CN109021218A - A kind of high barrier degradable copolyester material and preparation method thereof - Google Patents
A kind of high barrier degradable copolyester material and preparation method thereof Download PDFInfo
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- CN109021218A CN109021218A CN201810639180.6A CN201810639180A CN109021218A CN 109021218 A CN109021218 A CN 109021218A CN 201810639180 A CN201810639180 A CN 201810639180A CN 109021218 A CN109021218 A CN 109021218A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6854—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/6856—Dicarboxylic acids and dihydroxy compounds
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Abstract
The present invention provides a kind of preparation methods of high barrier degradable copolyester material, first synthesizing imide monomer, then carry out copolyreaction and obtain copolyester material dant monomer and adipic acid, butanediol.The dant monomer that the present invention is prepared has heteroaromatic binary acid structure, had not only contained aromatic ring structure but also had contained layer structure；Aromatic ring structure can be improved integral strength, impact property and heat resistance of material etc., and the fragrant hybrid structure of stratiform then takes blocking effect to vapor, for improving the whole barrier property of material；The aliphatic polyester that esterification obtains can be degradable under field conditions (factors), is able to drive the degradation process of heteroaromatic copolyesters, realizes quick, totally biodegradable.Meanwhile preparation method simple process provided by the invention, production cost are low, solve the problems, such as current degradation material production technology complexity and high production cost.
Description
Technical field
The present invention relates to totally biodegradable field of material technology more particularly to a kind of high barrier degradable copolyesters
Material and preparation method thereof.
Background technique
Barrier material is widely used to thin-film material, packaging because having low permeability, barrier property and chemical resistance
The fields such as material and fire-fighting equipment.However, with the popularization and use of barrier material, although it can satisfy life in terms of barrier property
Production requirement living, but it deposits non-degradable, the disadvantages of rate of recovery is not high after use, problem of environmental pollution day resulting from
It is increasingly acute, do not meet environmentally protective theory.
The effective way that degradation material is solution environmental problem is greatly developed, however according to existing degradation material
Result of study shows that degradation material is generally esterification material, and generally existing barrier property is poor, hydrolysis resistance is weak, mechanical property
The defects of not high, thus exist when substituting existing conventional plastic and use defect, we must improve its barrier property, Cai Nengman
Use demand in sufficient field.Improved method more typical at present are as follows: first is that being squeezed on the basis of degradation material by screw rod
Experiment carries out mixed and modified technology out, and added material is generally PPC, mica powder, minerals etc.；Second is that being obtained by compound experiment
High obstructing performance product.But both methods still has defect, mixed and modified technology is for when improving barrier property, needing pair
Degradation material carries out melting extrusion experiment, and as the auxiliary agent of addition changes, process conditions especially temperature can also change,
For degradative plastics, this can make degradative plastics so that its performance is changed because of secondary extrusion, mechanical properties decrease, film property
It can be deteriorated, and be likely to occur Partial digestion, and influence to use；The auxiliary agent of addition also will affect the degradation during materials'use
Rate and palliating degradation degree, so that the whole degradation property to material has an impact.And high barrier is prepared by chemical synthesis
Degradation material, one side synthesis technology is complicated, and product is not easily purified, and molecular weight is uneven；Another aspect synthesis cost is higher,
Cause its whole production cost higher, there may be obstructions when industrialization promotion.
In conclusion provide it is a kind of with good barrier property, to satisfy the use demand, and use rear degradable material
It is very necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of with high barrier and degradable copolyester material, overcomes the prior art
Present in the barrier property of degradation material and the problem of degradation property difference.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of preparation methods of high barrier degradable copolyester material, comprising the following steps:
(1) p-aminobenzoic acid, trimellitic anhydride and basic solvent are mixed, in 20~30 DEG C of progress imidization reactions
8~10h obtains imidization reaction system；
(2) the imidization reaction system is mixed with benzene kind solvent, is dehydrated at 120~175 DEG C, until water yield
Reach theoretical water number out, obtains dant monomer；
(3) dant monomer, adipic acid and dihydric alcohol are mixed, is esterified under chain extender and catalyst action
Reaction, obtains esterification products system；
(4) under polycondensation antioxidant and polycondensation catalyst effect, the esterification products system is subjected to polycondensation reaction, is obtained
High barrier degradable copolyester material.
Preferably, the molar ratio of p-aminobenzoic acid and trimellitic anhydride is 1:0.8~1.2 in the step (1).
Preferably, the molar ratio of dant monomer, adipic acid and dihydric alcohol is 0.2~0.45:0.8 in the step (3)
~0.55:1.5~2.
Preferably, the chain extender in the step (3) is bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin
Composition, the mass ratio of the bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin are 18~48:5~15:55~70.
Preferably, the catalyst in the step (3) is composition, antimony oxide and the dioxy of antimony acetate and zinc acetate
Change the butanediol compound or germanium oxide of titanium.
Preferably, the additional amount of the chain extender accounts for 1~the 2 ‰ of the high barrier degradable copolyester quality of materials；
The additional amount of the catalyst accounts for 0.3~the 0.5 ‰ of the high barrier degradable copolyester quality of materials.
Preferably, the esterification in the step (3) the following steps are included:
Dant monomer, adipic acid and dihydric alcohol are mixed, at 75~85 DEG C, by gained mixed system and chain extender and
Catalyst mixing, obtains reaction solution；
At 165~175 DEG C, the reaction solution is subjected to first 1.5~2.5h of esterification, obtains the first esterification products
System；
At 190~210 DEG C, the first esterification products system is subjected to the second esterification, until reaction water yield reaches
To the 120% of theoretical water number out, esterification products system is obtained.
