KR20130057284A - Wholly aromatic polyester amide copolymer resin, fiber having the copolymer resin, fabrics having the fiber, and blade having the fabrics - Google Patents

Abstract

PURPOSE: A wholly aromatic polyester amide copolymer resin is provided to improve elasticity and strength, thereby having excellent physical properties, and to be used in a blade. CONSTITUTION: A wholly aromatic polyester amide copolymer resin comprises a repeating unit A derived from a hydroxybenzoic acid-based compound; a repeating unit B derived from a hydroxy naphthoic acid compound; and a repeating unit C derived from an aminobenzoic acid-based compound. The amount of the repeating unit A and B are respectively 50-80 parts by mole and 20-50 parts by mole, based on 100.0 parts by weight of the total weight of the repeating unit A and repeating unit B. The amount of the repeating unit C is 1-10 parts by weight based on 100.0 parts by weight of the total weight of the repeating unit A and repeating unit B.

Description

A wholly aromatic polyester amide copolymer resin, a fiber comprising the wholly aromatic polyester amide copolymer resin, a fabric comprising the fiber, and a blade comprising the fabric (Wholly aromatic polyester amide copolymer resin, fiber having the copolymer resin , fabrics having the fiber, and blade having the fabrics}

Disclosed are a wholly aromatic polyester amide copolymer resin, a fiber comprising the wholly aromatic polyester amide copolymer resin, a fabric comprising the fiber, and a blade comprising the fabric.

Specifically, a wholly aromatic polyester amide copolymer resin having improved elasticity and strength, a high strength and high elastic fiber including the wholly aromatic polyester amide copolymer resin, and a fabric having light weight and improved strength and elasticity including the fiber , And a lightweight and highly elastic blade comprising the fabric.

Wind power generation is a power generation method that consumes less energy and does not cause environmental pollution. Various wind power generation facilities, both large and small, are being developed.

In such wind power generation, blade-shaped blades are used to convert wind energy into electrical energy. Glass fabrics are widely used as the blades for wind power generation, but have a problem in that weight reduction is difficult due to material characteristics. Part of the carbon fabric is employed to reduce the weight, but the carbon fabric is an expensive material, which acts as a factor that hinders the economics of wind power generation.

Therefore, it is necessary to develop a lighter and cheaper material for adopting the blade.

An embodiment of the present invention provides a repeating unit (A) derived from a hydroxy benzoic acid compound, a repeating unit (B) derived from a hydroxy naphthoic acid compound, and a repeating unit (C) derived from an amino benzoic acid compound. It provides the wholly aromatic polyester amide copolymer resin containing in a predetermined ratio.

Another embodiment of the present invention provides a fiber comprising the wholly aromatic polyester amide copolymer resin.

Yet another embodiment of the present invention provides a fabric comprising the fiber and a blade having the fabric.

According to an aspect of the present invention,

Repeating unit (A) derived from a hydroxy benzoic acid compound;

Repeating units (B) derived from hydroxy naphthoic acid compounds; And

A repeating unit (C) derived from an amino benzoic acid compound,

The content of the repeating unit (A) is 50 to 80 mol parts, the content of the repeating unit (B) is 20 to 50 mol parts, based on 100 mol parts in total of the repeating unit (A) and the repeating unit (B),

It is to provide a wholly aromatic polyester amide copolymer resin having a content of the repeating unit (C) is 1 to 10 mol parts based on 100 mol parts of the total of the repeating unit (A) and the repeating unit (B).

Another aspect of the present invention is to provide a fiber comprising the wholly aromatic polyester amide copolymer.

Another aspect of the present invention is to provide a fabric comprising wholly aromatic polyester amide copolymer fibers.

Another aspect of the invention is to provide a blade having a wholly aromatic polyester amide copolymer fabric.

According to one embodiment of the present invention, an wholly aromatic polyester amide copolymer resin may be provided, and by including the wholly aromatic polyester amide copolymer resin, a fiber having high elasticity and high strength while having general chemical resistance and flame retardancy is provided. It is possible to provide a fabric employing the same and a blade provided with the fabric accordingly.

