SciELO - Scientific Electronic Library Online

 
vol.20 número1Estudo do envelhecimento de poliuretanos aplicados na indústria de petróleoAvaliação da morfologia e propriedades termo-mecânicas em nanocompósitos de PVC índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428

Resumo

MORALES, Ana R.; CRUZ, Carolina V. M. da; PERES, Leila  e  ITO, Edson N.. PEAD/PEBDL composites: evaluation of the exfoliation of organophilic clay using the Nielsen model and of the mechanical, optical and permeability properties. Polímeros [online]. 2010, vol.20, n.1, pp.39-45.  Epub 05-Fev-2010. ISSN 0104-1428.  https://doi.org/10.1590/S0104-14282010005000004.

A typical high density polyethylene and linear low density polyethylene (HDPE/LLDPE) blend used in flexible packaging was modified with commercial organophylic montmorilonite clay to obtain nanocomposites with superior barrier properties. Samples with 5 and 7.5% of clay were prepared under different processing conditions. Films produced from the nanocomposites were evaluated in terms of oxygen and water vapor permeation and also by X-ray diffraction and Transmission Electron Microscopy. Tensile and optical properties were also evaluated. The clay showed to be intercalated and partially exfoliated. The oxygen permeation was mainly reduced and the vapor permeation was weakly modified. The mechanical properties and transparency did not change significantly. Nielsen's model was applied considering the relative permeability coefficient. This method was able to give an estimate of the exfoliation state of the samples, supported by the transmission electron microscopy.

Palavras-chave : Nanocomposites; montmorillonite; barrier properties; polymeric blends.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons