The invention relates to the technical field of
high polymer materials, and discloses a preparation method of a modified master batch degradable material and application of the modified master batch degradable material in a packaging lunch box, and the modified master batch degradable material comprises the following components by
mass: 75.0-93.8 parts of poly (butylene succinate); 5.0 to 20.0 parts of aliphatic series-aromatic
copolyester; 1.0 to 4.0 parts of 1, 1 '-methylenebis-4, 1-
phenylene-bismaleimide, and 1.0 to 4.0 parts of 1, 1'-methylenebis-4, 1-
phenylene-bismaleimide; 0.5 to 2.0 parts of talcum
powder; the method comprises the following steps: mixing dried poly (butylene succinate), aliphatic-aromatic
copolyester, bismaleimide and talcum
powder, performing
reactive extrusion and
melt mixing through a twin-screw extruder, and then cooling,
pelletizing and
drying the extrudate. Through specific components and a
reactive extrusion process, a dynamic cross-linked network is formed by utilizing a Diels-
Alder reaction, and the modified master batch degradable material of which the comprehensive
mechanical property and the
heat resistance are remarkably improved is prepared.