1 shows a fabric composed of wholly aromatic polyester amide copolymer fibers according to one embodiment of the invention.
2 shows a wind generator with a blade made of a wholly aromatic polyester amide copolymer fabric according to one embodiment of the invention.

Hereinafter, a wholly aromatic polyester amide copolymer resin, a fiber including the wholly aromatic polyester amide copolymer resin, a fabric including the fiber and a blade including the fabric will be described in detail according to an embodiment of the present invention. .

According to an aspect of the present invention,

Repeating unit (A) derived from a hydroxy benzoic acid compound;

Repeating units (B) derived from hydroxy naphthoic acid compounds; And

A repeating unit (C) derived from an amino benzoic acid compound,

The content of the repeating unit (A) is 50 to 80 mol parts, the content of the repeating unit (B) is 20 to 50 mol parts, based on 100 mol parts in total of the repeating unit (A) and the repeating unit (B),

It provides the wholly aromatic polyester amide copolymer resin whose content of the repeating unit (C) is 1 to 10 mol parts based on 100 mol parts of the total of the repeating unit (A) and the repeating unit (B).

The hydroxy benzoic acid-based compound may have a hydroxy group in the o-, m- or p- position of benzoic acid, and may exemplify p-hydroxy benzoic acid and the like.

The hydroxy naphthoic acid compound refers to an aromatic compound in which a hydrogen atom is substituted with a hydroxy group in naphthoic acid, and 6-hydroxy-2-naphthoic acid, 5-hydroxy-2-naphthoic acid, and the like. Can be illustrated.

The amino benzoic acid compound refers to an aromatic compound in which a hydrogen atom is substituted with an amino group in a benzoic acid compound, and may have an amino group at an o-, m- or p- position, and exemplify p-amino benzoic acid.

One or more hydrogen atoms present in the hydroxy benzoic acid-based compound, the hydroxy naphthoic acid-based compound, or the amino benzoic acid-based compound may be substituted with various substituents, for example, a halogen atom, a nitro group, a cyano group, Substituted or unsubstituted C ₁ -C ₂₀ alkyl group, substituted or unsubstituted C ₁ -C ₂₀ alkoxy group, substituted or unsubstituted C ₂ -C ₂₀ alkenyl group, substituted or unsubstituted C ₂ -C ₂₀ alkynyl group , Substituted or unsubstituted C ₁ -C ₂₀ heteroalkyl group, substituted or unsubstituted C ₆ -C ₃₀ aryl group, substituted or unsubstituted C ₇ -C ₃₀ arylalkyl group, substituted or unsubstituted C ₅ -C ₃₀ It may be substituted with a heteroaryl group, a substituted or unsubstituted C ₅ -C ₃₀ cycloalkyl group, a substituted or unsubstituted C ₃ -C ₃₀ heterocycloalkyl group, or a substituted or unsubstituted C ₃ -C ₃₀ heteroarylalkyl group.

As used herein, an "alkyl group" is a straight or branched chain having 1 to 20 carbon atoms, or 1 to 10 carbon atoms, or 1 to 5 carbon atoms, methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, Examples include pentyl, iso-amyl, hexyl and the like. One or more hydrogen atoms included in the alkyl group may be substituted with other substituents. Such substituents may be appropriately determined and introduced by those skilled in the art according to a use and a case, but non-limiting examples include C ₁ -C ₁₀ alkyl groups. , C ₂ -C ₁₀ alkenyl group, C ₂ -C ₁₀ alkynyl group, C ₆ -C ₁₂ aryl group, C ₂ -C ₁₂ heteroaryl group, C ₆ -C ₁₂ arylalkyl group, halogen atom, a cyano group, there may be mentioned an amino group, an amidino group, a nitro group, an amide group, a carbonyl group, a hydroxy group, a sulfonyl group, a carbamate group, an alkoxy group such as a C ₁ -C _10.

As used herein, "alkenyl group" or "alkynyl group" means one or more carbon double bonds or triple bonds in the middle or the end of an alkyl group as defined above, and examples thereof include ethylene, Propylene, butylene, hexylene, acetylene and the like. At least one hydrogen atom of the alkenyl group or alkynyl group may be substituted with the same substituent as the alkyl group.

