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Engineering plastic molded product with high impact resistance and high bio-based content and preparation method thereof

An engineering plastic and bio-based technology, which is applied to engineering plastic moldings with high polylactic acid content and their preparation, and engineering plastic moldings with high impact resistance and high bio-based content and the fields of their preparation, can solve problems such as difficult-to-mold products, etc. To achieve good heat resistance, easy to popularize and apply, easy to operate

Active Publication Date: 2016-08-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modified acrylic resin used in this invention contains styrene and methyl methacrylate structural units, it can improve the compatibility between PC and PLA to a certain extent (there have been researches to prove that these two structural units are respectively compatible with PC It has good compatibility with PLA), but from the point of view of the molded product preparation process it adopts, it is avoiding the crystallization of the PLA phase in the blend material (the mold temperature is -100 ° C), which is obviously difficult High impact, high heat deflection temperature moldings obtained at high PLA content (above 60%)

Method used

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  • Engineering plastic molded product with high impact resistance and high bio-based content and preparation method thereof
  • Engineering plastic molded product with high impact resistance and high bio-based content and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 100 parts of dried polylactic acid, 0.2 parts of compatibilizer a, 6 parts of impact modifier a and 0.6 parts of crystallization nucleating agent a into a high-speed mixer and mix evenly, then add them into a twin-screw extruder to Melt extrusion at 190-230°C for granulation; dry the obtained pellets and put them into an injection molding machine at 210-240°C to form various molded products. The mold temperature is 100°C, and the corresponding molding cycle is 120s.

Embodiment 2

[0043] Add 97 parts of dried polylactic acid, 3 parts of polycarbonate, 0.3 parts of compatibilizer c, 5 parts of impact modifier a and 0.3 parts of crystallization nucleating agent into a high-speed mixer and mix evenly, then add double Melt and extrude pellets in a screw extruder at 190-230°C; dry the obtained pellets and put them into an injection molding machine at 210-240°C for injection molding into various molded products. The mold temperature is 120°C, and the corresponding molding cycle is 90s. .

Embodiment 3

[0045] Add 99.9 parts of dried polylactic acid, 0.1 part of polycarbonate, 0.2 parts of compatibilizer a, 6 parts of impact modifier a and 0.5 parts of crystallization nucleating agent b into a high-speed mixer and mix evenly, then add double Melt and extrude pellets in a screw extruder at 190-230°C; dry the obtained pellets and put them into an injection molding machine at 210-240°C to form various molded products. The mold temperature is room temperature, the molding cycle is 30s, and 100°C Anneal 1h.

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Abstract

The invention discloses a high-impact-resistance high-biomass-content engineering plastic molded piece which contains the following components in parts by weight: 70-100 parts of polylactic acid (PLA) resin, 0-30 parts of polycarbonate resin, 0.2-0.6 part of solubilizer (based on 100 parts of resin), 2-6 parts of impact modifier and 0.2-0.6 part of crystallizing nucleator. The cantilever beam notch impact strength is 37.5-69.2 KJ / m<2>, the tensile strength is 56.4-61.3 MPa, the bending strength is 102.0-108.1 MPa, the bending modulus is 3290-3810 MPa, the heat-deformation temperature under 0.455 MPa is 130-137 DEG C, and the heat-deformation temperature under 1.82 MPa is 66-90 DEG C. The invention also discloses a preparation method of the high-impact-resistance high-biomass-content engineering plastic molded piece. Since the PLA in the molded piece has high crystallinity, even if the PLA content is up to 70-100%, the molded piece has excellent impact resistance, excellent mechanical strength and favorable heat resistance, and is hopeful to abundantly substituting petrochemical high polymers in the fields of general-purpose plastics and engineering plastics, thereby solving the technical problem that the PLA can not be widely substituted for petrochemical high polymers.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials and their preparation, and in particular relates to an engineering plastic molded product with high impact resistance and high bio-based content and a preparation method thereof. More specifically, the present invention relates to an engineering compound with high impact resistance, high heat resistance and high polylactic acid content prepared by using polylactic acid, polycarbonate, compatibilizer, impact modifier and crystallization nucleating agent. Plastic moldings and methods for their preparation. Background technique [0002] As a bio-based and fully biodegradable polymer, polylactic acid not only has excellent mechanical strength and elastic modulus, but also can be formed by a variety of conventional processing methods, such as extrusion, spinning, biaxial stretching, Blow molding, injection molding, etc., together with lactic acid, the raw material for the productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L69/00C08L33/14C08L51/04C08L51/06C08L23/08C08L53/02C08K5/18C08K5/1515C08K3/34C08K5/25
Inventor 王玉忠林玲邓聪林公澎
Owner SICHUAN UNIV