Bio-based long-carbon-chain transparent nylon and synthesis method thereof

Abstract

The invention discloses bio-based long-carbon-chain transparent nylon and a synthesis method thereof. The bio-based long-carbon-chain 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 long-carbon-chain 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 long-carbon-chain 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 long carbon chain transparent nylon and a synthesis method thereof. Background technique

[0002] Transparent polyamide (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.). [0...

Examples

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 synthesis method of bio-based long carbon chain transparent nylon, comprising the following steps:

[0087] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 108.0g (0.65mol) isophthalic acid, 51.1g (0.35mol) adipic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 8% (26.5g) of the total weight of monomer 1, the long carbon chain carboxylic acid calcium salt of 0.3% (1.0g), the benzoic acid of 2% (6.6g), 0.3% (1.0g) 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 re...

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 synthesis method of bio-based long carbon chain transparent nylon, comprising the following steps:

[0092] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 149.5g (0.9mol) isophthalic acid, 14.6g (0.1mol) adipic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 2% (6.7g) of monomer 1 gross weight, the long carbon chain carboxylic acid 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 reac...

technical field

[0001] The invention relates to the field of materials, in particular to a bio-based long carbon chain transparent nylon and a synthesis method thereof. Background technique

[0002] Transparent polyamide (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.). [0...

Examples

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 synthesis method of bio-based long carbon chain transparent nylon, comprising the following steps:

[0087] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 108.0g (0.65mol) isophthalic acid, 51.1g (0.35mol) adipic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 8% (26.5g) of the total weight of monomer 1, the long carbon chain carboxylic acid calcium salt of 0.3% (1.0g), the benzoic acid of 2% (6.6g), 0.3% (1.0g) 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 re...

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 synthesis method of bio-based long carbon chain transparent nylon, comprising the following steps:

[0092] (1) Vacuum-dried monomer 1: 172.3g (1mol) decanediamine, 149.5g (0.9mol) isophthalic acid, 14.6g (0.1mol) adipic acid were added to the stirred polymerization reactor, Add simultaneously the polyester amide of 2% (6.7g) of monomer 1 gross weight, the long carbon chain carboxylic acid 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 reac...

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