As used herein, "heteroalkyl group" means that at least one of carbon atoms in the main chain of the alkyl group, preferably 1 to 5 carbon atoms is substituted with a hetero atom such as an oxygen atom, a sulfur atom, a nitrogen atom, a person atom, etc. At least one hydrogen atom of the heteroalkyl group may be substituted with the same substituent as in the alkyl group.

As used herein, "aryl group" means a carbocycle aromatic system comprising at least one aromatic ring having 6 to 30 carbon atoms, which rings may be attached or fused together in a pendant manner. Specific examples of such an aryl group include aromatic groups such as phenyl, naphthyl, tetrahydronaphthyl and the like. At least one hydrogen atom in each of these aryl groups may be substituted with the same substituent as the alkyl group.

As used herein, "arylalkyl group" means that some of the hydrogen atoms in the alkyl group as defined above are substituted with the aryl group. For example benzyl, phenylethyl and the like. At least one hydrogen atom of the arylalkyl group may be substituted with the same substituent as in the alkyl group.

As used herein, "cycloalkyl group" means a monovalent monocyclic system having 5 to 30 carbon atoms, and "heterocycloalkyl group" means 1, 2 or 3 heteroatoms selected from N, O, P or S. It refers to a monovalent monocyclic system having 5 to 30 ring atoms, wherein the remaining ring atoms are C. At least one hydrogen atom of such a cycloalkyl group or a heterocycloalkyl group may be substituted with the same substituent as in the case of the alkyl group, respectively.

As used herein, a "heteroaryl group" means a ring aromatic system having 5 to 30 ring atoms containing 1, 2 or 3 heteroatoms selected from N, O, P or S, and the remaining ring atoms being C. The rings may be attached or fused together in a pendant manner. At least one hydrogen atom in the heteroaryl group may be substituted with the same substituent as in the alkyl group.

As used herein, "heteroarylalkyl group" means that a part of the hydrogen atoms of the alkyl group as defined above is substituted with the heteroaryl group, wherein at least one hydrogen atom of the heteroarylalkyl group is the same as that of the alkyl group, respectively. Substitutable with a substituent.

As used herein, "alkoxy group" refers to a radical-O-alkyl, wherein alkyl is as defined above. Specific examples include methoxy, ethoxy, propoxy, isobutyloxy, sec-butyloxy, pentyloxy, iso-amyloxy, hexyloxy and the like. At least one hydrogen atom of such alkoxy group may be substituted with the same substituent as in the alkyl group.

Each repeating unit derived from the hydroxy benzoic acid-based compound, the hydroxy naphthoic acid-based compound and the amino benzoic acid-based compound is autopolymerized or polymerized with another monomer or polymer to form a repeating unit structure. it means.

The repeating unit (A) derived from the hydroxy benzoic acid compound in the wholly aromatic polyester amide copolymer resin is used to impart the same physical properties to the copolymer resin, and the repeating unit (A) and the repeating unit ( It is used in an amount of 50 to 80 mol parts relative to 100 mol parts in total of B), for example, a content of 60 to 75 mol parts may be used. If it is out of the content, there is a fear of strength degradation, post-processing is impossible.

In the wholly aromatic polyester amide copolymer resin, the repeating unit (B) derived from the hydroxy naphthoic acid compound is used to impart physical properties such as heat resistance to the copolymer resin, and the repeating unit (A) And it is used in an amount of 20 to 50 mole parts relative to the total 100 moles of the repeating unit (B), for example 25 to 40 mole parts may be used. If it is out of the content there is a fear that the heat resistance is lowered and post-processing is impossible.

In the wholly aromatic polyester amide copolymer resin, the repeating unit (C) derived from the amino benzoic acid compound is used to impart elasticity-like properties to the copolymer resin, and the repeating unit (A) and the repeating unit It can be used in an amount of 1 to 10 mol parts with respect to 100 mol parts in total of (B), for example, a content of 2 to 9 mol parts can be used. If it is out of the content there is a fear of elasticity degradation and impossibility of polymerization.

The wholly aromatic polyester amide copolymer resin has a weight average molecular weight of 1,000 to 100,000, the glass transition temperature is 200 ℃ to 300 ℃, the melting temperature may have a value in the range of 250 ℃ to 400 ℃.

