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CuS/PDCPD (polydicyclopentadiene) nanocomposite

A composite material and nanotechnology, applied in the field of powder metallurgy materials, can solve the problems of restricting wide application and expensive silane coupling agent, and achieve the effect of reducing interface energy, wear quality and wear factor

Inactive Publication Date: 2018-06-01
刘芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, inorganic fillers are generally modified by coupling agents, but silane coupling agents are expensive, which limits their wide application in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0012] The raw materials for the preparation of nano-CuS / PDCPD composites include: WCl 6 : Analytical pure, Changsha Huajing Powder Materials Co., Ltd.; DCPD: Analytical pure, Zhejiang Hangzhou Yangli Petrochemical Co., Ltd., dewatered and liquefied before use; AlEt 2 Cl 2 : Industrial grade, Nanjing Shuanglian Chemical Industry; the main catalyst tungsten complex and the surface modifier pyridinium dihexadecyloxydithiophosphate (PyDDP) were synthesized by the laboratory; the rest of the chemical reagents were analytically pure, and the water used was for deionized water. The preparation steps of nano-CuS / PDCPD composite materials are as follows: the preparation of surface-modified CuS nano-powder adopts the surface in-situ grafting method. The typical preparation process is: respectively measure 50mL distilled water and ethanol into a 250mL three-necked flask, and then add 0.8gNa 2 S·9H 2 O and 1.5gPyDDP, heated until the solution was clear, using CH 3 COOH controls the ...

Embodiment example 2

[0014] Compared with PDCPD, there are obvious CuS aggregates in the unmodified CuS / PDCPD composite material, while the surface of the modified CuS / PDCPD composite material is relatively smooth, and no aggregates of CuS nanopowder are observed. The powder is most likely to have good dispersion in the PDCPD matrix.

Embodiment example 3

[0016]With the increase of the amount of modified CuS nanoparticles, the strength and modulus of nano-CuS / PDCPD composites showed a trend of first increasing and then decreasing; but within the range of CuS doping (≤2%), the modified nano-CuS The mechanical properties of the / PDCPD composites are higher than those of PDCPD; when the mass fraction of modified CuS is 1%, the mechanical properties of the composites reach the maximum. The maximum increase in tensile strength, bending strength and impact strength was 22.0%, 13.8% and 13.2% respectively; the tensile modulus and bending modulus increased by 46.5% and 19.7% respectively. Compared with the unmodified CuS powder when the mass fraction was 1%, the tensile strength, flexural strength and impact strength were increased by 53.5%, 23.3% and 45.7% respectively; the tensile modulus and flexural modulus Respectively increased by 67.5%, 28.5%. Obviously, the surface modification of CuS nanopowders has a great influence on the m...

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Abstract

The invention provides a CuS / PDCPD (polydicyclopentadiene) nanocomposite. The CuS / PDCPD nanocomposite is prepared from a W complex as a main catalyst, AlEt2Cl2 as a cocatalyst and surface modified CuSnanopowder as filler with a reaction injection molding process and an in-situ polymerization method. In a quite small adding range, modified CuS can have reinforcing, toughening and wear-resisting functions on PDCPD; when the adding percentage by mass of CuS is 1%, the optimal combination property of the CuS / PDCPD nanocomposite is realized; compared with performance of PDCPD, the maximum increaseamount of impact strength, tensile strength and bending strength are 13.2%, 22.0% and 13.8% respectively; wear mass and friction factor are reduced by 31% and 36% maximally. The surface modified CuSnanopowder has good interfacial compatibility in a PDCPD matrix, which is an important reason for realizing better mechanical properties and wear resistance of the CuS / PDCPD nanocomposite in a small adding range.

Description

technical field [0001] The invention relates to a powder metallurgy material, in particular to a nano CuS / PDCPD composite material. Background technique [0002] Polydicylopenadiene (PD-CPD) is a new type of high-impact engineering plastic that appeared in the international market after the 1990s. It is opened by dicyclopentadiene (DCPD) under the Ziegler-Natta catalytic system. A thermosetting polymer obtained by displacement polymerization. Because PDCPD has high elastic modulus, high impact strength and good thermal stability, its application range is very wide, and it has broad application prospects in transportation, electrical equipment, sports and entertainment facilities, building materials, communications and other fields. However, often because the inorganic filler is not dispersed or has poor dispersion in PDCPD products, it does not play the role of inorganic additives, but often leads to a decline in its chemical properties, and cannot effectively improve the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F132/08C08K9/04C08K3/30B82Y40/00
CPCC08F132/08B82Y40/00C08K3/30C08K9/04C08K2003/3009C08K2201/011
Inventor 刘芳
Owner 刘芳
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