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Polylactic acid/stem grafting ethylene vinyl acetate (EVA)/imvite nano composite materials and preparation method thereof

A nanocomposite material and composite material technology, which is applied in the field of polylactic acid/grafted EVA/montmorillonite nanocomposite materials and their preparation, can solve the problems such as the inability to obtain exfoliated nanocomposite materials, and achieve excellent comprehensive performance and improved Effect of heat resistance and toughness increase

Inactive Publication Date: 2013-06-19
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the montmorillonite has been modified and the distance between the layers has been improved, the polylactic acid macromolecular chains still cannot be well inserted between the montmorillonite layers, and a good exfoliated nanocomposite cannot be obtained.

Method used

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  • Polylactic acid/stem grafting ethylene vinyl acetate (EVA)/imvite nano composite materials and preparation method thereof
  • Polylactic acid/stem grafting ethylene vinyl acetate (EVA)/imvite nano composite materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] With 10 parts of 0.5% graft rate, the EVA of 10% vinyl acetate content, the modified montmorillonite of 1 part content 1% cetyltrimethylammonium bromide, extrude granulation with twin-screw, extrude The temperature is 150 ℃ ~ 195 ℃, the screw speed is 50 ~ 100rpm to obtain EVA / montmorillonite nanocomposite material; then 100 parts of polylactic acid and EVA / montmorillonite nanocomposite material are mixed evenly, and granulated by twin-screw extrusion. The extrusion temperature is 150°C-195°C, the screw speed is 50-100rpm, and the product is obtained, and its properties are shown in Table 1.

Embodiment 2

[0031] 15 parts of EVA with 0.6% grafting ratio, 20% vinyl acetate content, 2 parts of montmorillonite modified with 3% cetyltrimethylammonium chloride, granulated by twin-screw extrusion, extruded The temperature is 150°C-195°C, the screw speed is 50-100rpm to obtain the EVA / montmorillonite nanocomposite material; then 100 parts of polylactic acid and EVA montmorillonite nanocomposite material are mixed uniformly, extruded with twin-screw to granulate, extruded The outlet temperature is 150°C-195°C, the screw speed is 50-100rpm, and the product is obtained, and its properties are shown in Table 1.

Embodiment 3

[0033] 20 parts of EVA with 0.8% grafting rate, 30% vinyl acetate content, 2 parts of montmorillonite modified with 4% octadecyltrimethylammonium bromide, granulated by twin-screw extrusion, extruded The temperature is 150 ℃ ~ 195 ℃, the screw speed is 50 ~ 100rpm to obtain the modified EVA / montmorillonite nanocomposite material; then 100 parts of polylactic acid and EVA / montmorillonite nanocomposite material are mixed evenly, and produced by twin-screw extrusion pellets, the extrusion temperature is 150°C-195°C, the screw speed is 50-100rpm, and the product is obtained, and its properties are shown in Table 1.

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Abstract

The invention belongs to the technical field of high polymer materials, and relates to polylactic acid / stem grafting ethylene vinyl acetate (EVA) / imvite nano composite materials and a preparation method thereof. The material comprises the components as follows by weight: 100 parts of polylactic acid, 10-50 parts of stem grafting EVA and 1-10 parts of organic modified imvite. According to the polylactic acid / stem grafting EVA / imvite nano composite materials and the preparation method thereof, the imvite is modified, layer distance is enlarged, and the fact that stem grafting EVA is intercalated in the imivite is easy is achieved. The grafting EVA has a strong intercalation capacity, a certain amount of organic modified imvite is enabled to be completely isolated, and isolated type nano composite materials are obtained. The stem grafting EVA is added, and therefore intercalation of the polylactic acid and isolating of the imivite of the polylactic acid / stem grafting EVA / imvite compound can be achieved. The stem grafting EVA is used as bulking agents, and meanwhile can enhance the toughness of polylactic acid composite materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polylactic acid / grafted EVA / montmorillonite nanocomposite material and a preparation method thereof. Background technique [0002] As a biodegradable material, polylactic acid (PLA) can be extracted from renewable resources such as starch and cellulose. It has the advantages of high strength, high modulus, good transparency, low carbon and environmental protection. Polylactic acid can be widely used in packaging, automobiles, agricultural films, medical materials and other fields, and is regarded as the most likely biodegradable material to replace petroleum products. However, the heat resistance, flexibility, and barrier properties of polylactic acid are relatively poor, which greatly limits its application. In order to improve the performance defects of polylactic acid, people usually compound polylactic acid and silicate with a layered structure to obtain polylactic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/06C08K9/04C08K3/34B29C47/92B29C48/92
Inventor 姚寅芳
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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