Thermal properties and reactions between poly(3-hydroxybutyrate)/functionalized ethylene copolymer blends

摘要

Some properties modifications of poly(3bydroxybutyrate), P(3HB), by blending with ethylene-methacrylic acid copolymers either in the acid form (I-H) or partially neutralized with Zn (I -Zn) were investigated in an internal mixer. Thermal properties and the reactions between the polymers were evaluated by DSC, SEC and FTIR. A significant change in the crystallinity degree was noticed in blends containing I-Zn. The FTIR analysis of the chloroform soluble and insoluble fractions presented evidences of chemical reactions between the components during melt mixing. A significant amount of P(3HB) became insoluble in the P(3HB)/I-Zn blend, showing in this ease that the reactions have occurred in significant degree.