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Polímeros

versão impressa ISSN 0104-1428

Resumo

NUNES, Edilene de Cássia D; BABETTO, Alex S  e  AGNELLI, José Augusto M. Correlation between the thermooxidative behavior of polypropylene (PP) and low density polyethylene (LDPE) and the type of surface tratment of carbon black. Polímeros [online]. 1997, vol.7, n.2, pp.66-68. ISSN 0104-1428.  http://dx.doi.org/10.1590/S0104-14281997000200009.

Carbon black (CB) is very used as photoprotective additive in thermoplastic polymers, particularly Low Density Polyethylene (LDPE) and Polypropylene (PP). The thermooxidative stabilization behavior of carbon black modified superficially was studied, complementing its characterization as photostabilizing agent. To increase the carbon black acid character, its surface has been modified by hydrogen peroxide and nitric acid oxidation. The result of this thermooxidative stabilization was positive for LDPE but it was negative for PP.

Palavras-chave : Carbon black; LDPE; PP; thermooxidation; thermostabilization.

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