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Biodegradable polyester PBAT composite material and preparation method thereof

A technology for degrading polyester and composite materials. It is applied in the field of polymer composite materials. It can solve problems such as insufficient injection, low pass rate, and unsuitable PBAT, and achieve high flexibility and mechanical properties, good fluidity, and expand the application range.

Inactive Publication Date: 2021-05-14
CHENGDU TIANXING PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the limitations of PBAT's own characteristics, such as PBAT's low MI value and high intrinsic viscosity, PBAT has not been suitable for direct use in injection molding processes.
For large-area PBAT injection molding products, especially large-area thin-wall flexible products, it is easy to cause under-injection, sticking, etc., resulting in low pass rate and low production efficiency.
Therefore, PBAT is currently mainly used for the development and production of various film bag products, and it is difficult to be directly used for large-scale large-scale injection molding production

Method used

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  • Biodegradable polyester PBAT composite material and preparation method thereof
  • Biodegradable polyester PBAT composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The preparation of embodiment 1PBAT improved material

[0022] Weigh PBAT and hydroquinone in proportion by weight (the weight ratio of PBAT and hydroquinone is 93:7), dry in a vacuum oven at 90°C for 4 hours, remove moisture, mix well and pour into a torque rheometer For blending, set the blending temperature to 170°C and the rotation speed to 50r / min, take it out after blending for 6 minutes, and cool at room temperature to obtain a blend, which is the PBAT modified material.

Embodiment 2

[0023] The preparation of embodiment 2PBAT improved material

[0024] Weigh PBAT and hydroquinone in proportion by weight (the weight ratio of PBAT and hydroquinone is 96:4), dry in a vacuum oven at 90°C for 4 hours, remove moisture, mix well and pour into a torque rheometer For blending, set the blending temperature to 170°C and the rotation speed to 50r / min, take it out after blending for 6 minutes, and cool at room temperature to obtain a blend, which is the PBAT modified material.

Embodiment 3

[0025] The preparation of embodiment 3PBAT improved material

[0026] Weigh PBAT and hydroquinone in proportion by weight (the weight ratio of PBAT and hydroquinone is 99:1), dry in a vacuum oven at 90°C for 4 hours, remove moisture, mix well and pour into a torque rheometer For blending, set the blending temperature to 170°C and the rotation speed to 50r / min, take it out after blending for 6 minutes, and cool at room temperature to obtain a blend, which is the PBAT modified material.

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PUM

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Abstract

The invention discloses a biodegradable polyester PBAT composite material, and relates to the field of polymer composite materials. The composite material comprises the following components in parts by weight: 75-99 parts of a PBAT improved material and 1-20 parts of an organic additive. According to the biodegradable polyester PBAT composite material, phenolic hydroxyl groups in hydroquinone and ester groups in PBAT act to form hydrogen bonds, the prepared PBAT modified material and the organic additive are subjected to blow molding mixing, and the prepared PBAT composite material has the advantage of being good in fluidity, so that the PBAT composite material has high flexibility and mechanical performance, and rapid and large-scale production of the PBAT composite material is realized, the PBAT composite material is not limited to film bag products any more, and the application range of the PBAT composite material is further expanded.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a biodegradable polyester PBAT composite material and a preparation method thereof. Background technique [0002] The full name of PBAT is poly(butylene adipate-co-terephthalate), which is the abbreviation of English Poly(butyleneadipate-co-terephthalate), and its chemical structure formula is: [0003] [0004] It can be seen from its chemical structural formula that PBAT is a copolymer of butylene adipate (BT) and butylene terephthalate (BT). Combining the characteristics of PBA (polybutylene adipate) and PBT (polybutylene terephthalate), it has good mechanical properties, high ductility and elongation at break. It also has excellent biodegradability and is a fully biodegradable material, which is widely used in agriculture, packaging and medical fields. [0005] Due to the characteristics of PBAT itself, such as the low MI value of PBAT, the limitation of the in...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L3/02C08L67/04C08G63/91
CPCC08L67/02C08G63/916C08L2201/06C08L2205/02C08L2205/03C08L3/02C08L67/04
Inventor 陶永华
Owner CHENGDU TIANXING PRINTING
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