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A method for toughening and modifying rigid polyvinyl chloride

A technology of rigid polyvinyl chloride and toughening modification, which is applied in the field of toughening modification of polymer composite materials, can solve problems such as poor toughness, achieve improved elongation at break, increase impact strength, and increase elongation at break Effect

Active Publication Date: 2016-01-13
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the performance defect of poor toughness of rigid polyvinyl chloride, the object of the invention is to provide a method for toughening and modifying rigid polyvinyl chloride, using graphene to toughen rigid polyvinyl chloride, graphene nano-carbon material It has excellent properties such as soft lamellar structure and large specific surface area, and is suitable for use as a polymer toughening agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare a composite material of PVC powder (particle size 50-80 μm) and graphene powder (layer thickness 5-10 nm, diameter 5-10 μm) at a weight ratio of 100:0.4.

[0034] 69g of polyvinyl chloride, 4.83g of fatty acid rare earth stabilizer, 1.03g of acrylate (ACR) and 0.276g of graphene were stirred and mixed uniformly by a high-speed stirrer to obtain a composite powder with uniform dispersion of graphene. Melt and mix for 5 minutes at 165° C. and 60 rpm with a torque rheometer. Then, the melt-mixed composite material was kneaded for 5 minutes with a double-roll mill at 165°C and the rotation speed ratio of the front and rear rolls was 1:1.1 to form a sheet-shaped composite material. Then heat-press for 10 minutes at 185° C. and a pressure of 15 MPa by a flat vulcanizer to make a composite plate with a thickness of 2 mm. According to the national standard, the test sample is cut. After testing, the elongation at break of the composite material is 200%, and the notched...

Embodiment 2

[0036] A composite material with a weight ratio of PVC powder and graphene powder of 100:0.2 was prepared.

[0037]The preparation process is the same as in Example 1, the amount of graphene used is 0.138g, and the amount of other components remains unchanged. After testing, the elongation at break of the composite material is 170%, and the notched impact strength is 10.83KJ / m 2 .

Embodiment 3

[0039] A composite material with a weight ratio of PVC powder and graphene powder of 100:0.4 was prepared. The preparation process was the same as in Example 1, the amount of graphene used was 0.276 g, the stabilizer was changed to calcium zinc stabilizer (CH400), and the amount of other components remained unchanged. After testing, the elongation at break of the composite material is 196%, and the notched impact strength is 11.88KJ / m 2 .

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Abstract

The invention belongs to the toughening and modifying field of polymer composite materials, in particular relates to a method for toughening and modifying a rigid polyvinyl chloride composite material and aims at obtaining a graphene / polyvinyl chloride composite material and solving the performance defect of poor toughness of the rigid polyvinyl chloride material. A graphene carbon nanomaterial is evenly dispersed in a polyvinyl chloride matrix, a soft lamellar structure of the graphene capable of curling and bending in the polyvinyl chloride matrix serves as an elastic particle phase so as to play a role of toughening and modifying the polyvinyl chloride. Polyvinyl chloride powder, a stabilizer, a modifier acrylate and the graphene carbon nanomaterial are premixed in a high-speed stirrer to obtain the graphene / polyvinyl chloride composite material by using a process of melt bending through a torque rheometer and a two-roll mill and a process of hot pressing molding through a flat vulcanizing machine. According to the method for toughening and modifying rigid polyvinyl chloride, the soft and curly graphene layer plays a role of elastic particle in the polyvinyl chloride, so that the breaking elongation and the notch impact strength of the polyvinyl chloride can be obviously improved.

Description

technical field [0001] The invention belongs to the field of toughening and modifying polymer composite materials, in particular to a method for toughening and modifying rigid polyvinyl chloride composite materials to obtain graphene nano-carbon material / polyvinyl chloride composite materials. Background technique [0002] Polyvinyl chloride (PVC) is a general-purpose thermoplastic resin that is widely used. It has good chemical corrosion resistance, abrasion resistance, flame retardancy and other properties, and is low in price. It is widely used in industries, agriculture, packaging and construction. Has been widely used. However, rigid polyvinyl chloride has the obvious disadvantage of high brittleness, which limits its use as a high-performance structural material. Therefore, the toughening modification of rigid polyvinyl chloride has always been a hot spot in the research of polyvinyl chloride materials. [0003] In order to achieve the purpose of improving the toughn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K7/00C08K3/04
Inventor 曾尤王函谢桂媛杨铖英哲任文才成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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