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Strengthened and toughened PVC composition and preparation method thereof

A technology of strengthening, toughening, and composition, which is applied in the field of plastic processing, can solve problems such as poor dispersion, poor interface bonding, and strength decline, and achieve the effects of eliminating agglomeration, high strength and toughness, and avoiding strength decline

Inactive Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is: to overcome the deficiencies of the prior art, to provide a kind of reinforced and toughened PVC composition with higher strength and high toughness and its preparation method, to solve the problem of strength decrease when general PVC is toughened
[0006] The present invention uses carbon nanotubes to improve the strength and toughness of PVC. At the same time, carbon nanotubes are coated with PVC to enhance the affinity between carbon nanotubes and PVC resin, so as to solve the problem of poor dispersion and interface problems of carbon nanotubes when blended with PVC. The problem of poor bonding prevents the agglomeration of carbon nanotubes and ensures the strengthening and toughening effect of carbon nanotubes on the composition

Method used

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Examples

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Effect test

Embodiment 1

[0026] The coated carbon nanotubes in embodiment 1 and comparative examples are PVC / surfactant coated carbon nanotubes, and the preparation process is: PVC is dissolved in tetrahydrofuran, the mass ratio of PVC and tetrahydrofuran is 1:8, then to tetrahydrofuran Surfactant and carbon nanotubes are added into the mixture, the amount of surfactant added is 2% of the mass of carbon nanotubes, the amount of added carbon nanotubes is 25% of the mass of PVC, after stirring for 30min, tetrahydrofuran is extracted and recovered to obtain PVC / surfactant-coated carbon nanotubes.

Embodiment 2

[0027] The coated carbon nanotubes of Example 2 are PVC / surfactant-coated carbon nanotubes, and the preparation process is as follows: dissolve PVC in tetrahydrofuran, the mass ratio of PVC to tetrahydrofuran is 1:7, and then add surfactant to tetrahydrofuran. agent and carbon nanotubes, the amount of surfactant added is 3% of the mass of carbon nanotubes, the amount of added carbon nanotubes is 20% of the mass of PVC, after stirring for 30min, tetrahydrofuran is extracted and recovered to obtain PVC / surfactant package coated carbon nanotubes.

Embodiment 3

[0028] The coated carbon nanotubes of Example 3 are PVC / surfactant-coated carbon nanotubes, and the preparation process is as follows: dissolve PVC in tetrahydrofuran, the mass ratio of PVC to tetrahydrofuran is 1:5, and then add surfactant to tetrahydrofuran. agent and carbon nanotubes, the amount of surfactant added is 5% of the mass of carbon nanotubes, the amount of added carbon nanotubes is 10% of the mass of PVC, after stirring for 20min, tetrahydrofuran is extracted and recovered to obtain PVC / surfactant coated carbon nanotubes.

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Abstract

A strengthened and toughened PVC composition and a preparation method thereof belongs to the technical field of plastic processing. The strengthened and toughened PVC composition comprises, by weight, 100 parts of PVC, 1.5-2.5 parts of an organic tin stabilizer, 4-8 parts of PVC / surfactant coated carbon nanotubes, 1.5-2.5 parts of a processing assistant ACR, 1.0-1.5 parts of a lubricant, 1.5-2.5 parts of titanium dioxide and 7-12 parts of fine calcium carbonate. The preparation method comprises the following steps: weighing above materials, putting the materials in a mixer, blending the materials, and discharging the obtained material to prepare the strengthened and toughened PVC composition. The PVC material is modified with the PVC / surfactant coated carbon nanotubes, so the agglomeration phenomenon of the carbon nanotubes is eliminated, the PVC material has high strength and toughness, and the strength decrease problem brought by a general toughening modifier is avoided.

Description

technical field [0001] A reinforced and toughened PVC composition and a preparation method thereof belong to the technical field of plastic processing. Background technique [0002] Although the PVC material has high strength, it generally has the problem of high brittleness, which affects its application. In order to make up for its shortcomings, tougheners such as CPE, MBS, ACR, ABS, and ASA are usually added to the formula to greatly improve the toughness of PVC materials, but the use of tougheners will reduce the strength and Vicat softening temperature of the material. In order to solve this problem, rigid particles such as nano-montmorillonite, nano-calcium carbonate, inorganic compound whiskers, glass fibers, carbon fibers, carbon nanotubes and other nano-scale particles are applied to PVC materials, but because nano-scale particles are easy to agglomerate, polymerization When the compound is blended, there are problems of poor dispersion and poor interfacial bonding...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/06C08K9/10C08K5/57C08K7/24C08K3/22C08K3/26
Inventor 刘浩李静王晶张新华刘容德孙丽朋桂俊杰王晓敏张桦孙培培盛梅
Owner CHINA PETROLEUM & CHEM CORP
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