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Enhanced poly(butylene terephthalate-co-butylene adipate) degraded material

A technology of butanediol terephthalate and butanediol adipate, which is applied in the field of processing and modification of polymer materials, and can solve the problems of multiple components, insufficient strength of biological materials, and complex formulas

Inactive Publication Date: 2017-07-04
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The pre-dried PBAT, PLA, and PDLA were weighed according to a certain proportion, and the total mass was 4kg. The content of PBAT is 60%, the content of PLA and PDLA is 20% each, and 40g of chain extender ethylene-methyl acrylate-glycidyl methacrylate is added, and mixed at high speed for 3 minutes using a high-speed mixer. The uniformly mixed material is fed into a twin-screw extruder, the temperature of each section of the screw is 150-195° C., the screw speed is 150 rpm, extruded and granulated, and a high-strength biodegradable material is prepared.

[0015] The dried pellets are added to the single-screw machine for extrusion blow molding. The temperature of each zone of the single-screw machine is: 160°C for the first zone, 175°C for the second zone, 185°C for the third zone, 185°C for the fourth zone, and 170°C for the head; 150rpm, aspect ratio L / D=24 / 1.

Embodiment 2

[0017] The pre-dried PBAT, PLA, and PDLA were weighed according to a certain proportion, and the total mass was 4kg. The content of PBAT is 70%, and the content of PLA and PDLA is 15%. In addition, 24g of chain extender ethylene-methyl acrylate-glycidyl methacrylate is added, and mixed at high speed for 3 minutes using a high-speed mixer. The homogeneously mixed material is fed into a twin-screw extruder, the temperature of each section of the screw is 160-195° C., the screw speed is 100 rpm, extruded and granulated, and a high-strength biodegradable material is prepared.

[0018] The dried pellets are added to the single-screw machine for extrusion blow molding. The temperature of each zone of the single-screw machine is: 155°C for the first zone, 175°C for the second zone, 195°C for the third zone, 175°C for the fourth zone, and 165°C for the head; 150rpm, aspect ratio L / D=24 / 1.

Embodiment 3

[0020] The pre-dried PBAT, PLA, and PDLA were weighed according to a certain proportion, and the total mass was 4kg. The content of PBAT is 80 parts, and the content of PLA and PDLA is 10 parts respectively. In addition, 8 g of chain extender ethylene-methyl acrylate-glycidyl methacrylate are added, and mixed at high speed for 3 minutes using a high-speed mixer. The uniformly mixed material is fed into a twin-screw extruder, the temperature of each section of the screw is 160-195° C., the screw speed is 150 rpm, extruded and granulated, and a high-strength biodegradable material is prepared.

[0021] The dried pellets are added to the single-screw machine for extrusion blow molding. The temperature of each zone of the single-screw machine is: 155°C for the first zone, 175°C for the second zone, 185°C for the third zone, 180°C for the fourth zone, and 175°C for the head; 150rpm, aspect ratio L / D=24 / 1.

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Abstract

The invention discloses an enhanced poly(butylene terephthalate-co-butylene adipate)degraded material, which belongs to the field of processing modification of a high-molecular material. The method comprises the following steps: pre-dried polybutylene terephthalate-co-butylene adipate, polylactic acid and dextrorotary polylactic acid are mixed according to certain mass ratio, a chain extender is added for being uniformly mixed, a double screw extruder is used for blending extrusion, wherein the temperature for each segment of the screw is 160-195 DEG C, and the screw rotating speed is 100-150 rpm, and extrusion granulation is carried out to obtain the enhanced PBAT fully-biodegraded material. The prepared poly(butylene terephthalate-co-butylene adipate) material has the advantages of high intensity and high toughness, and the method is simple.

Description

technical field [0001] The present invention specifically relates to a method for in-situ formation of stereocomplex crystals by using L-polylactic acid and D-polylactic acid to enhance poly(butylene terephthalate-co-butylene adipate) (PBAT) Method, the invention belongs to the field of polymer material processing modification. Background technique [0002] PBAT is an aromatic-aliphatic copolyester, which has the characteristics of both PBA and PBT. It not only has good ductility and elongation at break, but also has good heat resistance and impact performance. It is a good Biodegradable elastomer; it is easily decomposed and metabolized by various microorganisms in nature or enzymes in animals and plants, and finally forms water and carbon dioxide, which does not pollute the environment. The degradability ensures that PBAT is an environmentally friendly material that can slow down At present, the problem of white pollution caused by plastic products, so the research of PBA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L23/08B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L67/02C08L2201/06C08L2201/08C08L2205/02C08L2205/025C08L2205/035C08L67/04C08L23/0884
Inventor 邹国享屈鑫赵彩霞吴蓉李锦春
Owner CHANGZHOU UNIV
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