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Toughening polythene-polylactic acid composition

A polyethylene and polylactic acid technology, applied in the field of thermoplastic compositions, can solve the problems of high requirements on mechanical equipment, difficult industrialization, complicated operation, etc., and achieve the effects of low cost, high ductility and simple process

Inactive Publication Date: 2009-04-08
江苏英纳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages of complex operation, high requirements for mechanical equipment, and difficult industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] According to the formula of 65 grams of polylactic acid resin, 15 grams of polyethylene, and 20 grams of polymer impact modifier, melt and mix in an internal mixer for 5 minutes, and the mixing processing temperature is 165 ° C. Press the mixed material in a hydraulic press Formed into 4mm thick sheet, pressing temperature 175°C; the toughened polylactic acid obtained by pressing was tested for mechanical properties. The results obtained: tensile strength 45MPa, elongation at break 320%, notched impact strength 71kJ / m 2 , flexural modulus 2206MPa, flexural strength 56MPa.

Embodiment 2

[0044] According to the formula of 60 grams of polylactic acid resin, 20 grams of polyethylene, and 20 grams of polymer impact modifier, melt and mix in an internal mixer for 5 minutes, and the mixing processing temperature is 165 ° C. Press the mixed material in a hydraulic press Formed into 4mm thick sheet, pressing temperature 175°C; the toughened polylactic acid obtained by pressing was tested for mechanical properties. The results obtained: tensile strength 41MPa, elongation at break 268%, notched impact strength 69kJ / m 2 , flexural modulus 2116MPa, flexural strength 54MPa.

Embodiment 3

[0046] According to the formula of 50 grams of polylactic acid resin, 25 grams of polyethylene, and 25 grams of polymer impact modifier, melt and mix in an internal mixer for 5 minutes, and the mixing processing temperature is 165 ° C. Press the mixed material in a hydraulic press Formed into 4mm thick sheet, pressing temperature 175°C; the toughened polylactic acid obtained by pressing was tested for mechanical properties. The results obtained: tensile strength 39MPa, elongation at break 260%, notched impact strength 72kJ / m 2 , flexural modulus 2012MPa, flexural strength 52MPa.

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Abstract

The invention relates to a toughening polyethylene-polylactic resin combination which comprises polyethylene, polylactic resin and an impact modifier. The impact modifier comprises a copolymer impact modifier composed of monomers (a), (b) and (c), wherein, the (a) is ethylene and the (b) is a kind or many kinds of alkene with a general formula CH2=CR<1>, wherein, the R<1> is an alkyl which comprises 3 to 9 carbon atoms like propyl, butyl or amyl; the (c) is a type or many types of alkene with a general formula CH2=C(R<2>)CO2R<3>, wherein, R<2> is hydrogen or an alkyl which comprises 1 to 5 carbon atoms like methyl and R<3> is glycidyl. The combination is characterized by favorable impact resistance and tractility, higher rigidity and being environmentally-friendly.

Description

technical field [0001] The invention relates to a toughened polyethylene and polylactic acid composition. More specifically, the present invention relates to thermoplastic compositions comprising polyethylene and polylactic acid toughened with a glycidyl-containing copolymer impact modifier. Background technique [0002] Polylactic acid is a completely biodegradable polymer material, which is finally degraded into inorganic substances such as water and carbon dioxide in the natural environment through the action of enzymes produced by microorganisms. Among the degradable thermoplastic polyester polymer materials, polylactic acid has the highest melting point, the highest glass transition temperature and mechanical strength, so it has better heat resistance. In particular, since polylactic acid is a renewable resource produced from cornstarch, it is an environmentally friendly material, so polylactic acid has become used in automotive parts and electronic industrial products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/04C08L23/08C08L51/06B29B7/82
Inventor 吴驰飞苏志忠刘勇军曹德明郭卫红许海燕李秋影
Owner 江苏英纳新材料有限公司
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