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Transparent polylactic acid alloy material

An alloy material and polylactic acid technology, applied in the field of transparent polylactic acid alloy material and its preparation, can solve the problems of damage to the transparent performance of polylactic acid, failure to achieve, etc., and achieve the effects of excellent light transmission performance, short molding cycle, and simple industrial preparation.

Inactive Publication Date: 2013-01-30
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all of these literatures fail to achieve the goal of a single modification that can both toughen and increase the crystallization rate.
Most importantly, none of the current toughening research and nucleating agent research has damaged the transparency of polylactic acid.

Method used

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  • Transparent polylactic acid alloy material
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  • Transparent polylactic acid alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The elastomer used is ethylene-acrylate-glycidyl methacrylate copolymer, the weight fractions of ethylene, acrylate, and glycidyl methacrylate are 68%, 22% and 10%, and the epoxy value is 0.07 equivalent / 100g , The melt index is 6g / 10min. The sample was purchased from the French company Arkema, the brand name is AX8900. After drying polylactic acid (PLA) and elastomer in a vacuum oven at 80°C for 24 hours, according to the mass ratio of PLA and elastomer at a ratio of 80:20, mix and stir at room temperature, add to the internal mixer, and banbury The machine temperature is 200°C, the screw speed is set at 100rpm, and the mixing time is 15min.

[0034] The above mixed samples were hot-pressed into sheets in a hot press at 210°C, and standard test specimens were prepared with standard dumbbell-shaped punching knives for performance testing. The results are shown in Table 1.

Embodiment 2

[0036] The elastomer is ethylene-glycidyl methacrylate copolymer, the mass fractions of ethylene and glycidyl methacrylate are 92% and 8%, and the epoxy value is 0.056 equivalent / 100g. The melt index was 5 g / min. The sample was purchased from the French company Arkema, the brand name is AX8840. After drying polylactic acid (PLA) and elastomer in a vacuum oven at 80°C for 24 hours, according to the mass ratio of PLA and elastomer at a ratio of 80:20, mix and stir at room temperature, add to the internal mixer, and banbury The machine temperature is 200°C, the screw speed is set at 100rpm, and the mixing time is 15min.

[0037] The above mixed samples were hot-pressed into sheets in a hot press at 210°C, and standard test specimens were prepared with standard dumbbell-shaped punching knives for performance testing. The results are shown in Table 1.

Embodiment 3- Embodiment 5

[0039] The elastomer is the same as in Example 1, and other operations are the same as in Example 1. The difference is that the mass ratios of polylactic acid and elastomer are respectively 85:15, 90:10, and 95:5, and are prepared by the same operation method as in Example 1. The mixed samples were obtained, and the test results are shown in Table 1.

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Abstract

The invention discloses a transparent polylactic acid alloy material, which is prepared by polylactic acid and an elastomer by a melt mixing device through melt blending, based on the polylactic acid and the elastomer, the mass fraction of the polylactic acid accounts for 75-98% and the mass fraction of the elastomer accounts for 2-25%, and the elastomer is the elastomer containing maleic anhydride or an epoxy group. According to the invention, a certain amount of elastomer capable of being reacted with polylactic acid is added in the polylactic acid, the melt blending condition of the material is adjusted in a reasonable mode, all elastomer micro-areas are uniformly dispersed in the polylactic acid, and the disperse size is less than 100nm, thereby the transparent polylactic acid alloy material with substantially enhanced material shock resistance and fast crystallization speed of matrix polylactic acid can be obtained. A purpose that primary modification overcomes a plurality of polylactic acid application barriers can be realized. The transparent polylactic acid alloy material can be used in the industries of package, electron, building material, automobile and the like.

Description

technical field [0001] The invention relates to the fields of polymer technology and ecological environment materials, in particular to a transparent polylactic acid alloy material with high impact performance, good ductility and fast crystallization speed and a preparation method thereof. Background technique [0002] Resources and the environment are major and important 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: First, 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 worldwid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/08C08L51/06C08L51/00
Inventor 李勇进
Owner HANGZHOU NORMAL UNIVERSITY
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