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A kind of strong and tough polyester composite material and preparation method thereof

A polyester composite material and polymer technology, applied in the direction of climate sustainability, sustainable manufacturing/processing, bio-packaging, etc., to achieve the effect of simple and easy-to-obtain equipment, increase tensile strength, and improve key common problems

Active Publication Date: 2022-08-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses brand-new process conditions and formula design, adopts the method of pre-stretching and then performing secondary stretching, and carries out high-magnification stretching and heat treatment on polyglycolic acid, which can make polyglycolic acid and the molecular chain of the dispersed phase and The crystals are highly oriented to form special string crystals, which significantly improves the physical and mechanical properties of the material, such as tensile strength, and at the same time slows down the physical aging process of PGA, greatly improving the key common problem of poor durability of PGA

Method used

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  • A kind of strong and tough polyester composite material and preparation method thereof
  • A kind of strong and tough polyester composite material and preparation method thereof
  • A kind of strong and tough polyester composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 80 parts of polyglycolic acid, 20 parts of polyadipate / butylene terephthalate, 0.3 parts of epoxy chain extender ADR437, tetra[β-(3,5-di-tert-butyl-4- 0.3 part of hydroxyphenyl) propionic acid] pentaerythritol ester, 2 parts of talc powder were fully dried and added in the twin-screw extruder in proportion by weight to melt and blend and extrude and granulate to obtain blend A, and the melt-blending temperature was 220 ℃ °C; melt-extrude the dried blend A at 230 °C through a single-screw extruder, lower the melt extrudate to 170 °C and perform pre-stretching with a stretching ratio of 2; The treated extrudate was rapidly cooled to 50°C (25°C above the glass transition temperature of polyglycolic acid) for secondary stretching, and the stretching ratio was 8. Finally, a strong and tough polyester composite material was obtained after heat treatment at 100°C. .

Embodiment 2

[0052] Compared with Example 1, only the second stretching factor is different:

[0053] 80 parts of polyglycolic acid, 20 parts of polyadipate / butylene terephthalate, 0.3 parts of epoxy chain extender ADR437, tetra[β-(3,5-di-tert-butyl-4- 0.3 part of hydroxyphenyl) propionic acid] pentaerythritol ester, 2 parts of talc powder were fully dried and added in the twin-screw extruder in proportion by weight to melt and blend and extrude and granulate to obtain blend A, and the melt-blending temperature was 220 ℃ °C; melt-extrude the dried blend A at 235 °C through a single-screw extruder, directly reduce the melt extrudate to 170 °C and perform pre-stretching with a stretching ratio of 2; The stretched extrudate was rapidly cooled to 50 °C for secondary stretching, and the stretching ratio was 5. Finally, a strong and tough polyester composite material was obtained after heat treatment at 100 °C.

Embodiment 3

[0055] Compared with Example 1, only the second stretching factor is different:

[0056] 80 parts of polyglycolic acid, 20 parts of polyadipate / butylene terephthalate, 0.3 parts of epoxy chain extender ADR437, tetra[β-(3,5-di-tert-butyl-4- 0.3 part of hydroxyphenyl) propionic acid] pentaerythritol ester, 2 parts of talc powder were fully dried and added in the twin-screw extruder in proportion by weight to melt and blend and extrude and granulate to obtain blend A, and the melt-blending temperature was 220 ℃ °C; melt-extrude the dried blend A at 230 °C through a single-screw extruder, directly reduce the melt extrudate to 170 °C and carry out pre-stretching with a stretching ratio of 2; The stretched extrudate was rapidly cooled to 50°C for secondary stretching with a draw ratio of 3, and finally heat-treated at 100°C to obtain a strong and tough polyester composite material.

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Abstract

The invention discloses a strong and tough polyester composite material and a preparation method thereof, belonging to the technical field of polymer processing. The invention is based on the compounding of specific polyglycolic acid and polymer, introducing specific fillers and auxiliary agents, and cooperating with the method of pre-stretching and then secondary stretching. Process parameters such as temperature can achieve high-rate stretching of the polyglycolic acid-based material, and finally heat treatment to make the molecular chains and crystals of the polyglycolic acid and the dispersed phase highly oriented, and obtain a polyglycolic acid composite material with self-reinforcing effect. , while significantly improving the physical and mechanical properties of the material such as tensile strength and elongation at break. The polyglycolic acid composite material prepared by the invention can be formed into strong and tough fibers, monofilaments, flat filaments, films, sheets, pipes, and ribbons, and is widely used.

Description

technical field [0001] The invention relates to a strong and tough polyester composite material and a preparation method thereof, belonging to the technical field of polymer processing. Background technique [0002] Nowadays, plastic products have penetrated into all fields of the national economy, and at the same time, the pressure on the raw materials of plastic products and the environment is becoming more and more serious. The development and utilization of biodegradable plastics is one of the important ways to solve the problem of plastic pollution. Among them, the development of high-performance biodegradable materials to meet long-term and lasting application needs has received more and more attention from domestic and foreign researchers. [0003] Polyglycolic acid is a green biodegradable polyester with good biocompatibility and mechanical properties. In recent years, with the breakthrough of synthesis technology, the cost has dropped significantly, and it is the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02
CPCC08L67/04C08L67/02C08L2205/025Y02W90/10
Inventor 马丕明钮德宇李佳璇徐鹏武杨伟军
Owner JIANGNAN UNIV
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