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Reinforced and toughened nylon 6 resin, nylon alloy and preparation method

A resin, in-situ polymerization technology, used in the preparation of reinforced and toughened nylon 6 resin, nylon alloy resin, nylon alloy and preparation fields, can solve the problems of the decline of the total crystallization rate of composite materials, obstacles, etc., to improve toughness, tensile strength, etc. Effects of reduced strength and flexural strength, and reduced phase separation of rubber components

Active Publication Date: 2018-09-11
RUINAI COMPOSITE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kinetic analysis shows that MWCNTs have a nucleation effect, which increases the crystallization temperature of nylon-6, and covalent bonds make MWCNTs have a strong hindering effect on the molecular chain movement of nylon-6, resulting in a composite material with a mass fraction of MWCNTs of 2wt%. The overall crystallization rate decreased

Method used

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  • Reinforced and toughened nylon 6 resin, nylon alloy and preparation method
  • Reinforced and toughened nylon 6 resin, nylon alloy and preparation method
  • Reinforced and toughened nylon 6 resin, nylon alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Hydroxyl-terminated liquid polybutadiene HTPB treatment

[0027] Add 35g of hydroxyl-terminated liquid rubber (hydroxyl-terminated liquid polybutadiene HTPB, number average molecular weight is 2300) into 50g of dry dehydrated xylene solvent, add 50g of HDI uretdione, and react at 80℃~110℃ for 3h under the protection of nitrogen , then raise the temperature to 130°C for 2 hours, add 35g of vacuum-dehydrated caprolactam to react for 3 hours, control the reaction temperature at 120°C to 140°C, then lower it to room temperature, add excess isopropanol solvent, and let it stand overnight to precipitate the caprolactam-capped rubber activator , after several times of isopropanol solvent purification, vacuuming to remove small molecular substances, to obtain HDI uretdione grafted and caprolactam-capped hydroxyl-terminated liquid rubber.

[0028] 2) Surface modification of hydroxylated carbon nanotubes

[0029] The length of the hydroxylated carbon nanotubes used is 10-30um...

Embodiment 2

[0036] 1) Hydroxyl-terminated liquid nitrile rubber HTBN treatment

[0037] Adopt hydroxyl-terminated liquid nitrile rubber HTBN, wherein the number-average molecular weight of hydroxyl-terminated liquid nitrile rubber HTBN is 4500, 68g hydroxyl-terminated liquid nitrile rubber HTBN is added in the dry dehydrated 100g xylene solvent, add 50gHDI uretdione, Under the protection of nitrogen, react at 110°C for 3 hours, then raise the temperature to 130°C for 2 hours, add 35g of vacuum dehydrated caprolactam to react for 3 hours, control the reaction temperature at 120°C to 140°C, the reaction temperature can be 120°C, or 130°C, 140°C, then Cool down to room temperature, add excess isopropanol solvent, and let it stand overnight to precipitate caprolactam-capped rubber activator. After several times of isopropanol solvent purification, vacuumize to remove small molecular substances, and obtain HDI uretdione for grafting. Caprolactam-terminated hydroxyl-terminated liquid rubber.

...

example 2

[0040] Example 2, the mechanical properties of the modified nylon sample are shown in Table 1.

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Abstract

The invention provides reinforced toughened nylon 6 resin, nylon alloy and a method for preparing the reinforced toughened nylon 6 resin. The reinforced toughened nylon 6 resin, the nylon alloy and the method have the advantages that the carbon nano-tube doped rubber modified nylon 6 resin can be prepared from grafted hydroxyl-terminated liquid rubber and surface-modified hydroxylated carbon nano-tubes by the aid of anionic in-situ polymerization technologies, can be directly applied and also can be used as master batch, the master batch and other resin are subjected to melting extrusion to be mixed with each other for preparing multi-purpose and high-performance high-polymer alloy materials, accordingly, the shortcoming of uneven dispersion of components and carbon nano-tubes in high-polymer alloy blending procedures can be effectively overcome by the aid of the method, and the alloy resin is excellent in performance.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, provides a reinforced and toughened nylon 6 resin, a nylon alloy and a preparation method, and relates to a method for preparing and toughening nylon 6 resin by in-situ polymerization of modified carbon nanotubes doped with liquid rubber. The preparation of its nylon alloy resin. Background technique [0002] Modification of nylon by polymer alloy method, such as copolymerization modification of nylon by polyolefin, rubber elastomer, etc., can improve the notched impact strength of nylon at low temperature and dry state, and reduce water absorption. Duan Yufeng and others studied the preparation of maleic anhydride melt-grafted ethylene-propylene rubber by solution method and the compatibility and toughening effect of the graft on PA. Adding MAH-g-EPDM with a mass fraction of 5wt% to nylon can significantly improve the impact strength of PA6 (impact strength at room temperature in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L15/00C08K9/04C08K7/00C08K3/04C08G69/16
CPCC08G69/16C08K2201/011C08L77/02C08L15/00C08K9/04C08K7/00C08K3/04
Inventor 赵洪凯肖力光胡洪亮李晶辉
Owner RUINAI COMPOSITE MATERIAL
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