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A polylactic acid alloy material with high plant density and high performance

A technology of alloy materials and polylactic acid, which is applied in the field of polymer technology and ecological environment materials, can solve the problem of size reduction of dispersed phase micro-domains, and achieve the effects of size reduction, high plant density, and reduced interfacial tension

Active Publication Date: 2015-08-19
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to make use of the performance complementarity of polylactic acid and polycarbonate, by adding a high-efficiency compatibilizer to the blend for melt blending, so that the originally poorly compatible polylactic acid The compatibility with polycarbonate blends is well improved, the size of the dispersed phase domains is significantly reduced, and even a bicontinuous phase structure with excellent structure is achieved, thereby overcoming the brittleness and poor heat resistance of polylactic acid, At the same time, it can maintain a high content of polylactic acid in the alloy

Method used

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  • A polylactic acid alloy material with high plant density and high performance
  • A polylactic acid alloy material with high plant density and high performance
  • A polylactic acid alloy material with high plant density and high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] After drying polylactic acid, polycarbonate and high-efficiency comb-type compatibilizer in a vacuum oven at 80°C, 100°C, and 50°C for 24 hours, 30g of polylactic acid, 70g of polycarbonate, and 5g of high-efficiency comb-type compatibilizer, After mixing and stirring at room temperature, add it to the internal mixer at one time. The temperature of the internal mixer is 240 ° C, the screw speed is set at 50 rpm, and the melt blending is performed for 5 minutes to obtain a high-vegetative high-performance polylactic acid alloy material.

[0039] The polylactic acid alloy material prepared in Example 1 was hot-pressed into sheets in a hot press at 240°C, and a standard test sample was prepared with a standard dumbbell-shaped punching knife for performance testing. The results are shown in Table 1.

Embodiment 2

[0041] After drying polylactic acid, polycarbonate and high-efficiency comb-type compatibilizer in a vacuum oven at 80°C, 100°C, and 50°C for 24 hours, 50g of polylactic acid, 50g of polycarbonate, and 5g of high-efficiency comb-type compatibilizer, After mixing and stirring at room temperature, add it to the internal mixer at one time. The temperature of the internal mixer is 240 ° C, the screw speed is set at 50 rpm, and the melt blending is performed for 5 minutes to obtain a high-vegetative high-performance polylactic acid alloy material.

[0042] The polylactic acid alloy material prepared in Example 2 was hot-pressed into sheets in a hot press at 240°C, and a standard test sample was prepared with a standard dumbbell-shaped punching knife for performance testing. The results are shown in Table 1.

Embodiment 3

[0044] After drying polylactic acid, polycarbonate and high-efficiency linear compatibilizer in a vacuum oven at 80°C, 100°C, and 50°C for 24 hours, 50g of polylactic acid, 50g of polycarbonate, and 5g of high-efficiency linear compatibilizer were mixed at room temperature After mixing and stirring, add it to the internal mixer at one time. The temperature of the internal mixer is 240 ° C, the screw speed is set at 50 rpm, and the melt blending is performed for 5 minutes to obtain a high-vegetative high-performance polylactic acid alloy material.

[0045] The polylactic acid alloy material prepared in Example 3 was hot-pressed into sheets in a hot press at 240°C, and a standard test sample was prepared with a standard dumbbell-shaped punching knife for performance testing. The results are shown in Table 1.

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Abstract

The invention discloses a high-plant high-performance polylactic acid alloy material. The high-plant high-performance polylactic acid alloy material is used for solving the problem that the existing polylactic acid composite materials can not reach the unification between excellent mechanical properties and high polylactic acid content. The material disclosed by the invention is a mixture, wherein the mixture comprises polylactic acid, polycarbonate, an efficient compatibilizer and additives. The high-plant high-performance polylactic acid alloy material has the advantages that the polylactic acid content of the alloy material is high, so that the petrochemical resource dependence of alloy preparation is low, and the material is environmental-friendly; the impact resistance and heat resistance of the prepared polylactic acid alloy material are improved greatly, and the alloy material has high modulus and high strength; and only common melt mixing equipment is required to be used during preparation, and the industrial preparation is simple.

Description

technical field [0001] The invention belongs to the field of polymer technology and ecological environment materials, in particular to a polylactic acid alloy material with high plant density, high impact performance and good heat resistance. Background technique [0002] Resources and the environment are one of the major issues facing human beings. Traditional polymer materials are derived from non-renewable petrochemical resources. Before the depletion of non-renewable petroleum resources, renewable polymer materials, especially those derived from biomass, have attracted global attention. In the past 10 years, polylactic acid materials have received widespread interest from the industry. The reasons include: 1) The raw materials for polylactic acid production are derived from plants and do not depend on petroleum. Before the depletion of non-renewable petroleum resources, renewable products must Will become a worldwide commodity. 2) Polylactic acid can be biodegraded und...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L69/00C08L33/12
Inventor 李勇进赵蒙蒙
Owner HANGZHOU NORMAL UNIVERSITY
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