Polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid composite materials and its preparation, can solve the problems of low calcium carbonate filling, strong interface adhesion, etc., and achieve the effects of increasing filling, low cost and simple preparation method

Active Publication Date: 2014-02-12
苏州梅克兰循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the publication number CN101638509A discloses a technology of physically blending ester polymers with calcium carbonate, and then blending with polylactic acid to prepare toughened calcium carbonate-filled polylactic acid. However, ester polymers and carbonic acid Simple blending between calcium is difficult to produce strong interfacial adhesion, and the filling amount of calcium carbonate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 30 parts of butylene adipate-butylene terephthalate copolymer (PBAT, product of Hangzhou Xinfu Pharmaceutical Co., Ltd.) and calcium carbonate (2500 mesh, product of Zhejiang Ningbo Jiufeng Mining Co., Ltd.) 110 parts were blended in a rotor internal mixer for 2 minutes, and then 3.0 parts of methacrylic acid and 0.6 parts of dicumyl peroxide were added respectively, and mixing was continued for 5 minutes to obtain a blend. The rotor speed was 40 rpm and the temperature was 120°C.

[0025] 120 parts of PLA (4032D, a product of Natureworks LLC) and the above mixture were melt blended in a rotor internal mixer for 5 minutes to obtain a polylactic acid composite material, the rotor speed was 40 rpm and the temperature was 170°C. The polylactic acid composite material was pressed into sheets with a thickness of 1mm and 4mm using a flat vulcanizer for tensile and impact experiments. The tensile strength of the polylactic acid composite sheet is 25MPa, the elongation at break is...

Embodiment 2

[0027] Combine 28 parts of 3-hydroxybutyrate-4 hydroxybutyrate copolymer (the molar content of 4-hydroxybutyrate is 10%, the product of Shenzhen Ekman Technology Co., Ltd.) and talc powder (1250 mesh, Jiangxi Aote Fine Mine Powder Co., Ltd. product) 100 parts, 2.5 parts of acrylic acid and 0.5 parts of dicumyl peroxide were blended in a rotor internal mixer for 6 minutes to obtain a blend. The rotor speed was 50 rpm and the temperature was 135°C.

[0028] Melt blending 100 parts of PLA (4032D, a product of Natureworks LLC) with the above mixture in a rotor internal mixer for 5 minutes to obtain a polylactic acid composite material. The rotor speed is 40 rpm and the temperature is 170°C. The polylactic acid composite material was pressed into sheets with a thickness of 1mm and 4mm using a flat vulcanizer for tensile and impact experiments. The tensile strength of the polylactic acid composite sheet is 28MPa, the elongation at break is 55%, and the notched impact strength is 4.8kJ / ...

Embodiment 3

[0030] Combine 30 parts of ethylene-vinyl acetate copolymer (50% by mass of vinyl acetate, product of LANXESS, Germany) and 165 parts of calcium carbonate (60-80 nm, product of Shiraishi, Japan) in a rotor internal mixer. Mix for 2 minutes, then add 5.2 parts of methacrylic acid and 1.0 part of dicumyl peroxide, and continue mixing for 5 minutes to obtain a blend. The rotor speed is 40 rpm and the temperature is 100°C.

[0031] Melt blending 100 parts of PLA (4032D, a product of Natureworks LLC) with the above mixture in a rotor internal mixer for 5 minutes to obtain a polylactic acid composite material. The rotor speed is 40 rpm and the temperature is 170°C. The polylactic acid composite material was pressed into sheets with a thickness of 1mm and 4mm using a flat vulcanizer for tensile and impact experiments. The measured tensile strength of the polylactic acid composite sheet is 32MPa, the elongation at break is 65%, and the notched impact strength is 7.3kJ / m 2 .

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Abstract

The invention discloses a polylactic acid composite material and a preparation method thereof. The polylactic acid composite material comprises the following active ingredients respectively in parts by weight: 80-120 parts of polylactic acid, 100-200 parts of inorganic fillers, 15-35 parts of ester copolymer, 0.5-10 parts of polyfunctional group coupling agent, and 0.02-2 parts of radical initiator. According to the preparation method provided by the invention, the filling capacity and dispersity of the inorganic fillers, as well as the interface binding force between the inorganic fillers and the polymer, in the polylactic acid composite material can be remarkably improved. The composite material has the advantages of being excellent in properties, low in cost, biodegradable and the like, and the preparation method is simple, and easy for realization of industrial production.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polylactic acid composite material and a preparation method thereof. Background technique [0002] The extensive use and abandonment of traditional polymer materials has not only caused an increasing shortage of petroleum resources, but also caused serious damage to the ecological environment. Vigorously developing bio-based and biodegradable materials, and gradually replacing the commonly used traditional polymer materials is an effective way to solve the above problems. Polylactic acid (PLA) is considered to be one of the most promising and competitive materials in the bioplastics family. It is derived from biomass and can be completely degraded into CO under composting conditions. 2 And H 2 O, will not cause pollution to the environment. [0003] Polylactic acid, including poly-L-lactic acid (PLLA), poly-dextro-lactic acid (PDLA), and L-lactic acid-dextro-lactic acid cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/08C08L51/06C08F283/02C08F263/04C08K9/10B29B7/74
Inventor 马丕明袁龙陈明清东为富许允生施冬健
Owner 苏州梅克兰循环科技有限公司
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