| Popis: |
In order to obtain natural rubber (NR) latexbased biomaterial, the NR latex concentrate was prepared into prevulcanized natural rubber latex (SNRL) and then blended with a water dispersion of chitosan (CS) and poly(3hydroxybutyrate) (PHB) together, with the total amount of CS and PHB is of 1, 3, 5, 10 parts per hundred rubber (phr) , and CS and PHB is of a ratio of 1:1; the SNRL was also blended with a water dispersion of CS or PHB only in the same amount for properties comparison. The mechanical properties including the tensile strength, elongation at break, 300% modulus, tear strength and hardness of the 24h waterleached SNRL/CS/PHB, SNRL/CS or SNRL/PHB films were tested. The results indicated that, the tensile strength first increased with increase in CS/PHB, CS or PHB content up to 1.0 phr then decreased, the elongation at break decreased, the 300% modulus, tear strength and Shore A hardness increased, with increase in CS/PHB, CS or PHB content, whereas most of the tensile strength and elasticity of the films can be retained when the content of CS/PHB, CS or PHB was less than 5.0 phr. Keywords-natural rubber latex; chitosan; poly(3hydroxybutyrate); blend; mechanical properties. |
