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Polylactic acid toughening modification plastic and preparation method thereof

A technology of toughening and modifying polylactic acid, which is applied in the field of plastics, can solve the problems of low tensile strength and low bending strength of plastic particles, and achieve the effect of simple preparation method, simple raw materials and easy availability of raw materials

Inactive Publication Date: 2015-12-23
SUZHOU POLYMER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a polylactic acid toughened modified plastic with high tensile strength, high bending strength, high impact strength and high elongation at break and a preparation method thereof, which solves the problem of low tensile strength and low bending strength of existing plastic particles. technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Weigh 100 parts of PLA, 10 parts of PBAT, 0.5 parts of PEG, 1 part of calcium stearate, 0.5 parts of stearic acid, 15 parts of ACR, 20 parts of PBT, 20 parts of PC and 40 parts of propylene oxide according to the ratio of parts by mass. Parts, tributyl citrate is 13 parts.

[0023] Step 2: Put PBAT and PC into the reactor and mix for 35 minutes, add PLA, PEG, calcium stearate and ACR, raise the temperature to 90°C, and mix for 70 minutes at a speed of 180r / min.

[0024] Step 3: Add stearic acid, PBT, PC, propylene oxide and tributyl citrate, mix evenly, put into a twin-screw extruder, heat up to 200°C, extrude and granulate.

[0025] The transverse shrinkage rate of the product is 1.1%, the longitudinal shrinkage rate is 1.2%, the shrinkage ratio is 1.3, the Vicat softening point is 120°C; the tensile strength is 75MPa, and the impact strength is 85kJ / m 2 , elongation at break 300%; coefficient of friction 0.35, bending strength 75MPa.

Embodiment 2

[0027] Step 1: Weigh 100 parts of PLA, 30 parts of PBAT, 2.5 parts of PEG, 5 parts of calcium stearate, 2.5 parts of stearic acid, 35 parts of ACR, 40 parts of PBT, 40 parts of PC and 60 parts of propylene oxide according to the ratio of mass parts Parts, tributyl citrate is 17 parts.

[0028] Step 2: Put PBAT and PC into the reactor and mix for 75 minutes, add PLA, PEG, calcium stearate and ACR, raise the temperature to 110°C, and mix for 90 minutes at a speed of 240r / min.

[0029] Step 3: Add stearic acid, PBT, PC, propylene oxide and tributyl citrate, mix evenly, put into a twin-screw extruder, heat up to 240°C, extrude and granulate.

[0030] The transverse shrinkage rate of the product is 1.2%, the longitudinal shrinkage rate is 1.3%, the shrinkage ratio is 1.4, the Vicat softening point is 125°C; the tensile strength is 80MPa, and the impact strength is 90kJ / m 2 , elongation at break 350%; coefficient of friction 0.2, bending strength 80MPa.

Embodiment 3

[0032] Step 1: Weigh 100 parts of PLA, 15 parts of PBAT, 1 part of PEG, 2 parts of calcium stearate, 1 part of stearic acid, 20 parts of ACR, 25 parts of PBT, 25 parts of PC and 45 parts of propylene oxide according to the ratio of mass parts. Tributyl citrate is 14 parts.

[0033] Step 2: Put PBAT and PC into the reactor and mix for 35 minutes, add PLA, PEG, calcium stearate and ACR, raise the temperature to 90°C, and mix for 70 minutes at a speed of 180r / min.

[0034] Step 3: Add stearic acid, PBT, PC, propylene oxide and tributyl citrate, mix evenly, put into a twin-screw extruder, heat up to 200°C, extrude and granulate.

[0035] The transverse shrinkage rate of the product is 1.3%, the longitudinal shrinkage rate is 1.4%, the shrinkage ratio is 1.5, the Vicat softening point is 130°C; the tensile strength is 85MPa, and the impact strength is 95kJ / m 2 , elongation at break 400%; coefficient of friction 0.25, bending strength 85MPa.

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Abstract

The invention discloses polylactic acid toughening modification plastic and a preparation method thereof. The polylactic acid toughening modification plastic is prepared from PLA, PBAT, PEG, calcium stearate, stearic acid, ACR, PBT, PC, epoxypropane and tributyl citrate. The transverse product shrinkage is 1.1-1.5%, the longitudinal product shrinkage rate is 1.2-1.6%, the shrinkage ratio is 1.3-1.7, vicat softening temperature is 120-140 DEG C, the tensile strength is 75-95 MPa, the impact strength is 85-105 kJ / m<2>, the elongation at break is 300-500%, the friction coefficient is 0.15-0.35, and the bending strength of 75-95 MPa.

Description

technical field [0001] The invention relates to the technical field of plastics, in particular to a polylactic acid toughened modified plastic and a preparation method thereof. Background technique [0002] Plastic particles, commonly known as plastic particles, are raw materials for storage, transportation and processing of plastics in the form of semi-finished products. Plastic is a kind of polymer material. Calcium stearate, propylene, calcium chlorostearate, calcium benzene stearate, etc. can be prepared from petroleum. The molecules of these substances can react with each other under certain conditions to form a large molecular weight. Compounds, that is, polymers. [0003] The most prominent property of polypropylene is its versatility, which is suitable for many processing methods and uses. Its value and versatility mainly come from its excellent chemical resistance, the lowest density and highest melting point among all thermoplastics, and moderate cost. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L33/04C08L69/00C08K5/098C08K5/09C08K5/1515C08K5/11
Inventor 翟红波杨振枢韦洪屹
Owner SUZHOU POLYMER NEW MATERIALS TECH
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