Characterization of thermoplastic interpenetrating polymer networks by various thermal analysis techniques
- Thermochimica Acta, 371(1-2), p.87-93, 2010 .
Thermoplastic interpenetrating polymer networks (t-IPNs), prepared by melting and pressing of crystallizable polyurethane (CPU)and styrene/acrylic acid random copolymer (S/AA)in wide ranges of composition, were investigated by the combination of various thermal analysis techniques: differential scanning calorimetry (DSC), thermomechanical analysis (TMA), thermally stimulated depolarization currents (TSDC)and thermally stimulated conductivity (TSC)measurements, as well as broadband dielectric relaxation spectroscopy (DRS). The results show that the t-IPNs under investigation are microheterogeneous systems with contributions to microheterogeneity from both the heterogeneity of the individual polymers and the thermodynamic incompatibility of the components.