Produção Nacional
Revisado por pares
Preparation and thermal study of polymers derived from acrylamide
2000; Elsevier BV; Volume: 67; Issue: 3 Linguagem: Inglês
10.1016/s0141-3910(99)00149-4
ISSN1873-2321
AutoresMaria Elisa S.R.e Silva, Eider Reis Dutra, Valdir Mano, José C. Machado,
Tópico(s)Polymer Nanocomposites and Properties
ResumoPolyacrylamide (PAA) and some of its N-alkyl substituted derivatives have been synthesised and characterised using thermal analysis. Thermal stability was studied by thermogravimetry (TG) and differential scanning calorimetry (DSC) was used to determine the glass transition temperatures (Tg). The results showed an increase in degradation temperature (Td) as the hydrogens of the amide nitrogen were replaced by alkyl groups. An opposite tendency was verified for Tg values. The observed increase in Td values is discussed in terms of the formation of an intermediate ion in the degradation, while the decrease in Tg values is discussed in terms of polymer–polymer interactions such as hydrogen bonds.
Referência(s)