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A kind of high-performance composite material and preparation method thereof

A composite material and high-performance technology, applied in the field of high-performance composite materials and their preparation, can solve the problems of failing to improve the heat resistance of PLA, failing to improve the crystallization rate of PLA, etc. Improve the effect of interfacial interaction force

Active Publication Date: 2020-03-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods only consider the toughening of PLA, but fail to increase the crystallization rate of PLA, that is, they cannot improve the heat resistance of PLA.

Method used

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  • A kind of high-performance composite material and preparation method thereof
  • A kind of high-performance composite material and preparation method thereof
  • A kind of high-performance composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 68 parts of L-polylactic acid (number average molecular weight is 130,000, optical purity is 99.0%) and 32 parts of vinyl acetate-based copolymer / dextrorotary polylactic acid blending masterbatch into internal mixer for 4 minutes ( The blending temperature is 190° C.); the obtained blend is hot-pressed at a temperature of 200° C., and then annealed at 100° C. for 2 minutes to obtain a high-performance composite material.

[0043] The preparation method of described vinyl acetate-based copolymer / dextrorotary polylactic acid blend masterbatch is:

[0044] 20 parts of vinyl acetate-based copolymer (vinyl acetate mass content is 60%, glycidyl methacrylate mass content is 3.1%) and D-polylactic acid (number average molecular weight is 90,000, optical purity is 98.8%) 12 parts were added into an internal mixer for melt blending for 6 minutes (the blending temperature was 230° C.).

Embodiment 2

[0046] Add 60 parts of L-polylactic acid (the number average molecular weight is 150,000, and the optical purity is 98.2%) and 40 parts of vinyl acetate-based copolymer / dextrorotary polylactic acid blending masterbatch into the internal mixer and carry out melt blending for 5 minutes ( The blending temperature is 200°C); the obtained blend is hot-pressed at a temperature of 210°C, and then annealed at 90°C for 2 minutes to obtain a high-performance composite material.

[0047] The preparation method of described vinyl acetate-based copolymer / dextrorotary polylactic acid blend masterbatch is:

[0048] 20 parts of vinyl acetate-based copolymer (vinyl acetate mass content is 50%, glycidyl methacrylate mass content is 5%) and D-polylactic acid (number average molecular weight is 120,000, optical purity is 97.5%) 12 parts were added into the internal mixer for melt blending for 5 minutes (the blending temperature was 220° C.).

Embodiment 3

[0050] Add 72 parts of D-polylactic acid (number-average molecular weight is 120,000, optical purity is 97.5%) and 28 parts of vinyl acetate-based copolymer / L-polylactic acid blending masterbatch into internal mixer and carry out melt blending for 4 minutes ( The blending temperature is 190° C.); the obtained blend is hot-pressed at a temperature of 200° C., and then annealed at 110° C. for 3 minutes to obtain a high-performance composite material.

[0051] The preparation method of described vinyl acetate-based copolymer / L-polylactic acid blend masterbatch is:

[0052] 20 parts of vinyl acetate-based copolymers (the mass content of vinyl acetate is 40%, and the mass content of glycidyl methacrylate is 6%) and 8 parts of L-polylactic acid (the number average molecular weight is 90,000, and the optical purity is 98.8%) The portions were added to an internal mixer and melt blended for 6 minutes (blending temperature was 210°C).

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Abstract

The invention discloses a high-performance composite material and a preparing method thereof, and belongs to the technical field of polymer processing and modifying. The high-performance composite material is prepared from 50-95 parts of polylactic acid A and 5-50 parts of a vinyl acetate copolymer / polylactic acid B blended master batch (the polylactic acid A and the polylactic acid B are opticalisomers). The high-performance composite material has excellent toughness, and also has excellent heat resistance, and can be widely applied to the fields of plastic packaging, automotive upholstery,medical consumables and the like.

Description

technical field [0001] The invention relates to a high-performance composite material and a preparation method thereof, belonging to the technical field of polymer processing and modification. Background technique [0002] Due to the increasingly prominent problems of shortage of petroleum resources and serious environmental pollution, environmentally friendly materials are increasingly favored by people. Polylactic acid (PLA) is a bio-based and biodegradable material, and its synthetic raw materials are derived from plant resources such as corn, which are abundant and renewable. In addition, polylactic acid also has good biocompatibility, processability and mechanical strength, and is an ideal green polymer material. Polylactic acid (PLA) includes L-polylactic acid (PLLA), D-polylactic acid (PDLA) and racemic polylactic acid (PDLLA). PLLA and PDLA have opposite optical activity. When the two are blended, there will be structural complementarity between the molecular chain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L31/04C08L87/00C08G81/02
CPCC08G81/027C08L67/04C08L2201/08C08L31/04C08L87/005
Inventor 马丕明吴保钩曾庆韬东为富钮德宇徐鹏武
Owner JIANGNAN UNIV
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