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Bio-based long carbon chain transparent polyamide and its synthesis method

A synthesis method and long carbon chain 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 by-product small molecules, and many solid-phase polymerization production processes, so as to improve the notched impact strength and antistatic Ability, excellent processing performance, and the effect of reducing the number of processes

Active Publication Date: 2017-10-13
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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  • Bio-based long carbon chain transparent polyamide and its synthesis method
  • Bio-based long carbon chain transparent polyamide and its synthesis method
  • Bio-based long carbon chain transparent polyamide and its synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0077] The raw material composition and synthetic steps of the polyester amide used in the present embodiment are as follows:

[0078](1) Vacuum-dried monomer 2: 1006.6g (5mol) 11-aminoundecanoic acid, 456.6g (4mol) 6-caprolactone, 270.3g (1.25mol) 2,2'-(1,3 -Phenylene)-bisoxazoline was added to the stirred polymerization reactor, and tetrabutyl titanate (17.3 g) of 1% of the total weight of monomer 2 was added as a catalyst, and 500 mL of water was added as a mass transfer and heat transfer Then vacuumize for 5 minutes, pass nitrogen for 5 minutes, and circulate like this for 6 times, so that the reactant exists in the environment under nitrogen protection, and the system pressure in the stirred polymerization reactor is controlled to be 0.2MPa;

[0079] (2) within 2.5 hours, heat the stirred polymerization reactor to 250°C at a uniform speed, and adjust the stirring speed of the stirred polymerization reactor to 40r / min, wherein, when the temperature of the stirred polymeriz...

Embodiment 2

[0084] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0085] In this embodiment, a synthetic method of bio-based long carbon chain transparent polyamide comprises the following steps:

[0086] (1) Add monomer 1 after vacuum drying: 172.3g (1mol) decanediamine, 166.1g (1mol) isophthalic acid, 60.4g (0.3mol) 11-aminoundecanoic acid to the stirred polymerization reactor In, add the polyester amide of 8% (31.9g) of monomer 1 total weight simultaneously, the long carbon chain carboxylic acid calcium salt of 0.3% (1.2g), the benzoic acid of 2% (8.0g), 0.3% (1.2g) g) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium of mass transfer and heat transfer; then pump Vacuum for 5 minutes, nitrogen for 5 minutes, and so on for 6 times, so that the reactants exist in the environment under the protection of nitrogen, and the system pressure in the stirred polymerizatio...

Embodiment 3

[0089] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0090] In this embodiment, a synthetic method of bio-based long carbon chain transparent polyamide comprises the following steps:

[0091] (1) Add monomer 1 after vacuum drying: 172.3g (1mol) decanediamine, 166.1g (1mol) isophthalic acid, 20.1g (0.1mol) 11-aminoundecanoic acid to the stirred polymerization reactor In, add the polyester amide of 2% (7.2g) of monomer 1 gross weight simultaneously, the long carbon chain carboxylate calcium salt of 0.2% (0.7g), the benzoic acid of 0.5% (1.8g), 0.2% (0.7g) g) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium of mass transfer and heat transfer; then pump Vacuum for 5 minutes, nitrogen for 5 minutes, and so on for 6 times, so that the reactants exist in the environment under the protection of nitrogen, and the system pressure in the stirred polymerization r...

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Abstract

The invention discloses bio-based long carbon chain transparent polyamide and a synthetic method thereof. The bio-based long carbon chain transparent polyamide adopts the structure in the formula I (shown in the description), wherein a=10-200, b=10-200, c=10-100 and R is polyesteramide. The bio-based long carbon chain transparent polyamide is relatively high in mechanical property and light transmittance, low in water absorption, and excellent in processability, has the biogenetic derivation property, and can be applied to the fields of fuel and oil surrounding mechanical parts and electric mechanical parts, precise optical instruments, pressure-resistant windows, observation mirrors, special lamp shades, food packaging films, high-grade sport instruments and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bio-based long carbon chain transparent polyamide and a synthesis method thereof. Background technique [0002] Transparent polyamide is a polymer material with excellent comprehensive properties. It not only has the advantages of high mechanical strength, good thermal stability, and excellent corrosion resistance, but also has the advantages of easy molding and processing, dimensional stability, small 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 exceeds PC, close to PMMA), but also resistance to environmental stress cracking, oily solvents, scratch resistance, wear resistance It is superior to general transparent polymer materials (such as PS, PC, PMMA, etc.) in terms of dam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28C08G69/44C08K5/3435
CPCC08G69/265C08G69/28C08G69/44C08K5/3435
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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