PHA-MODIFIED PPC/PBAT BIODEGRADABLE RESIN AND PREPARATION METHOD THEREFOR

摘要

A PHA-modified PPC/PBAT biodegradable resin, prepared by the following raw materials in parts by weight: PPC: 20-40 parts; PBAT: 30-50 parts; and PHA 10-30 parts. Also disclosed is a preparation method for the PHA-modified PPC/PBAT biodegradable resin. The PHA, PPC, and PBAT are all aliphatic resins, are biodegradable raw materials, and are respectively well-characterized. The PPC is prepared by polymerizing carbon dioxide generated by the fermentation of raw materials during brewing. The PHA and PPC are blended according to a given ratio, and are extruded to form a blend resin, such that the range of crystallization temperature is widened and the glass transition temperature (T_g) is increased. Due to the high ductility of the PPC, the blend resin resolves the problem of the frangibility of the PHA and therefore has significantly improved impact resistance and toughness. Detection data indicates that: when the mass fraction of the PPC reaches 60%, the weak adaptability of the PHA can be improved by 200%; and after the mixture is blended with PBAT for granulation, the obtained resin has comprehensive mechanical properties and is particularly suitable for the preparation of thin-film products.