Low-temperature-resistant low-water-absorption modified nylon material and preparation method thereof

A technology of modified nylon and low water absorption, applied in the field of engineering plastic modification, can solve the problems of high water absorption, poor low temperature properties, low toughness of PA66 resin, and achieve the effects of low water absorption, good low temperature properties and excellent low temperature properties

Active Publication Date: 2021-04-02
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] PA66 is a widely used engineering plastic, which is a crystalline polymer. There are strong hydrogen bonds between the amide groups on the molecular chain, high crystallinity and melting point, and excellent mechanical properties, so its mechanical properties are excellent. , such as high strength, high modulus, high hardness, etc.; but pure PA66 resin has low toughness, high water absorption, and poor low temperature characteristics, so it needs to be improved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Nylon 66: 100 parts by weight with a viscosity of 2.4; nylon 610: 60 parts by weight with a viscosity of 2.7; toughening agent: 10 parts by weight; compounding of antioxidant 1098 and antioxidant 168 (1: 1): 0.5 parts by weight share.

[0032] The above-mentioned components are weighed respectively according to the parts by weight, put into a high mixer and mix for 5 minutes, put the mixed raw materials into the main feeding port of the screw machine, extrude and granulate, the rotating speed of the screw machine is 300r / min, and the processing temperature 230-290°C, the low-temperature-resistant and low-water-absorbing modified nylon material involved in this example is obtained, and the normal temperature notched impact strength measured according to the national standard is 7.5kJ / m -2 , low temperature notched impact strength 8.2kJ / m -2 , Water absorption 0.4%.

Embodiment 2

[0034] Nylon 66: 100 parts by weight with a viscosity of 2.8; nylon 610: 80 parts by weight with a viscosity of 3.2; toughening agent: 8 parts by weight; compounding (1: 1) of antioxidant 1098 and antioxidant 168: 1 weight share.

[0035] The above-mentioned components are weighed respectively according to the parts by weight, put into a high mixer and mix for 5 minutes, put the mixed raw materials into the main feeding port of the screw machine, extrude and granulate, the rotating speed of the screw machine is 300r / min, and the processing temperature 230-290°C, the low-temperature-resistant and low-water-absorbing modified nylon material involved in this example is obtained, and the normal temperature notched impact strength measured according to the national standard is 7.2kJ / m -2 , low temperature notched impact strength 7.8kJ / m -2 , Water absorption 0.45%.

Embodiment 3

[0037] Nylon 66: 100 parts by weight with a viscosity of 3.2; nylon 610: 65 parts by weight with a viscosity of 3.5; toughening agent: 14 parts by weight; compounding (1: 1) of antioxidant 1098 and antioxidant 168: 1 weight share.

[0038] The above-mentioned components are weighed respectively according to the parts by weight, put into a high mixer and mix for 5 minutes, put the mixed raw materials into the main feeding port of the screw machine, extrude and granulate, the rotating speed of the screw machine is 300r / min, and the processing temperature 230-290°C, the low-temperature-resistant and low-water-absorbing modified nylon material involved in this example is obtained, and the normal temperature notched impact strength measured according to the national standard is 8.1kJ / m -2 , low temperature notched impact strength 9.0kJ / m -2 , water absorption 0.3%.

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PUM

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Abstract

The invention discloses a low-temperature-resistant low-water-absorption modified nylon material and a preparation method thereof. The modified nylon material comprises the following raw materials inparts by weight: 100 parts of nylon 66, 60-80 parts of nylon 610, 6-14 parts of a toughening agent and 0.5-1 part of an antioxidant. The water absorption rate of the modified nylon material is as lowas 0.3%, and the water absorption rate is relatively low; and meanwhile, the low-temperature performance of the modified nylon material is superior to that of normal-temperature performance, and the low-temperature characteristic is good.

Description

technical field [0001] The invention relates to the technical field of modification of engineering plastics, in particular to a modified nylon material with low temperature resistance and low water absorption and a preparation method thereof. Background technique [0002] PA66 is a widely used engineering plastic, which is a crystalline polymer. There are strong hydrogen bonds between the amide groups on the molecular chain, high crystallinity and melting point, and excellent mechanical properties, so its mechanical properties are excellent. , such as high strength, high modulus, high hardness, etc.; but pure PA66 resin has low toughness, high water absorption, and poor low temperature characteristics, so it needs to be improved urgently. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the technical defects of the background technology, and provide a low-temperature-resistant low-water-absorbing modified nylon m...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L23/06C08L23/12C08L73/00C08K5/20C08K5/526
CPCC08L77/06C08L2205/035C08L2205/025C08L23/06C08L23/12C08L73/00C08K5/20C08K5/526
Inventor 王旭华张友强姚立凯王宝生王强王存铎佘进娟王鑫淼诸葛炯
Owner SHANDONG NON METALLIC MATERIAL RES INST
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