Preparation and Properties of Polyvinyl Alcohol/Carboxymethyl Chitosan Blend Films

In order to improve the mechanical properties of the carboxymethyl chitosan(CMCT)film,the blend films of CMCT/ polyvinyl alcohol(PVA)with different blending ratios were prepared by solution-mixing method.The morphological structures of the films were observed with scanning electronic microscopy,and the structures were researched and characterized by means of different scanning calorimeter(DSC)and Fourier transform infrared spectrometer(FT-IR).The mechanical properties of the blend films were determined.As a result,there were some interaction between PVA and CMCT,which showed that introduction of PVA was helpful to improve mechanical property of CMCT.The best values of the tensile strength achieved 49 MPa when the mass ratio of CMCT and PVA was 40∶60.