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Nylon toughener, and preparation method and application thereof

A toughening agent and nylon technology, applied in the field of toughening nylon preparation, can solve the problems of reducing the efficiency of grafting polyolefins with polar monomers, reducing the mechanical properties of nylon materials, and the adverse effects of extrusion processes, and reducing cross-linking. and degradation side reactions, reducing the decline of mechanical properties, and excellent processing performance.

Active Publication Date: 2016-06-22
ENERGY RES INST OF SHANDONG ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen from the above-mentioned patents that the toughening agent, which is an important component of toughened nylon, uses peroxide as the initiator and is prepared by grafting reaction of polar monomers in the extruder, but the peroxide triggers In addition to the main reaction of grafting polyolefin with polar monomers, the agent will also cause many side reactions (such as polyethylene crosslinking or polypropylene degradation side reactions), which significantly reduces the grafting of polar monomers. The efficiency of the branched polyolefin, and the change of the melt index of the polyolefin material will affect the subsequent processing properties when mixed with nylon
When using this kind of grafted polyolefin and nylon for reactive extrusion to prepare toughened nylon, it will not only have a negative impact on the extrusion process; but also due to the low grafting rate of polyolefin, it is necessary to add a large amount of polyolefin to meet the toughness requirements of the material. This will significantly reduce the mechanical properties of the nylon material

Method used

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  • Nylon toughener, and preparation method and application thereof
  • Nylon toughener, and preparation method and application thereof
  • Nylon toughener, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: comparative example

[0042] Weigh 81.9 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0g / 10min), 15.0 parts of maleic anhydride, 0.1 part of dibenzoyl peroxide, 10103.0 parts of antioxidant, and mix maleic anhydride Dissolve in 10.0 parts of absolute ethanol, dissolve dibenzoyl peroxide in 5.0 parts of absolute ethanol, mix LDPE, dibenzoyl peroxide solution, maleic anhydride solution, and antioxidant 1010 in a high-speed mixer Mix evenly, add the above mixture into the hopper of the extruder, the temperature of each zone of the extruder is between 150°C and 180°C, the speed of the main screw is 60 rpm, the speed of the feeding screw is 10 rpm, and the extruded product is drawn, Cool, dry, and pelletize to obtain maleic anhydride grafted LDPE particles. Weigh 685.0 parts of nylon, 12.0 parts of maleic anhydride grafted LDPE, and 10103.0 parts of antioxidant, mix them evenly in a high-speed mixer, put them into th...

Embodiment 2

[0044] Weigh 82.0 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0 g / 10min), 15.0 parts of maleic anhydride, and 10103.0 parts of antioxidant. Put LDPE in the plasma reaction device, after vacuuming, pass in argon gas, the gas pressure is 100Pa, the radio frequency discharge power is 20W, and the discharge time is 10min, then the surface modified LDPE, adipic acid, and antioxidant 1010 are mixed for 30min, Put the mixture into the hopper of the extruder, and react under the conditions of 150-180°C, the speed of the main screw is 60 rpm, and the speed of the feeding screw is 10 rpm, and the extruded product is drawn, cooled, dried, cut granules to obtain maleic anhydride grafted LDPE granules. Weigh 685.0 parts of nylon, 12.0 parts of maleic anhydride grafted LDPE, and 10103.0 parts of antioxidant, mix them evenly in a high-speed mixer, put them into the hopper of the extruder, and set the temperature between 200°C and 260°C at the mai...

Embodiment 3

[0046] Weigh 82.0 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0 g / 10min), 15.0 parts of maleic anhydride, and 10103.0 parts of antioxidant. Put LDPE in the plasma reaction device, after vacuuming, pass in argon / oxygen (volume ratio 4 / 1) mixed gas, the gas pressure is 100Pa, the radio frequency discharge power is 20W, and the discharge time is 10min, then the surface modified LDPE, Mix adipic acid and antioxidant 1010 for 30 minutes, put the mixture into the hopper of the extruder, and react under the conditions of 150-180 ° C, the main screw speed is 60 rpm, and the feeding screw speed is 10 rpm. The extruded product is drawn, cooled, dried and pelletized to obtain maleic anhydride grafted LDPE pellets. Weigh 685.0 parts of nylon, 12.0 parts of maleic anhydride grafted LDPE, and 10103.0 parts of antioxidant, mix them evenly in a high-speed mixer, put them into the hopper of the extruder, and set the temperature between 200°C and 26...

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Abstract

The invention discloses a nylon toughener, and a preparation method and application thereof. The preparation method comprises the following steps: putting polyolefins in a plasma reactor, vacuumizing, introducing gas, and carrying out surface treatment on the polyolefins by using low-temperature plasma so as to generate hydroxyl, carboxyl and other active groups on the surface, thereby obtaining the surface-modified polyolefins; and carrying out reaction on the surface-modified polyolefins, a polar compound and an antioxidant to obtain the polar-compound-graft-modified polyolefins, which are the nylon toughener. The low-temperature plasma technique is utilized to increase the types and concentration of the active groups (such as hydroxyl, carboxyl, carbonyl and amino) generated on the polyolefin surface on the premise of not introducing any free-radical initiator, thereby enhancing the grafting efficiency.

Description

technical field [0001] The invention relates to a preparation method of toughened nylon, in particular to a preparation method and application of a nylon toughening agent combined with low-temperature plasma and toughened nylon. Background technique [0002] Nylon is one of the most widely used and most diverse engineering plastics. The material has good mechanical properties, heat resistance, wear resistance, chemical solvent resistance, self-lubrication and certain flame retardancy. It has excellent performance and can be integrated into complex structural parts, and is widely used in automobiles, electronic appliances, machinery, rail transit, sports equipment and other fields. However, the shortcomings of strong water absorption and poor low-temperature impact performance limit the application range of nylon materials. [0003] Mixing polyolefin or polyolefin elastomer with nylon can significantly improve the material's shortcomings of strong water absorption and poor l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08F110/02C08L77/02C08L77/06C08L23/06C08K5/134
CPCC08F8/00C08L77/02C08L77/06C08F110/02C08L23/06C08K5/1345
Inventor 蒋波蔡飞鹏杨改王波
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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