The invention discloses a PLA modified material as well as a preparation method and application thereof, and belongs to the field of
biodegradation. Aiming at the problems of short
shelf life and insufficient performance of the existing PLA material product, the invention provides a PLA modified material which comprises the following components in parts by weight: 50-70 parts of PLA; 20 to 50 parts of an inorganic material; 3-5 parts of a
plasticizer; 0.01 to 1 part of a compatilizer; 0.1 to 1 part of a
lubricant; 0.1 to 1 part of an
antioxidant; the invention relates to a PBST
polymer, a preparation method of the PBST
polymer is improved, raw materials for forming the PBST
polymer are added in sequence, and one of the raw materials is recycled. According to the invention, the PBST polymer and the PLA are blended, and the complementarity of the PBST polymer and the PLA is fully utilized to obtain the
composite material with high strength and good
toughness; the PBST polymer is used for
toughening the PLA, so that the use performance of the PLA material during freezing or
cold storage is improved, the
crystallization property and
heat resistance of the PLA material are promoted, the overall performance of the PLA material is improved, and the
shelf life of a PLA product can be remarkably prolonged.