In addition, the above-mentioned wholly aromatic polyester amide copolymer resin exhibits the desired physical properties by including each repeating unit in a predetermined mole fraction. In particular, the physical properties of each repeating unit is combined to have the characteristics of high elasticity and high strength while having general chemical resistance and flame retardancy.

The wholly aromatic polyester amide copolymer resin as described above can be prepared by the following method. That is, the wholly aromatic polyester amide copolymer resin is a hydroxy benzoic acid compound corresponding to the repeating unit (A), a hydroxy naphthoic acid compound corresponding to the repeating unit (B), and the repeating unit ( Hydroxy and / or amino groups present in the amino benzoic acid compound corresponding to C) are acylated with acid anhydride to obtain acylates, and these acylates are transesterified with the carboxyl groups present in the compounds and It can be prepared by a method of melt polymerization by amide exchange.

In the acylation reaction, the addition amount of the acid anhydride may be added in an excessive amount compared to the hydroxy group and the amino group, and may be used in an amount of 1.0 times to 1.2 times the equivalent, for example, 1.04 times to 1.07 times the equivalent of the hydroxy group and the amino group. have. When the amount of the acid anhydride added is within the above range, the coloring of the resulting wholly aromatic polyester amide copolymer resin is reduced, and the amount of generation of phenol gas does not occur in the resulting wholly aromatic polyester amide copolymer resin. Will also be less. This acylation reaction may be performed for 30 minutes to 8 hours, for example, for 2 hours to 4 hours at 140 ℃ to 160 ℃ in the temperature range of 130 ℃ to 170 ℃.

The acid anhydride used in the acylation reaction may include acetic anhydride, propionic anhydride, isobutyric anhydride, gil acetic anhydride, pivalic anhydride, butyric anhydride, or a combination thereof.

The transesterification and / or amide exchange reaction may be performed at a temperature increase rate of 0.1 ° C./min to 2 ° C./min at 130 ° C. to 400 ° C., for example, at a temperature of 0.3 ° C./min to 1 ° C./min at 140 to 350 ° C. Can be done with

In addition, by-product fatty acid and unreacted anhydride may be discharged out of the reaction system by evaporation or distillation in order to shift the chemical equilibrium and increase the reaction rate during the transesterification reaction and / or amide exchange reaction.

In addition, the acylation reaction, transesterification reaction and amide exchange reaction can proceed in the presence of a catalyst. The catalyst may include magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, potassium acetate, antimony trioxide, N, N-dimethylaminopyridine, N-methylimidazole, or a combination thereof. . The catalyst may be added simultaneously with the monomer when the monomer is added, and acylation reaction and transesterification reaction may occur in the presence of the catalyst.

The condensation polymerization by the transesterification and the amide exchange reaction may be carried out by melt polymerization, or may be carried out using a combination of melt polymerization and solid phase polymerization.

The polymerizer used for the melt polymerization is not particularly limited, and may be a reactor equipped with a stirring apparatus generally used for high viscosity reactions. At this time, the same reactor may be used as the reactor of the acylation process and the polymerizer of the melt polymerization process or different reactors may be used for each process.

The solid phase polymerization may be performed by pulverizing the prepolymer discharged from the melt polymerization process into a flake or powder phase and then proceeding with the polymerization. Such solid phase polymerization may be performed by, for example, heat treatment in a solid state for 1 hour to 30 hours at 200 ° C to 400 ° C in an inert atmosphere such as nitrogen. In addition, the solid phase polymerization may be carried out under stirring or may be carried out in an unstirred state. Moreover, the reactor equipped with the suitable stirring apparatus can also be used together with a melt polymerization tank and a solid state polymerization tank.

The wholly aromatic polyester amide copolymer prepared as described above may have a glass transition temperature of 200 ° C or higher, for example, 200 to 300 ° C, and a melting temperature of 250 ° C to 400 ° C.

The wholly aromatic polyester amide copolymer prepared as described above may be molded after being pelletized by a known method or fibrous by a known method. For example, extrusion processing may be performed at a temperature 5 ° C to 20 ° C higher than the melting temperature of the wholly aromatic polyester amide copolymer to obtain a wholly aromatic polyester amide copolymer resin in a pellet state.

