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  • 1 Technical University of Catalonia, EUETIT Department of Chemical Engineering Colom 1 08222 Terrassa, Barcelona Spain
  • | 2 Universitat de Girona EPS Campus Montilivi s/n 17071 Girona Spain
  • | 3 Universitat Autònoma de Barcelona Departament de Química, Unitat Analítica, Centre GTS, Facultat de Ciències Edifici C 08193 Bellaterra, Barcelona Spain
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Abstract  

In the present work Lyocell fibers were subjected to graft copolymerization of poly-N-isopropylacrylamide (pNIPAAm) thermosensitive polymer. The thermal degradation and stability of lyocell/pNIPAAm copolymers gels were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). pNIPAAm/lyocell copolymers are thermally stable and more resistant to temperature than lyocell fibres. Thermal characterization was analyzed as a function of percentage by mass of the pNIPAAm grafted. It has been shown that for pNIPAAm/lyocell copolymers, degradation occurs at higher temperature when increasing the degree of grafting.