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POSS/casting nylon 6 nano composite material and preparation method and application thereof

A nano-composite material and casting nylon technology are applied to casting nylon 6 materials and their preparation and application fields, which can solve the problems of low water absorption rate and good thermal stability, and achieve low water absorption rate, good thermal stability and reduced water absorption rate. Effect

Inactive Publication Date: 2017-08-04
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the disadvantages of poor thermal stability, high water absorption and wear resistance of cast nylon 6, etc., uses POSS to disperse or modify in caprolactam monomer melt, and then adds catalyst and initiator to initiate cast nylon 6 Reaction molding, so that the nylon molecular chain runs through the cage-shaped holes of POSS, and chemically bonds with POSS to prepare a POSS / cast nylon 6 nanocomposite material, which has low water absorption, good thermal stability, and wear resistance High, good overall performance

Method used

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  • POSS/casting nylon 6 nano composite material and preparation method and application thereof
  • POSS/casting nylon 6 nano composite material and preparation method and application thereof
  • POSS/casting nylon 6 nano composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Select the ratio of raw materials in Table 1, wherein POSS selects hexahedral oligomeric silsesquioxane for use.

[0047] S1. Add POSS, water and organic modifier according to the above proportions into kettle A containing caprolactam monomer 1, adjust the temperature of kettle A to 70-85°C, and carry out stirring reaction for 0.5-2 hours;

[0048] S2. Warm up the kettle A in step S1 to 130-140° C., and vacuumize for 15-60 minutes under a certain degree of vacuum. The vacuum degree of said vacuum-evacuation is 99000-99997 Pa; then add an initiator to react in a vacuum for 15-30 minutes;

[0049] S3. Put the caprolactam monomer 2 into the kettle B, heat until the caprolactam monomer 2 melts and start vacuuming, the caprolactam monomer 2 is completely melted, add the catalyst and heat up to 130-140°C, and continue vacuuming for 10-15 minutes;

[0050] S4. After mixing the materials obtained in kettle A and kettle B, pour them into a mold at 150-170°C for polymerization an...

Embodiment 2

[0053] The present embodiment selects the raw material proportioning in Table 1 for use, and difference with embodiment 1 is that POSS selects the hexahedral oligomeric silsesquioxane with hydroxyl functional group for use. Its preparation method is identical with embodiment 1.

[0054] The properties of the prepared POSS / cast nylon 6 nanocomposites are shown in Table 1.

Embodiment 3

[0056] The present embodiment selects the raw material proportioning in table 1 for use, and difference with embodiment 1 is that POSS selects the POSS that organic matrix is ​​long-chain fluoroalkyl for use. Its preparation method is identical with embodiment 1.

[0057] The properties of the obtained POSS / cast nylon 6 nanocomposites are shown in Table 2.

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Abstract

The invention discloses a POSS / casting nylon 6 nano composite material and preparation method and thereof. The preparation method comprises the following steps: adding POSS, water and an organic modifying agent in a kettle A containing caprolactam monomers, heating to the temperature of 70-85 DEG C, stirring for 0.5-2 hours, carrying out vacuumizing for 15-60 minutes, heating to the temperature of 130-140 DEG C, adding an initiator, and carrying out vacuumizing reaction for 15-30 minutes; heating a kettle B containing caprolactam monomers until the monomers are melted, carrying out vacuumizing, adding a catalyst after the monomers are totally melted, heating to the temperature of 130-140 DEG C, and carrying out vacuumizing for 10-15 minutes; and finally mixing the compound in the kettle A with the compound in the kettle B, pouring the mixture in a mold at the temperature of 150-170 DEG C for polymerization molding, and carrying out demolding after insulating for 10-60 minutes. By a frame structure of POSS and organic functional groups thereof, and a nylon molecular chain and POSS form an interpenetrating polymer network structure and are bonded chemically. The prepared nano composite material is low in water absorption, good in thermal stability, high in wear resistance and god in comprehensive property.

Description

technical field [0001] The present invention relates to casting nylon 6 material and its preparation and application, more specifically, relate to a kind of POSS / casting nylon 6 nano-composite material and its preparation method and application. Background technique [0002] In 1960, Monsanto Company of the United States first poured caprolactam molten monomer at 140°C and a basic catalyst directly into a mold at 150-200°C, and made molded products under normal pressure for about 15 minutes. This product is called Monomer Casting Nylon, or MCPA6. Cast nylon 6 has higher molecular weight, crystallinity, and better physical properties than ordinary PA6 because it is rapidly polymerized and molded at a temperature lower than the melting temperature of PA6. [0003] In addition to the advantages of light weight, good mechanical properties, low noise, wear resistance and self-lubrication, cast nylon 6 also has some shortcomings, such as poor low-temperature impact performance, p...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L83/04C08L83/06C08L83/08C08L83/07C08G69/16
CPCC08G69/16C08L77/02C08L83/08C08L2201/08C08L2203/18C08L83/04C08L83/06
Inventor 赖登旺夏勇李玉华刘跃军杨军
Owner HUNAN UNIV OF TECH
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