The pelletized wholly aromatic polyester amide copolymer resin may be subjected to fibrous processing at a temperature of 5 ° C to 20 ° C higher than the melting temperature to obtain the copolymer resin in the form of a fibrous structure. The fibrous processing can be used without limitation as long as it is a method known in the art, for example, a method such as melt spinning, wet spinning and dry spinning can be used.

The fibrous structure obtained as described above can be improved in physical properties by further heat treatment. Such heat treatment may heat the fibrous structure at a rate of 1 ° C. to 5 ° C./hour in a temperature range of 150 ° C. to 310 ° C. under an inert atmosphere, and for 0.5 to 20 hours at the final temperature.

 The wholly aromatic polyester amide copolymer fiber subjected to the additional heat treatment as described above has a glass transition temperature of 200 ° C or higher, for example, 200 ° C to 300 ° C, a melting temperature of 250 ° C or higher, for example, 250 ° C to 400 ° C. It has general chemical resistance and flame retardancy, and in particular, has high elasticity and high strength.

The wholly aromatic polyester amide copolymer fiber obtained by the above method can be processed into a woven fabric as shown in Fig. 1 by a conventional weaving method. At this time, as the thickness of the wholly aromatic polyester amide copolymer fiber, the slope may be used 50 denier to 500 denier, weft yarn 75 denier to 750 denier, the thickness of the fabric by varying the thickness and weaving method of the fiber It can be adjusted that the thickness of the fabric can be obtained from 0.1mm to 0.8mm.

The weaving process is a step of weaving the fabric with a wholly aromatic polyester amide copolymer fiber yarn. At this time, the fiber yarn used is preferably made of a plurality of bundles in that it can satisfy the physical properties. Meanwhile, the thickness of the fabric is adjusted according to the use, and weaving is performed. A typical fabric has a thickness of 0.1 to 0.8 mm. At this time, the thickness of the fabric can be adjusted by changing the thickness of the yarn and the organization through deformation of the basic weaving method (e.g. plain weave, twill, runner weave). When the thickness of the fabric is 0.1mm, the thickness of the weave is All of the warp yarns are 50 to 75 denier, and if the thickness of the base fabric is 0.25mm, the warp yarn is 75 denier and the weft yarn may be selected to have any one of 150 denier, 225 denier and 300 denier. . When the thickness of the fabric is 0.5mm, the warp yarn may be 150 denier and the weft yarn may be 500 denier. On the other hand, when weaving considerably thick with a thickness of 1 mm, the warp yarn is 500 denier and the weft yarn is 750 denier. In this case, the thickness of the yarn may be selectively selected and used within the range used as the weft and the warp depending on which method is selected as the weaving method.

The fabric obtained as described above is lightweight, high in strength and elasticity, and can be used as a material for blades, bulletproof materials, aviation materials, and ship materials.

The blade is used in a wind turbine, etc., the wind generator is a device for producing power by rotating the blades in series with the wind using the wind.

Figure 2 shows one embodiment of a wind turbine with a blade of the present invention.

In Fig. 2, a nacelle in which parts such as a post 1 installed on the ground, a blade 2 rotated by the wind, a speed increaser for increasing the rotational force of the blade, and a generator 3a for producing electricity are built-in ( 3) and a yaw device 4 for rotating the nacelle 3 so that the rotational surface of the blade 2 faces the wind when the wind direction is changed, and a wind direction signal for driving the yaw device 4 by sensing the direction of the wind. It is implemented including a wind direction sensor for generating a. By this structure, when the wind direction is changed, the wind direction sensor detects this to generate a wind direction signal, and the wind direction signal causes the yaw device 4 to rotate the nacelle 3 so that the rotating surface of the blade 2 faces the wind direction. When (2) is rotated, the generator 3a is operated to generate power.

Since the blade 2 is organically connected to the generator 3a, the blade 2 overcomes the static frictional force generated by the generator 3a and the static moment of inertia related to the weight of the blade 2 itself so that the blade 2 rotates. shall. Therefore, for this purpose, the blade needs to be lightweight, and as it is exposed to the outside, high strength and elasticity are required.

