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Semi-aromatic transparent polyamide and synthesis method thereof

A semi-aromatic and synthetic method technology, applied in the field of materials, can solve the problems of restricting the large-scale promotion of solid-phase polymerization, accelerating the discharge of small molecules of by-products, and many solid-phase polymerization production processes, so as to improve the notched impact strength and antistatic ability, reduce crystallization ability, reduce the effect of the process

Active Publication Date: 2016-04-13
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since solid-phase polymerization is generally carried out at 15-30°C below the melting point of the prepolymer, the reaction rate is slow and the reaction time is long, and the production process of solid-phase polymerization is complicated and the process is complicated. The requirements for equipment parameters are high, and the reaction is slow. It is necessary to ensure that the ratio of functional groups is close to 1:1, and the viscosity-increasing stage requires vacuum or air flow to accelerate the discharge of small molecules of by-products, thereby increasing the molecular weight of polycondensation products. Therefore, the above conditions limit the large-scale promotion of solid-phase polymerization

Method used

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  • Semi-aromatic transparent polyamide and synthesis method thereof
  • Semi-aromatic transparent polyamide and synthesis method thereof
  • Semi-aromatic transparent polyamide and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The raw material composition and synthesis steps of the polyester amide used in this embodiment are as follows:

[0080] (1) The monomer after vacuum drying 2: 1006.6g (5mol) 11-aminoundecanoic acid, 456.6g (4mol) 6-caprolactone, 270.3g (1.25mol) 2,2'-(1,3 -Phenylene)-Dioxazoline was added to the stirred polymerization reactor, while adding 1% of the total weight of monomer 2 to tetrabutyl titanate (17.3g) as a catalyst, and 500mL of water as mass transfer and heat transfer The medium; then vacuum for 5min, nitrogen gas for 5min, so cycle 6 times, so that the reactants exist in the environment under the protection of nitrogen, control the system pressure in the stirred polymerization reactor to 0.2MPa;

[0081] (2) In 2.5 hours, heat the agitated polymerization reactor to 250℃ in an airtight manner and adjust the stirring speed of the agitated polymerization reactor to 40r / min. When the temperature of the agitated polymerization reactor reaches 210℃, vent gas To 1.6MPa, and...

Embodiment 2

[0086] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0087] The method for synthesizing semi-aromatic transparent polyamide in this embodiment includes the following steps:

[0088] (1) Add the vacuum-dried monomer 1:116.2g (1mol) hexamethylenediamine, 99.7g (0.6mol) isophthalic acid, and 66.5g (0.4mol) terephthalic acid into the stirred polymerization reactor , While adding 8% (22.6g) of the total weight of monomer 1 polyester amide, 0.3% (0.8g) of long-carbon chain carboxylic acid calcium salt, 2% (5.6g) of benzoic acid, 0.3% (0.8g) ) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the mass and heat transfer medium; then vacuum 5min, bubbling nitrogen for 5min, circulate like this 6 times, make the reactant exist in the environment under the protection of nitrogen, and control the system pressure in the stirred polymerization reactor to 0.2MPa;

[0089] (2) Within ...

Embodiment 3

[0091] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0092] The method for synthesizing semi-aromatic transparent polyamide in this embodiment includes the following steps:

[0093] (1) Add the vacuum-dried monomer 1:116.2g (1mol) hexamethylenediamine, 149.5g (0.9mol) isophthalic acid, and 16.6g (0.1mol) terephthalic acid into the stirred polymerization reactor , And add 2% (5.6g) polyester amide, 0.2% (0.6g) long carbon chain carboxylic acid calcium salt, 0.5% (1.4g) benzoic acid, 0.2% (0.6g) ) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the mass and heat transfer medium; then vacuum 5min, bubbling nitrogen for 5min, circulate 6 times in this way, make the reactant exist in the environment under the protection of nitrogen, control the system pressure in the stirred polymerization reactor to 0.3MPa;

[0094] (2) In 3.5 hours, heat the agitated polymerization reac...

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Abstract

The invention discloses a semi-aromatic transparent polyamide and a synthesis method thereof. The semi-aromatic transparent polyamide has a structure shown in a formula I, wherein a equals to 10-100, b equals to 10-200, c equals to 10-100, d equals to 10-100, and R is a polyester amide. The semi-aromatic transparent polyamide has high mechanical properties and transmittance, low water absorption and excellent processing performance, can be applied in the mechanical parts around the fuel oil, electrical and mechanical components, precision optical instruments, pressure-resistant windows, viewers, special light fixture housing, food packaging films, and high-end sports equipment.

Description

Technical field [0001] The invention relates to the field of materials, in particular to a semi-aromatic transparent polyamide and a synthesis method thereof. Background technique [0002] Transparent polyamide is a polymer material with excellent comprehensive performance. It not only has the advantages of high mechanical strength, good thermal stability, excellent corrosion resistance, etc., but also has easy forming and processing, dimensional stability, low linear expansion coefficient, high cost performance, excellent electrical insulation and aging resistance, non-toxic, Odorless, easy to form alloys with other amorphous or semi-crystalline polyamides, etc.; not only excellent transparency (transparency even more than PC, close to PMMA), but also resistant to environmental stress cracking, oil solvent, scratch resistance, wear resistance It is superior to common transparent polymer materials (such as PS, PC, PMMA, etc.) in terms of damage. Transparent polyamide has now be...

Claims

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Application Information

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IPC IPC(8): C08G69/44
CPCC08G69/44
Inventor 胡国胜张静婷王忠强石哲平师文博方春晖刘冰肖许和伟
Owner ZHONGBEI UNIV
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