High-tenacity PLA/PBAT blending alloy and preparation method thereof

A PDLA-PBAT-PDLA, mixed gold technology, applied in the direction of flexible coverings, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of complex formula, multiple components, and insufficient strength of biological materials, and achieve Wide range of sources, enhanced interfacial adhesion, excellent biocompatibility and biodegradability effects

Active Publication Date: 2019-08-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the compatibility problem of the two materials themselves, the strength of the biomaterial is not ideal
The Chinese patent (CN103254597) is compounded by PLA, PBAT and ethylene-vinyl acetate copolymer (EVA). At the same time, polycaprolactone (PCL), EVA and PLA graft copolymer and vegetable oil polyol improve the stability of the system. The capacitive problem is well solved, the prepared material has good tensile strength and toughness, and is easy to process, but the system has many components and complex formula

Method used

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  • High-tenacity PLA/PBAT blending alloy and preparation method thereof
  • High-tenacity PLA/PBAT blending alloy and preparation method thereof
  • High-tenacity PLA/PBAT blending alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-toughness PLA / PBAT blended alloy, the ratio of raw materials and components is as follows:

[0036] PLA mass fraction: 84g.

[0037] PBAT mass fraction: 15g.

[0038] PDLA-PBAT-PDLA triblock copolymer mass fraction: 1g.

[0039] A high-toughness PLA / PBAT blended alloy, the preparation process is as follows:

[0040] Place PLA, PBAT, and the PDLA-PBAT-PDLA triblock polymer synthesized in Step 2 in a vacuum drying oven at 70°C for 2 hours. Add the dried PLA, PBAT, and the PDLA-PBAT-PDLA tri-block polymer synthesized in step 2 into the internal mixer, melt and mix in the internal mixer for 5 minutes, the rotor speed is 100 rpm, and the heating temperature of the internal mixer is At 180°C, a PLA / PBAT blended alloy was obtained.

Embodiment 2

[0042] A high-toughness PLA / PBAT blended alloy, the ratio of raw materials and components is as follows:

[0043] PLA: 80g. ;

[0044] PBAT: 17g.

[0045]PDLA-PBAT-PDLA triblock copolymer: 3g.

[0046] A kind of high toughness PLA / PBAT blend alloy, the preparation of PLA / PBAT blend alloy:

[0047] PLA, PBAT, and PDLA-PBAT-PDLA triblock polymers were dried in a vacuum oven at 70°C for 2 hours. Add the dried PLA, PBAT, and the PDLA-PBAT-PDLA tri-block polymer synthesized in step 2 into the internal mixer, melt and mix in the internal mixer for 5 minutes, the rotor speed is 100 rpm, and the heating temperature of the internal mixer is At 180°C, a PLA / PBAT blended alloy was obtained.

Embodiment 3

[0049] A high-toughness PLA / PBAT blended alloy, the ratio of raw materials and components is as follows:

[0050] PLA mass fraction: 75g.

[0051] PBAT mass fraction: 20g.

[0052] PDLA-PBAT-PDLA triblock copolymer mass fraction: 5g.

[0053] A kind of high toughness PLA / PBAT blend alloy, the preparation of PLA / PBAT blend alloy:

[0054] PLA, PBAT, and PDLA-PBAT-PDLA triblock polymers were dried in a vacuum oven at 70°C for 2 hours. Add the dried PLA, PBAT, and the PDLA-PBAT-PDLA triblock polymer synthesized in step 2 into the internal mixer, melt and mix in the internal mixer for 5 minutes, the rotor speed is 100r / min, and the heating temperature of the internal mixer is 180 °C, the PLA / PBAT blended alloy was obtained.

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Abstract

The invention relates to the field of the high polymer material blending alloy, and specifically relates to a high-tenacity polylactic acid PLA/PBAT blending alloy and a preparation method thereof. The PLA, the PBAT, the PDLA-PBAT-PLDA triblock copolymer are used as the raw material, and a banburying machine is used for preparing the PLA//PBAT/PDLA-PBAT-PDLA blending alloy, the content of the PDLA-PBAT-PLDA triblock copolymer in a blending system is 1%-10%. The PLA/PBAT blending alloy prepared by the invention takes the PDLA-PBAT-PDLA triblock copolymer as the compatilizer, the PDLA chain segment can form the steric composite crystal (SC) in-situ with the PLA when performing the melt blending, the PLA and PBAT two-phase interfacial force is improved, and the mechanical performance of the alloy is obviously improved. The blending alloy disclosed by the invention is simple in process, normal in equipment and easy to realize industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-toughness PLA / PBAT blend alloy and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a kind of aliphatic polyester obtained by chemical synthesis from crop fruits or crop stalks, which is extracted and fermented to obtain lactic acid monomers. It has good biocompatibility and can be used in nature. The final products of degradation are water and carbon dioxide, which will not pollute the environment. At the same time, it has high tensile strength (>60MPa), easy to process and shape, and the price is cheaper than PBAT. [0003] PBAT is an aromatic-aliphatic copolyester, which has the characteristics of both PBA and PBT. It has good ductility and elongation at break, and is a good biodegradable elastomer; it is easily destroyed by nature. The enzyme catabolism in a variety of microorganisms or animals and plants w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02B65D65/46
CPCB65D65/466C08L67/04C08L2201/06C08L2205/025C08L2205/03C08L2205/08C08L67/02Y02W90/10
Inventor 李锦春袁洁余苗苗范期程邹国享赵彩霞
Owner CHANGZHOU UNIV
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