite;    recycling;    NMR;   

DOI  :  10.1590/S1516-14392005000300008

来源: SciELO

【 摘 要 】

The incorporation of micrometer sized silica particles on poly (ethylene-co-vinyl acetate) - EVA - residues from the footwear industry was evaluated. The effects of the processing parameters - temperature and mixing ratio - on the mechanical behavior of molded plates of neat recycled EVA and EVA/silica composites were also investigated. The mechanical properties measured by the tensile test, the fractographic analysis by scanning electron microscopy (SEM), and the 13C Nuclear Magnetic Resonance (NMR) showed a reduced EVA to silica compatibility. Therefore, incorporation of untreated silica to recycled EVA copolymer produced a slight decrease on the mechanical performance of EVA/silica composites in respect to neat EVA copolymer. The NMR analysis also shows that the crosslinking process on recycled EVA may be occurring at the carbonyl group.

【 授权许可】

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