Polylactic acid modified material and preparation method thereof
A modified material, polylactic acid technology, applied in the field of polylactic acid modified material and its preparation, can solve the problems of poor toughness and limited wide application, and achieve the effect of improved elongation at break and excellent tensile properties
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Embodiment 1
[0018] Embodiment 1: A polylactic acid modified material, the modified material includes: polylactic acid: 40% by mass; polyether polyamide elastomer: 30%; montmorillonite: 30%; prepare a polylactic acid When modifying materials, first dry the polylactic acid and polyether polyamide elastomer in a vacuum oven at 70°C for 24 hours, and dry the montmorillonite in a vacuum oven at 100°C for 24 hours, then dry the polylactic acid, polyether type The polyamide elastomer and montmorillonite were melt-blended in a twin-screw blender, the blending temperature was 170°C, the screw speed of the twin-screw blender was 50 rpm, and the blending time was 5 minutes to prepare a blending system , after drying the blended system, the modified material was prepared by injection molding with an injection molding machine. The barrel temperature of the injection molding machine was 175° C., the mold temperature was 50° C., and the injection molding cycle was 40 seconds.
Embodiment 2
[0019] Embodiment 2: A polylactic acid modified material, the modified material includes by mass percentage: polylactic acid: 70; polyether polyamide elastomer: 15; montmorillonite: 15; preparation of polylactic acid modified For materials, first dry polylactic acid and polyether polyamide elastomer in a vacuum oven at 70°C for 24 hours, and dry montmorillonite in a vacuum oven at 100°C for 24 hours, then dry polylactic acid, polyether polyamide The elastomer and montmorillonite were melt-blended in a twin-screw blender, the blending temperature was 175°C, the screw speed of the twin-screw blender was 70rpm, and the blending time was 8 minutes to prepare a blending system. After the blending system was dried, the modified material was prepared by injection molding with an injection molding machine. The barrel temperature of the injection molding machine was 180° C., the mold temperature was 50° C., and the injection molding cycle was 50 seconds.
Embodiment 3
[0020] Embodiment 3: A polylactic acid modified material, the modified material includes: polylactic acid: 82; polyether polyamide elastomer: 9; montmorillonite: 9; preparation of polylactic acid modified For materials, first dry polylactic acid and polyether polyamide elastomer in a vacuum oven at 70°C for 24 hours, and dry montmorillonite in a vacuum oven at 100°C for 24 hours, then dry polylactic acid, polyether polyamide The elastomer and montmorillonite were melt-blended in a twin-screw blender, the blending temperature was 180°C, the screw speed of the twin-screw blender was 80 rpm, and the blending time was 8 minutes to prepare a blending system. After the blending system was dried, the modified material was prepared by injection molding with an injection molding machine. The barrel temperature of the injection molding machine was 180° C., the mold temperature was 50° C., and the injection molding cycle was 50 seconds.
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