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Halogen-free flame retardant polylactic acid toughening modification composite material and preparing method thereof

A technology of toughening modified and composite materials, which is applied in the field of halogen-free flame-retardant polylactic acid toughened and modified composite materials and its preparation, which can solve the problems of flammability and poor impact performance, and achieve excellent elongation at break and toughness , the effect of excellent flame retardant performance

Inactive Publication Date: 2016-06-22
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a biodegradable halogen-free flame-retardant polylactic acid toughened and modified composite material for the disadvantages of poor impact performance and flammability of the biodegradable material polylactic acid. As a flame retardant, phosphine / phosphate has low smoke and less toxicity, and is a kind of environmentally friendly phosphorus flame retardant; Polylactic acid is toughened and modified with ester and polycaprolactone, and reactive modifiers are used as compatibilizers to improve the toughness of biodegradable halogen-free flame-retardant polylactic acid modified composites

Method used

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  • Halogen-free flame retardant polylactic acid toughening modification composite material and preparing method thereof
  • Halogen-free flame retardant polylactic acid toughening modification composite material and preparing method thereof
  • Halogen-free flame retardant polylactic acid toughening modification composite material and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] 15.0wt% aluminum hypophosphite, 10.0wt% polycaprolactone, 0.5wt% butyl acrylate-methyl methacrylate-glycidyl methacrylate, 0.5wt% antioxidant tetrakis[β-(3 , 5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (1010) is put into the high-speed mixer and mixed evenly, then after mixing evenly with 74.0wt% polylactic acid resin, add the twin-screw extruder , melt extrusion at 180-210°C, rotate at 100 rpm, and cool to granulate. The LOI of the obtained halogen-free flame-retardant polylactic acid composite material is 28.5, and the vertical combustion rating is V-0. The notched impact strength of flame-retardant polylactic acid toughened and modified composites is 7.0kJ / m 2 , the tensile strength is 45.6MPa, the elongation at break is 32%, the flexural strength is 68.5MPa, and the flexural modulus is 2.4GPa.

Embodiment 2

[0028] 17.0wt% aluminum diethylphosphinate, 10.0wt% polyvinyl alcohol, 2.5wt% epoxidized ethylene propylene rubber, 0.5wt% antioxidant tris(2,4-di-tert-butylphenyl ) ester (168) is put into a high-speed mixer and mixed evenly, then mixed evenly with 70.0wt% polylactic acid resin, then added to a twin-screw extruder, and melted and extruded at 180-210°C at a speed of 50 rpm. And cooling granulation. The LOI of the obtained halogen-free flame-retardant polylactic acid composite material is 29.0, and the vertical combustion rating is V-0. The notched impact strength of flame-retardant polylactic acid toughened modified composite is 8.5kJ / m 2 , the tensile strength is 42.3MPa, the elongation at break is 41%, the flexural strength is 66.3MPa, and the flexural modulus is 2.2GPa.

Embodiment 3

[0030] 12.5wt% aluminum hypophosphite, 15.0wt% polyadipate / butylene terephthalate, 5.0wt% ethylene-acrylate-glycidyl methacrylate terpolymer, 0.5wt% antioxidant 1010 is mixed evenly in a high-speed mixer, then mixed evenly with 67.0wt% polylactic acid resin, then added to a twin-screw extruder at a speed of 50 rpm, melted and extruded at 180-210°C, and cooled to pelletize. The LOI of the obtained halogen-free flame-retardant polylactic acid composite material is 27.5, and the vertical combustion rating is V-0. The notched impact strength of flame-retardant polylactic acid toughened modified composite is 9.6kJ / m 2 , the tensile strength is 41.2MPa, the elongation at break is 50%, the flexural strength is 62.0MPa, and the flexural modulus is 2.1GPa.

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Abstract

The invention discloses a halogen-free flame retardant polylactic acid toughening modification composite material.The composite material is mainly composed of 50.0-80 wt% of polylactic acid, 5.0-20.0 wt% of biodegradable plastic, 10.0-20.0 wt% of phosphorus based flame retardant, 0.5-20.0 wt% of reactive compatibilizer and 0.2-1.0 wt% of antioxidant.Hypophosphite and phosphonate with different ratios are taken as the flame retardant to achieve flame retarding of polylactic acid, polylactic acid is toughened through a bio-based elastomer, a reactive polymer is added to serve as the reactive compatibilizer, and the halogen-free flame retardant biodegradable polylactic acid toughening modification composite material is prepared through melting reaction and blending.The composite material has excellent flame retarding property, elongation at break and toughness.The biodegradable halogen-free flame retardant polylactic acid toughening modification composite material is efficient and low in toxicity and is an environment-friendly biodegradable flame retardant plastic.The composite material has excellent flame retarding property and mechanical property and can be used in the fields such as packaging, film, textile and automobiles.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an environment-friendly halogen-free flame-retardant polylactic acid toughened and modified composite material and a preparation method thereof. Background technique [0002] Due to the excellent properties of polymer materials such as low cost, light weight and large-scale mass production, they are widely used in various industries and daily life. However, the "white pollution" produced by the extensive use of petroleum-based polymer materials has become a threat to society. The worldwide pollution of the environment has seriously hindered the sustainable development of the social economy and the environment. Bio-based degradable polymer materials can solve the difficult recycling problem of petroleum-based polymers. In recent years, countries around the world have been competing to develop biodegradable materials, and the global bioplastics market has gro...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L33/08C08L23/08C08L23/26C08L51/04C08K3/32C08K5/5313
CPCC08L67/04C08L2201/22C08L2201/02C08L2201/06C08L2205/025C08L2205/03C08L33/08C08K3/32C08L29/04C08L23/26C08K5/5313C08L67/02C08L23/0869C08L51/04C08L51/003
Inventor 吴宁晶杜吉玉杜宁付国良
Owner QINGDAO UNIV OF SCI & TECH
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