Fabrics made of wholly aromatic polyester amide copolymer fibers according to the present invention can be usefully used in the wind generator because it satisfies various properties of such blades.

Method for producing the blade (2) using the fabric made of the wholly aromatic polyester amide copolymer fibers can be used without limitation methods known in the art. For example, after the fabric is applied to a mold having a structure bisecting the blades horizontally, an epoxy resin or the like is added thereto to solidify the blades, and the structures may be combined with each other to produce a blade.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1

508.1 g (2.7 mol) of 6-hydroxy-2-naphthoic acid, 68.6 g (0.5 mol) of p-amino benzoic acid and p-hydroxy in a reactor equipped with a stirring device, a nitrogen gas introduction tube, a thermometer and a reflux condenser 939.2 g (6.8 mol) of benzoic acid was added and nitrogen gas was injected to make the internal space of the reactor inactive, and then 1071.9 g (10.5 mol) of acetic anhydride (Ac ₂ O) was further added to the reactor. The reactor temperature was then elevated to 140 ° C. over 1 hour and hydroxyated and amino groups of the monomers were refluxed at this temperature for 2 hours . Subsequently, the reactor temperature was raised to 300 ° C. over 4 hours while removing the acetic acid produced in the acetylation reaction to prepare a wholly aromatic polyester amide copolymer prepolymer by condensation polymerization of the monomers. In addition, acetic acid is further generated as a by-product during the preparation of the prepolymer, which was also continuously removed during the copolymer preparation process together with the acetic acid produced in the acetylation reaction. Next, the prepolymer was recovered from the reactor and cooled and solidified.

Thereafter, the wholly aromatic polyester amide copolymer prepolymer was pulverized to an average particle diameter of 1 mm, and then 1.5 kg of the crushed wholly aromatic liquid crystalline polyester prepolymer was introduced into a rotary kiln reactor having a capacity of 100 liters, and nitrogen was 1 Nm 3 / hour. The whole aromatic polyester amide copolymer was prepared by heating up to 200 degreeC which is a weight loss start temperature over 1 hour, continuing to flow at a flow rate, and then heating up to 320 degreeC over 10 hours and maintaining for 3 hours. Subsequently, the reactor was cooled to room temperature over 1 hour, and then the wholly aromatic liquid crystal polyester copolymer was recovered from the reactor.

After the solid phase reaction was completed, the wholly aromatic polyester amide copolymer was prepared using a twin screw extruder. The wholly aromatic polyester amide copolymer pellet was manufactured by melt-kneading on the temperature of the twin screw extruder on condition of Tm + 15 degreeC of resin. At this time, by-product was applied by vacuum to the twin screw extruder.

Thereafter, the wholly aromatic polyester amide copolymer pellets are manufactured using a melt spinning method to produce fibers as follows. The pellets were melted under a temperature condition of Tm + 15 ° C. and extruded through spinnerets, which were cooled and solidified to obtain a fiber. The thus-obtained wholly aromatic polyester amide copolymer fiber was improved in physical properties by further heat treatment because the stretchability is inferior in the properties of the polymer. The fiber was put in an oven in an inert atmosphere and heated up to 100-300 ° C at a rate of 2 ° C / hour. And finally by maintaining the final temperature for 8 hours to obtain a wholly aromatic polyester amide copolymer fiber with improved physical properties. The additional heat treatment method can be performed continuously as well as the batch type as described above.

Comparative Example 1

Except that the amino benzoic acid was not used in Example 1, the same procedure was followed to prepare a wholly aromatic polyester amide copolymer.

Comparative Example 2

Except for changing the content of amino benzoic acid in Example 1 to 205.7g (1.5mol) to carry out the same process to prepare a wholly aromatic polyester amide copolymer, and then to prepare a fiber yarn.

Comparative Example 3

Commercially available E-glass fiber (Nittobo) was used.

