Aromatic polyamide-contained ternary alloy and preparation method thereof

A technology of aromatic polyamide and naphthalene aromatic polyamide, which is applied to the field of ternary alloy containing aromatic polyamide and its preparation, and can solve the problems of limiting the application scope of aromatic polyamide, difficulty in processing, exceeding and the like.

Active Publication Date: 2019-04-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the strong hydrogen bond interaction between the chains of aromatic polyamides, its melting temperature has exceeded the decomposition temperature, and the post-processing process is very difficult.
And the high crystallinity also makes the solubility of this material very weak, generally only soluble in concentrated sulfuric acid
These disadvantages have greatly limited the application range of aromatic polyamides in blended materials.

Method used

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  • Aromatic polyamide-contained ternary alloy and preparation method thereof
  • Aromatic polyamide-contained ternary alloy and preparation method thereof
  • Aromatic polyamide-contained ternary alloy and preparation method thereof

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preparation example Construction

[0039] In the present invention, the aromatic polyamide is a method for preparing aromatic polyamide containing naphthalene, preferably comprising the following steps: 1,5-naphthalene diamine and 4,4'-diphenyl ether diacid chloride are 1 in a molar ratio: Mixed in a ratio of 1, using NMP as a solvent and LiCl as a catalyst to undergo a polymerization reaction at room temperature; the present invention does not have any special restrictions on the amount of NMP and LiCl, and the amount known to those skilled in the art can be used. In the present invention, the structural formula of the naphthalene-containing aromatic polyamide is preferably:

[0040]

[0041] In the present invention, there is no special limitation on n in the structural formula, and the reduced viscosity of the aromatic polyamide containing naphthalene can be in the range of 0.4 to 1.0 dL / g, and the glass transition temperature can be in the range of 285 to 288°C. Can.

[0042] The present invention also ...

Embodiment 1

[0061] Mix 6g of PK-1 powder, 6g of PEI powder, 1g of LiCl and 60mL of NMP, dissolve it under stirring conditions and discharge it into deionized water. After pulverizing the crude product, wash it three times with boiled deionized water and absolute ethanol respectively. Dry to obtain powdered PK-1 / PEI binary blend;

[0062] After mixing 94g of PEEK powder and 6g of PK-1 / PEI binary blend powder, add it to a high-speed mixer, stir at a high speed for 10 minutes, mix well, put it in a vacuum oven at 100°C for 8 hours, and add the dried mixture Into a twin-screw extruder, extrude at a temperature of 370°C and a screw speed of 40r / min, granulate, and dry in vacuum at 120°C for 12 hours to obtain PEEK / PEI / PK-1 ternary alloy pellets material;

[0063] PEEK / PEI / PK-1 ternary alloy pellets were injection molded under the conditions of 380°C and 750bar, and then annealed at 210°C for 4 hours to obtain PEEK / PEI / PK-1 ternary alloy.

Embodiment 2

[0065] Mix 10g of PK-1 powder, 10g of PEI powder, 2g of LiCl and 150mL of NMP, dissolve under stirring conditions and discharge in deionized water, grind the crude product and wash with boiled deionized water and absolute ethanol three times respectively, Dry to obtain powdered PK-1 / PEI binary blend;

[0066] After mixing 90g of PEEK powder and 10g of PK-1 / PEI binary blend powder, add it to a high-speed mixer, stir at a high speed for 10 minutes, mix well, put it in a vacuum oven at 100°C for 8 hours, and add the dried mixture Into a twin-screw extruder, extrude at a temperature of 380°C and a screw speed of 40r / min, granulate, and dry in vacuum at 120°C for 12 hours to obtain PEEK / PEI / PK-1 ternary alloy pellets material;

[0067] PEEK / PEI / PK-1 ternary alloy pellets were injection molded under the conditions of 400°C and 900bar, and then annealed at 200°C for 5 hours to obtain PEEK / PEI / PK-1 ternary alloy.

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Abstract

The invention relates to the technical field of polymer materials, in particular to an aromatic polyamide-contained ternary alloy and a preparation method thereof. The provided aromatic polyamide-contained ternary alloy is prepared from, by weight, 70-94 parts of polyether ether ketone, 3-20 parts of polyetherimide and 3-10 parts of aromatic polyamide; aromatic polyamide contains an ether ketone structure or naphthalene. According to records of the embodiment, the friction coefficient of the ternary alloy is reduced by 4.7% or above in comparison with that of pure-phase PEEK, the wear rate isreduced by 35.3% or above, and the mechanical property of the ternary alloy is greatly improved in comparison with that of the pure-phase PEEK.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a ternary alloy containing aromatic polyamide and a preparation method thereof. Background technique [0002] Polyetheretherketone (PEEK) is a special engineering plastic with excellent comprehensive properties. As a semi-crystalline thermoplastic polymer material, it has excellent flame retardancy, radiation resistance, high temperature resistance and mechanical properties. At the same time, in terms of friction and wear properties, polyether ether ketone is another good anti-friction and wear-resistant material after polytetrafluoroethylene (PTFE). Therefore, it is widely used in aerospace, instrumentation and automobile industry and other fields. [0003] Aromatic polyamide (PK) was first developed by DuPont in 1967. It has good high temperature resistance, chemical resistance and fatigue resistance, and its friction resistance is very excellent. At present, it ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/16C08L79/08C08L77/10
CPCC08L61/16C08L2205/03C08L79/08C08L77/10
Inventor 张海博高雁伟刘新徐达魏嘉欣周晨义
Owner JILIN UNIV
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