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High-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material

A thermoplastic elastomer, maleic anhydride technology, applied in the field of polylactic acid, maleic anhydride grafted thermoplastic elastomer composite material, can solve the problems of high cost, complex modification method and production process, and achieve the effect of good compatibility

Inactive Publication Date: 2017-09-15
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, although there have been many studies on improving the performance of modified polylactic acid, its shortcomings have been overcome by adding polymers that introduce flexible molecular chains, adding plasticizers, and blending with materials with excellent performance, but there are more or less The modification method has problems such as complex production process and high cost

Method used

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  • High-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material
  • High-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material
  • High-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material

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Embodiment 1

[0033] Embodiment 1, a kind of high-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material, its preparation method is as follows:

[0034] (1) Drying of raw materials: drying polylactic acid and maleic anhydride grafted thermoplastic elastomer with a molecular weight of 21700 in an oven at 70° C. for 24 hours, so that the water content by weight is less than 0.01%;

[0035] (2) Melt blending and extrusion: mix the obtained polylactic acid and maleic acid grafted thermoplastic elastomer in a ratio of 85:15, then shake for simple physical mixing, make it fully mixed, and mix at a speed of 250g / min Feed at high speed, melt and extrude through twin-screw extruder at a screw speed of 300 rpm, and at the same time draw at a speed of 300 rpm, and quickly cool and solidify in cooling water below 20°C, and finally extrude The strips are fully cooled in cold water and sent to the pelletizer for pelletizing; during melt blending and extrusio...

Embodiment 2

[0037] Embodiment 2, a kind of high-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material, its preparation method is as follows:

[0038] (1) Drying of raw materials: drying polylactic acid and maleic anhydride grafted thermoplastic elastomer with a molecular weight of 21700 in an oven at 70° C. for 24 hours, so that the water content by weight is less than 0.01%;

[0039](2) Melt blending and extrusion: mix the obtained polylactic acid and maleic acid grafted thermoplastic elastomer in a ratio of 80:20, shake for simple physical mixing, make it fully mixed, and mix at a speed of 200g / min Feed at high speed, melt and extrude through twin-screw extruder at a screw speed of 200 rpm, and at the same time draw at a speed of 200 rpm, and quickly cool and solidify in cooling water below 20°C, and finally extrude The strips are fully cooled in cold water and sent to the pelletizer for pelletizing; during melt blending and extrusion, the...

Embodiment 3

[0041] Embodiment 3, a kind of high-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material, its preparation method is as follows:

[0042] (1) Drying of raw materials: drying polylactic acid and maleic anhydride grafted thermoplastic elastomer with a molecular weight of 21700 in an oven at 70° C. for 24 hours, so that the water content by weight is less than 0.01%;

[0043] (2) Melt blending and extrusion: mix the obtained polylactic acid and maleic acid grafted thermoplastic elastomer in a ratio of 100:0, then shake for simple physical mixing, make it fully mixed, and mix at a speed of 300g / min Feed at high speed, melt and extrude through twin-screw extruder at a screw speed of 400 rpm, and at the same time draw at a speed of 400 rpm, and quickly cool and solidify in cooling water below 20°C, and finally extrude The strips are fully cooled in cold water and sent to the pelletizer for pelletizing; during melt blending and extrusio...

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Abstract

The invention discloses a high-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material. The composite material is prepared from polylactic acid and maleic anhydride grafted thermoplastic elastomer. The preparation method comprises the following steps: respectively drying the polylactic acid and maleic anhydride grafted thermoplastic elastomer; mixing the polylactic acid and maleic anhydride grafted thermoplastic elastomer according to a proportion, shaking for simple physical mixing to enable the polylactic acid and the maleic anhydride grafted thermoplastic elastomer to be sufficiently mixed, and feeding at a high speed; melting and extruding in a twin-screw extruder, and performing high traction rate and quick cooling curing, sufficiently cooling the extruded strips in cold water, and feeding to a granulator for granulating; and drying the granular material, and sufficiently and uniformly dispersing the mixture by adopting high-pressure high-shearing-flow-field injection molding equipment to prepare the high toughness composite material. The composite material has the characteristics of simple preparation process, relatively low energy consumption, low cost, elastomer maleic anhydride grafted thermoplastic elastomer SEBS recycling.

Description

technical field [0001] The invention relates to a polylactic acid and maleic anhydride grafted thermoplastic elastomer composite material, in particular to a high-toughness polylactic acid in-situ maleic anhydride grafted thermoplastic elastomer composite material. Background technique [0002] Environmental pollution and energy depletion have always been the biggest problems plaguing human existence. The bio-based polymer material polylactic acid, which has the advantages of good biocompatibility, biodegradability, mechanical tensile strength and good thermoforming, has been It has become one of the most frequently used plastics in recent years. In the field of biomedicine, it is often used to make surgical sutures, biomimetic materials, tissue engineering scaffold materials, etc. to benefit human beings; in daily production and life, it is used in packaging materials, clothing, home textiles, and automotive interiors. in life. [0003] However, due to its different chemi...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L51/00B29C47/40B29B9/06
CPCC08L67/04B29B9/06B29C48/40C08L2201/06C08L51/006
Inventor 鲁圣军鲁月王彩红黄宏巍何敏
Owner GUIZHOU UNIV
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