Unlock instant, AI-driven research and patent intelligence for your innovation.

High-temperature resistant nylon and nylon composite material with good fracture toughness

A nylon composite material and fracture toughness technology, applied in the field of nylon composite materials, can solve the problems of affecting product life, inaccurate theory, and inability to effectively reflect the long-term working characteristics of materials, so as to maintain long-term working characteristics and life, and improve heat resistance Sexuality and mechanical properties, the effect of reducing water absorption

Inactive Publication Date: 2013-10-23
KINGFA SCI & TECH CO LTD +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For impact resistance, most materials currently only consider the performance data of impact strength, but this cannot effectively reflect the long-term working characteristics of the material, because it is difficult to avoid cracks in the product, which will affect the life of the product
[0011] Toughness is an important property of plastics. The total energy of material impact damage is the energy consumption of the three parts of material crack initiation, growth and fracture. However, only using the total impact energy as a characterization of toughness is theoretically not accurate enough. It often cannot Reflects the initial failure energy of the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-temperature resistant nylon and nylon composite material with good fracture toughness
  • High-temperature resistant nylon and nylon composite material with good fracture toughness
  • High-temperature resistant nylon and nylon composite material with good fracture toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A preparation method of high temperature resistant nylon, comprising the following steps:

[0067] (1) 133 g (0.8 mol) of terephthalic acid, 43.2 g of 2,6-naphthalenedicarboxylic acid (0.2 mol), 116.2 g (1 mol) of 1,6-hexanediamine, 3.6 g (0.03 mol) of of benzoic acid, 1.06 g of sodium hypophosphite monohydrate (0.01 mol), and 110 g of water were added to a 1-liter autoclave and purged with nitrogen. Heat for 2 hours. Its internal temperature reached 260°C. Under this condition, the compound was reacted for 1 hour to obtain a prepolymer. During the reaction, the autoclave was closed and stirring was continued.

[0068] (2) The prepolymer obtained in the step (1) was dried at 120° C. in a nitrogen atmosphere to form a powder.

[0069] (3) 250 g of powdered prepolymer was weighed into a 1-liter round-bottomed flask, and purged with nitrogen. Nitrogen gas was introduced at a flow rate of 300 ml / min, stirring and heating were performed, and the internal temperature rea...

Embodiment 2

[0075] A preparation method of high temperature resistant nylon, comprising the following steps:

[0076] (1) 146.2 g (0.88 mol) of terephthalic acid, 25.9 g of 2,6-naphthalenedicarboxylic acid (0.12 mol), 118.5 g (1.02 mol) of 1,6-hexanediamine, 2.4 g (0.02 mol) of of benzoic acid, 1.06 g of sodium hypophosphite monohydrate (0.01 mol), and 110 g of water were added to a 1-liter autoclave and purged with nitrogen. Heat for 1.5 hours. Its internal temperature reached 280°C. Under this condition, the compound was reacted for 1.5 hours to obtain a prepolymer. During the reaction, the autoclave was closed and stirring was continued.

[0077] (2) The prepolymer obtained in the step (1) was dried at 120° C. in a nitrogen atmosphere to form a powder.

[0078] (3) 250 g of powdered prepolymer was weighed into a 1-liter round-bottomed flask, and purged with nitrogen. Nitrogen gas was introduced at a flow rate of 300 ml / min, stirring and heating were performed, and the internal tem...

Embodiment 3

[0083] A preparation method of high temperature resistant nylon, comprising the following steps:

[0084] (1) 157.8 g (0.95 mol) of terephthalic acid, 10.8 g (0.05 mol) of 1,4-naphthalenedicarboxylic acid, 174 g (1.01 mol) of 1,10-decanediamine, 4.8 g (0.04 mol) of Benzoic acid, 2.1 g of sodium hypophosphite monohydrate (0.02 mol) and 150 g of water were added to a 1 liter autoclave and purged with nitrogen. Heat for 2 hours. Its internal temperature reached 270°C. Under this condition, the compound was reacted for 2 hours to obtain a prepolymer. During the reaction, the autoclave was closed and stirring was continued.

[0085] (2) The prepolymer obtained in the step (1) was dried at 120° C. in a nitrogen atmosphere to form a powder.

[0086](3) 250 g of powdered prepolymer was weighed into a 1-liter round-bottomed flask, and purged with nitrogen. Nitrogen gas was introduced at a flow rate of 300 ml / min, stirring and heating were performed, and the internal temperature re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses high-temperature resistant nylon and a nylon composite material with good fracture toughness. The high-temperature resistant nylon is prepared from 100 parts of aromatic dicarboxylic acid, 100 to 102 parts of aliphatic diamine, 2 to 4 parts of end capping agent and 1 to 2 parts of phosphorus-containing catalyst; the aromatic dicarboxylic acid consists of 80 to 95 percent of terephthalic acid and 5 to 20 percent of naphthalic acid; and the nylon composite material is prepared from 70 to 85 parts of high-temperature resistant nylon, 15 to 25 parts of ethylene-octene copolymer and 0.5 to 13 parts of aid. By optimizing the ratio of the terephthalic acid to the naphthalic acid in the nylon synthesis process and optimizing the formula content of an elastomer in the nylon modification process, the modified nylon material with high initial impact failure energy (namely J criticality) is prepared, and the long-term working characteristics and the service life of the material can be effectively kept.

Description

technical field [0001] The invention belongs to the technical field of modified nylon, in particular to a high temperature resistant nylon and a nylon composite material with good fracture toughness. Background technique [0002] Aliphatic polyamides such as nylon 6, nylon 66, have excellent mechanical strength, heat resistance, chemical resistance, wear resistance and self-lubrication, and low coefficient of friction, their applications include electronic appliances, automotive parts, Furniture, building materials and fibers have become one of the most important engineering plastics. [0003] Semi-aromatic polyamide is a polyamide resin prepared by the polycondensation reaction of diamine or dicarboxylic acid with aromatic ring and aliphatic dicarboxylic acid or diamine, which is one of aromatic polyamides. Due to the introduction of aromatic rings into the main chain of polyamide molecules, the heat resistance and mechanical properties are improved, the water absorption r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28C08L77/06C08L23/08
Inventor 王鹏袁绍彦刘奇祥曾祥斌叶丹滢饶先花
Owner KINGFA SCI & TECH CO LTD