Polybutylene adipate-co-terephthalate compound materials and preparation method thereof

A technology of butylene terephthalate and polyadipic acid, which is applied in the field of preparation of polymer composite materials, can solve the problem of large phase domains of blended materials, expensive block copolymers, and the decline in comprehensive performance and pure polymers and other issues to achieve the effect of improving strength and modulus

Active Publication Date: 2014-12-24
江苏信隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the thermodynamic incompatibility between polyester and polylactic acid makes their blended materials have larger phase domains and loose interfacial bonding, and the performance cannot meet the expected expectations, and even the overall performance may decrease compared with pure polymers. Therefore, it is necessary to carry out compatibilization modification on the blend system
The traditional method is to use a block copolymer with a similar chemical structure to polyester and polylactic acid as the third component for compatibilization, but the price of the block copolymer is too expensive, which greatly increases the manufacturing cost of the blended material

Method used

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  • Polybutylene adipate-co-terephthalate compound materials and preparation method thereof
  • Polybutylene adipate-co-terephthalate compound materials and preparation method thereof
  • Polybutylene adipate-co-terephthalate compound materials and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1. Mix the dried polybutylene adipate-terephthalate and polylactic acid at a mass ratio of 70:30 and place them in a Haake torque rheometer, and control the rotor shear rate to 50 at a temperature of 180°C. the s -1 ~100s -1 , melt blended for 2 min, then added 15% of the total mass of glass fibers and blended for 6 min before discharging.

[0021] 2. Use a micro-injection molding machine to inject the output into standard dumbbell-shaped (32 mm×4 mm×2 mm) and standard rectangular (80 mm×10 mm×4 mm) specimens for testing tensile and impact properties. The injection process is as follows: barrel temperature 180°C, mold temperature 30°C, injection pressure 600 bar, holding pressure 500 bar.

Embodiment 2

[0023] 1. Mix the dried polybutylene adipate-terephthalate and polylactic acid at a mass ratio of 70:30 and place them in a Haake torque rheometer, and control the rotor shear rate to 50 at a temperature of 180°C. the s -1 ~100s -1 , melt blended for 2 min, then added glass fibers accounting for 20% of the total mass and blended for 6 min before discharging.

[0024] 2. Use a micro-injection molding machine to inject the output into standard dumbbell-shaped (32 mm×4 mm×2 mm) and standard rectangular (80 mm×10 mm×4 mm) specimens for testing tensile and impact properties. The injection process is as follows: barrel temperature 180°C, mold temperature 30°C, injection pressure 600 bar, holding pressure 500 bar.

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Abstract

The invention provides polybutylene adipate-co-terephthalate compound materials and a preparation method thereof and relates to the technical field of preparation of compound materials. Dry polybutylene adipate-co-terephthalate and polylactic acid are arranged in a torque rheometer, melt blending is performed under the conditions that the temperature is 180 DEG C and the rotor shearing rate is 50 <minus 1> to 100 <minus 1> s, glass fibers are added to perform melt blending, and the plastic injection forming is performed. Polylactic acid dispersed phases in prepared biodegradable compound materials are connected with overlap joint points of the glass fibers in a welding mode and accordingly the glass fibers form into a firm network structure in a polybutylene adipate-co-terephthalate substrate. According to the polybutylene adipate-co-terephthalate compound materials and the preparation method thereof, the glass fibers form into the perfect network structure in the polybutylene adipate-co-terephthalate substrate and accordingly the enhancement effect of the glass fibers is maximized and the strength and the modulus of the polybutylene adipate-co-terephthalate are greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of polymer composite materials, in particular to the technical field of preparation of polymer composite materials of biodegradable polymer incompatible blends. Background technique [0002] With the requirements of environmental protection and economic development, biodegradable polymers such as polybutylene adipate-terephthalate and polylactic acid have attracted increasing attention as new degradable polymer materials. They have good thermoplasticity, biocompatibility, biodegradability and tissue absorbability, so not only in the field of general plastics, but also in biomedical engineering such as drug controlled release substrates, porous tissue engineering scaffolds, packaging, etc. It also has potential application value. [0003] However, a single polybutylene adipate-terephthalate or polylactic acid has its own shortcomings in performance. For example, the glass transition temperatur...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08K7/14
Inventor 吴德峰丁昆山王艺刘海云吕巧莲
Owner 江苏信隆新材料有限公司
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