Evaluation example

Evaluation Example 1: Evaluation of Physical Properties of Resin

The glass transition temperature, melting temperature and melt index of each wholly aromatic polyester amide copolymer obtained in Example 1 and Comparative Example 1 were measured and shown in Table 1 below.

division Glass transition temperature (캜) Melting temperature (캜) Melt index Example 1 220 290 40 Comparative Example 1 210 300 100 Comparative Example 2 220 280 15

In Table 1, the glass transition temperature and the melting temperature were measured while increasing the temperature to 20 ℃ / min using DSC, the melt index using a Goettfert's MI-3 with a load of 2.16 kg at Tm + 20 ℃ of the copolymer Measured. The melt index is an index indicating the flowability of the resin.

Referring to Table 1, the glass transition temperature of Comparative Examples 1 and 2 shows the same or less than the level of Example 1. The melting temperature and the melt index are higher or lower than those of Example 1. In the case of the actual polymerization, in the case of Comparative Example 2, the viscosity of the reactant rapidly increased, and thus, normal progress was difficult. As a result, the melt index also showed a very low value. In addition, the melt index values of Comparative Examples 1 and 2 are difficult values for fiber processing, and in fact, complete fibers could not be obtained even during processing.

Evaluation Example 2: Evaluation of Physical Properties of Fibers

Physical properties of the fibers obtained in Example 1 and Comparative Examples 1 and 2 were measured and shown in Table 2 below.

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Remarks Tg (占 폚) 230 235 195 - DSC Tensile modulus
(tensile modulus, GPa) 90 - - 72 Instron
(Instron) Specific tensile modulus
(specific tensile modulus, GPa / (g / dl)) 62 - - 28 Tensile Modulus / Density The tensile strength
(tensile strength, GPa) 2.40 - - 3.40 Instron Tensile strength
(specific tensile strength, GPa / (g / dl)) 1.65 - - 1.30 Tensile Strength / Density Density (g / dl) 1.45 1.45 1.45 2.6

In Table 2, the copolymers obtained in Comparative Examples 1 and 2 were unable to measure a fiber modulus and thus could not measure tensile modulus, tensile strength, or the like.

As can be seen from the results of Table 2, it can be seen that the wholly aromatic polyester amide copolymer fiber of the present invention is superior in strength and elasticity as compared to commercially available E-glass fiber (Comparative Example 3).

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (8)

Repeating unit (A) derived from a hydroxy benzoic acid compound;
Repeating units (B) derived from hydroxy naphthoic acid compounds; And
A repeating unit (C) derived from an amino benzoic acid compound,
The content of the repeating unit (A) is 50 to 80 mol parts, the content of the repeating unit (B) is 20 to 50 mol parts, based on 100 mol parts in total of the repeating unit (A) and the repeating unit (B),
The wholly aromatic polyester amide copolymer resin whose content of the said repeating unit (C) is 1-10 mol parts with respect to a total of 100 mol parts of the said repeating unit (A) and a repeating unit (B). The method of claim 1,
The wholly aromatic polyester amide copolymer resin has a glass transition temperature of 200 ℃ or more, and a wholly aromatic polyester amide copolymer resin having a melting temperature of 250 ℃ to 400 ℃. A wholly aromatic polyester amide copolymer fiber comprising the wholly aromatic polyester amide copolymer resin according to claim 1. An wholly aromatic polyester amide copolymer fabric comprising the wholly aromatic polyester amide copolymer fiber according to claim 3. A wind turbine blade comprising the wholly aromatic polyester amide copolymer fabric of claim 4. Acylating a hydroxy benzoic acid compound, a hydroxy naphthoic acid compound, and an amino benzoic acid compound with an acid anhydride to obtain an acylate; And
Polymerizing the acylate by transesterification or amide exchange; a method of producing a wholly aromatic polyester amide copolymer comprising a. Acylating a hydroxy benzoic acid compound, a hydroxy naphthoic acid compound, and an amino benzoic acid compound with an acid anhydride to obtain an acylate;
Obtaining the wholly aromatic polyester amide copolymer by subjecting the acylate to transesterification or amide exchange; And
Fiberizing the wholly aromatic polyester amide copolymer;
Method for producing a wholly aromatic polyester amide copolymer fiber comprising a. The method of claim 7, wherein
The method of producing a wholly aromatic polyester amide copolymer fiber further comprising the step of further heat-treating the wholly aromatic polyester amide copolymer fiber.

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