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Bio-based transparent nylon and its synthesis method

A synthetic method and a bio-based 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 production processes of solid-phase polymerization, so as to improve the impact strength and antistatic ability, Excellent processability and the effect of reducing the number of steps

Active Publication Date: 2017-06-06
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 complex and complex, requiring high equipment parameters, and the reaction is slow. It is necessary to ensure that the ratio of functional groups is close to 1:1, and vacuum or air flow is required to accelerate the discharge of small molecules of by-products during the viscosity-increasing stage, 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 transparent nylon and its synthesis method
  • Bio-based transparent nylon and its synthesis method
  • Bio-based transparent nylon and its synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0078] The raw material composition and synthetic steps of the polyester amide used in the present embodiment are as follows:

[0079](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;

[0080] (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

[0085] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0086] This embodiment is a synthetic method of bio-based transparent nylon, comprising the following steps:

[0087] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 108.0g (0.65mol) isophthalic acid, 70.8g (0.35mol) sebacic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 8% (28.1g) of the gross weight of monomer 1, the long carbon chain carboxylate calcium salt of 0.3% (1.1g), the benzoic acid of 2% (7.0g), 0.3% (1.1g) N,N`-di(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium for mass transfer and heat transfer; then vacuumize for 5min , 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 t...

Embodiment 3

[0090] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0091] This embodiment is a synthetic method of bio-based transparent nylon, comprising the following steps:

[0092] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 149.5g (0.9mol) isophthalic acid, 20.2g (0.1mol) sebacic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 2% (6.8g) of monomer 1 gross weight, the long carbon chain carboxylate calcium salt of 0.2% (0.7g), the benzoic acid of 0.5% (1.7g), 0.2% (0.7g) N,N`-di(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium for mass transfer and heat transfer; then vacuumize for 5min , pass nitrogen for 5 minutes, and circulate like this for 6 times, so that the reactants are present in the environment under nitrogen protection, and the system pressure in the stirred polymerization reactor is controlled to ...

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Abstract

The invention discloses bio-based transparent nylon and a synthesis method thereof. The bio-based transparent nylon has the structure shown in formula I as described in the description, wherein in the formula I, a is equal to 10-100, b is equal to 10-200, c is equal to 10-100, d is equal to 10-100, and R represents polyesteramide. The bio-based transparent nylon has the advantages that mechanical performance and light transmittance are high, the water absorption rate is low, the machining performance is excellent, biological sources are achieved, and the bio-based transparent nylon can be applied to the fields of surrounding mechanical parts and electrical and mechanical parts of fuel and oil, precision optical instruments, pressure-proof view windows, observation mirrors, special lamp outer covers, food packaging thin films, high-grade sports equipment and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bio-based transparent nylon and a synthesis method thereof. Background technique [0002] Transparent polyamide (that is, transparent nylon) 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; not only excellent transparency (transparency even exceeds PC, close to PMMA), but also resistant to environmental stress cracking, oily solvents, scratches, and Wear and other aspects are superior to general transparent polymer materials (such as PS, PC, PMMA, etc.). [0003] Tran...

Claims

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Application Information

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