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Process for producing high-strength high-ductility hard polyvinyl chloride

A technology of rigid polyvinyl chloride and polyvinyl chloride, which is applied in the field of materials to achieve the effects of improving impact strength, increasing stiffness, and large industrial practical value

Inactive Publication Date: 2011-05-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to obtain a high-performance PVC modification system that can not only ensure the excellent comprehensive performance of the matrix, but also improve the impact resistance

Method used

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  • Process for producing high-strength high-ductility hard polyvinyl chloride
  • Process for producing high-strength high-ductility hard polyvinyl chloride
  • Process for producing high-strength high-ductility hard polyvinyl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (a) 1.2 g of MWNTs with a diameter of 30-50 nm and a length of 15 μm were mixed with 120 ml of concentrated nitric acid, ultrasonically oscillated for 10 minutes, and reacted under reflux at 70° C. for 24 hours. After the mixture was cooled, it was diluted with distilled water, vacuum-filtered with a cellulose membrane (pore size 0.45 μm) until the pH value of the filtrate was neutral, and the filter cake was vacuum-dried at 60° C. for 12 hours.

[0039] (b) Mix 1gMWNTs-COOH obtained in the first step with 40mlSOCl 2 Reflux and stir at 65°C for 24 hours. After cooling, the reaction mixture was diluted with anhydrous tetrahydrofuran, filtered through a polyvinylidene fluoride membrane (pore size 0.45 μm), repeated three times, and dried in vacuum at room temperature for 2 hours.

[0040] (c) 1 g of MWNTs-COCl after vacuum drying and 10 g of polycaprolactone were stirred and reacted in 10 mL of 1,2-dichlorobenzene at 120° C. for 60 hours. Wash with hot absolute ethanol, ...

Embodiment 2

[0043] (a) 1.2 g of MWNTs with a tube diameter of 8-15 nm and a length of 50 μm were mixed with 120 ml of concentrated nitric acid, ultrasonically oscillated for 10 minutes, and reacted under reflux at 70° C. for 24 hours. After the mixture was cooled, it was diluted with distilled water, vacuum-filtered with a cellulose membrane (pore size 0.45 μm) until the pH value of the filtrate was neutral, and the filter cake was vacuum-dried at 60° C. for 12 hours.

[0044] (b) Mix 1gMWNTs-COOH obtained in the first step with 40mlSOCl 2 Reflux and stir at 65°C for 24 hours. After cooling, the reaction mixture was diluted with anhydrous tetrahydrofuran, filtered through a polypropylene filter (pore size 0.45 μm), repeated three times, and vacuum-dried at room temperature for 2 hours.

[0045] (c) 1 g of MWNTs-COCl after vacuum drying and 10 g of polycaprolactone were stirred and reacted in 10 mL of 1,2-dichlorobenzene at 120° C. for 60 hours. Wash with hot absolute ethanol, and suction...

Embodiment 3

[0048](a) 1.2 g of MWNTs with a tube diameter of 30-50 nm and a length of 15 μm were mixed with 120 ml of concentrated nitric acid, ultrasonically oscillated for 5 minutes, and reacted under reflux at 70° C. for 24 hours. After the mixture was cooled, it was diluted with distilled water, vacuum-filtered with a cellulose membrane (pore size 0.45 μm) until the pH value of the filtrate was neutral, and the filter cake was vacuum-dried at 60° C. for 12 hours.

[0049] (b) Mix 1gMWNTs-COOH obtained in the first step with 40mlSOCl 2 Reflux and stir at 65°C for 24 hours, dilute the reaction mixture with anhydrous tetrahydrofuran after cooling, and suction filter with a polyvinylidene fluoride filter membrane (pore size 0.8 μm), repeat this process 3 times, and vacuum dry at room temperature for 2 hours.

[0050] (c) 1 g of MWNTs-COCl after vacuum drying and 10 g of polycaprolactone were stirred and reacted in 10 mL of tetrahydrofuran at 70° C. for 19 hours. Wash with hot absolute et...

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Abstract

This invention pertains to the field of material technology, in particular relates to a preparation method of high strength and high tenacity rigid polyvinyl chloride. The specific steps are as follows: mixing a carbon nano tube with concentrated nitric acid under certain conditions for obtaining an acidulated carbon nano tube; mixing the acidulated carbon nano tube with SOCl2 for obtaining the carbon nano tube with an acyl chloride group; and then mixing polycaprolactone with the carbon nano tube with the acyl chloride group for obtaining the carbon nano tube of polycaprolactone chemical grafting. Polyvinyl chloride power, plasticizing agent, composite stabilizer, filling agent, whitening agent, lubricating agent and the carbon nano tube are pre-mixed in certain proportion in a high-speed mixer, and then a dual-roller mill is used for plasticizing and finally the high strength and high tenacity rigid polyvinyl chloride is obtained by rolling under certain pressure. The invention has the advantages of available raw materials, simple process, using existing industrial equipment of polyvinyl chloride, relatively low price, excellent product performances and important application value.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a high-strength and high-toughness rigid polyvinyl chloride composite material. Background technique [0002] Polyvinyl chloride is the second most commonly used plastic in the world after polyethylene, and is widely used in building materials, household products, consumer products, office supplies, and seals in automobiles, among others. However, rigid polyvinyl chloride has poor toughness and is a brittle material, which greatly limits the application range of polyvinyl chloride. At present, commonly used blending modifiers include acrylic resin (ACR), SBS, chlorinated polyethylene (CPE), NBR and EVA, and some non-elastomers such as PS, PP, PMMA, etc. and some nanoparticles such as SiO 2 , CaCO 3 wait. These toughening modifiers can improve the impact resistance of PVC to a certain extent, but at the same time, the heat resistance, stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K9/04C08K3/04
Inventor 王国建王丽娟赵明君祖梅
Owner TONGJI UNIV
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