The Structure and Properties of Chitosan/Nylon6/Polyurethane Ternary Blends

The ternary blends consisting of Chitosan (CS), Nylon6 (Ny6) and Polyurethane foam (PUF) were prepared by solution blending method. The Structural, thermal and morphological studies were performed by Fourier transform infrared spectroscopy (FTIR), Thermo gravimetric analysis (TGA), X-ray diffraction (XRD) and Scanning electron microscope (SEM). The FTIR results showed intermolecular hydrogen bonds took place between CS, Ny6 and PUF. TGA studies reveal that the thermal stability of the uncross linked blend is higher than cross linked blend. Results of X-ray diffraction indicated that the intensity of diffraction peak at 2θ = 20o of CS and PUF become lower in uncross linked blends. In EG-CS/Ny6/PUF blend the diffraction peaks of CS and PUF at 2θ = 20o become wider and shifted to 23o indicating the amorphous nature and weak interaction between the constituent polymers. Morphologies of these blends were viewed using scanning electron microscopy; the studies revealed that rough and heterogeneous surface for uncross linked blend and a distinct phase separation with high porosity for cross linked blends.