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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

NARDI, Sinara Queli Welter; TEIXEIRA, Sirlei Dias  e  PARABOCZ, Cristiane Regina Budziak. A source of nitrogen incorporation in particulate PVA and sodium alginate and study of the influence of freezing/thawing cycles in the characterization of the product. Polímeros [online]. 2015, vol.25, n.6, pp.606-613. ISSN 1678-5169.  https://doi.org/10.1590/0104-1428.1967.

In this work two nitrogen sources (urea and urea intercalated kaolinite) were incorporated in the polymer matrix polyvinyl alcohol and sodium alginate in the ratio of 3: 1, using the methodology drip in CaCl2. The particles were subjected to freezing and subsequent thawing in order to improve the structure and thermal resistance of the polymer matrix. The particles were characterized by elemental analysis, FTIR, XRD, and thermal analysis. The particles that showed the best formulations were those of polyvinyl alcohol+sodium alginate+urea, because they showed the efficiency of incorporation nearby particles polyvinyl alcohol+sodium alginate+urea intercalated kaolinite, but with greater thermal stability, about 200 °C.

Palavras-chave : polyvinyl alcohol; sodium alginate; cycles of freeze/thawing; incorporation of nitrogen; urea.

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