Preferably, the temperature of the polycondensation reaction is 240~245 DEG C, and the time is 2~3.5h.
The present invention provides the high barrier degradable copolyester materials that preparation method described in above-mentioned technical proposal is prepared
Material.
The present invention provides a kind of preparation methods of high barrier degradable copolyester material, first synthesizing imide list
Body, then dant monomer and adipic acid, butanediol are carried out copolyreaction and obtain copolyester material.The acyl that the present invention is prepared
Imide monomers have heteroaromatic binary acid structure, have not only contained aromatic ring structure but also have contained layer structure；Aromatic ring structure can be improved
The fragrant hybrid structure of integral strength, impact property and heat resistance of material etc., stratiform then takes blocking effect to vapor, is used for
Improve the whole barrier property of material；The aliphatic polyester that esterification obtains can be degradable under field conditions (factors), being capable of band
The degradation process of dynamic heteroaromatic copolyesters, realizes quick, totally biodegradable.Data according to the embodiment are it is found that the present invention
381.0 DEG C of tensile strength 23.9MPa, the weightless temperature of high barrier degradable copolyester material, shore hardness 44, dimension card it is soft
Change point 109 DEG C, elongation at break 385%, steam penetrating capacity (15 μm) 48g/ (m2For 24 hours), degradation property is qualified.Illustrate this
The polyurethane material that invention provides can not only meet barrier requirement, but also have preferable mechanical property, hot property, and can be complete
Complete biodegradable.
Meanwhile preparation method simple process provided by the invention, production cost are low, solve current degradation material production
The problem of complex process and high production cost.
Detailed description of the invention
Fig. 1 is the thermal analysis system curve (DSC curve) of dant monomer prepared by embodiment 1；
Fig. 2 is the infrared spectrum of dant monomer prepared by embodiment 1；
Fig. 3 is the infrared spectrum of copolyesters prepared by embodiment 1；
Fig. 4 is the thermal analysis system curve (DSC curve) of copolyesters prepared by embodiment 1；
Fig. 5 is the thermogravimetic analysis (TGA) curve (TGA curve) of copolyesters prepared by embodiment 1；
Fig. 6 is the thermal analysis curve (DSC curve) of copolyesters prepared by embodiment 2；
Fig. 7 is the infrared spectrum of copolyesters prepared by embodiment 2；
Fig. 8 is the thermal analysis curve (DSC curve) of copolyesters prepared by embodiment 3；
Fig. 9 is the infrared spectrum of copolyesters prepared by embodiment 3.
Specific embodiment
The present invention provides a kind of preparation methods of high barrier degradable copolyester material, comprising the following steps:
(1) p-aminobenzoic acid, trimellitic anhydride and basic solvent are mixed, in 20~30 DEG C of progress imidization reactions
8~10h obtains imidization reaction system；
(2) the imidization reaction system is mixed with benzene kind solvent, is dehydrated at 120~175 DEG C, until water yield
Reach theoretical water number out, obtains dant monomer；
(3) dant monomer, adipic acid and dihydric alcohol are mixed, is esterified under chain extender and catalyst action
Reaction, obtains esterification products system；
(4) under polycondensation antioxidant and polycondensation catalyst effect, the esterification products system is subjected to polycondensation reaction, is obtained
High barrier degradable copolyester material.
The present invention mixes p-aminobenzoic acid, trimellitic anhydride and basic solvent, in 20~30 DEG C of progress imidizates
8~10h is reacted, imidization reaction system is obtained.In the present invention, the basic solvent is preferably dimethyl acetamide
(DMAC), N-Methyl pyrrolidone (NMP) or N,N-dimethylformamide (DMF).In the present invention, the p-aminobenzoic acid
Molar ratio with trimellitic anhydride is preferably 1:0.8~1.2, more preferably 1:0.9~1.1, most preferably 1:1.The present invention couple
The additive amount of the amide solvent does not have special restriction, imidization reaction can be made to go on smoothly；In the present invention
Embodiment in, specifically p-aminobenzoic acid is mixed with amide solvent so that the solid content of system be 50%, then plus
Enter trimellitic anhydride and is uniformly mixed progress imidization reaction.The present invention preferably carried out under nitrogen protection atmosphere it is described mixing with
And the imidization reaction.
After obtaining imidization reaction system, the present invention mixes the imidization reaction system with benzene kind solvent,
120~175 DEG C are dehydrated, until water yield reaches theoretical water number out, obtain dant monomer.In the present invention, the benzene class
Solvent is preferably toluene, dimethylbenzene or trimethylbenzene；The additive amount of the benzene kind solvent is preferably capable the final of maintenance system
The solid content of product is 50%.The present invention is preferably dehydrated at 125-145 DEG C, is more preferably flowed back in benzene kind solvent
At a temperature of be dehydrated.In the present invention, the dehydration preferably carries out under agitation；The speed of the stirring is preferably
30-40r/min.The present invention does not have special restriction for the theoretical water number out, according to the actual situation, using art technology
Mode known to personnel judges theoretical water number out.In an embodiment of the present invention, specifically dehydration no longer increases to water yield
Add, that is, is considered as and reaches theoretical water number out, complete dehydration, obtain dant monomer.
After completing the dehydration, dehydration system is preferably continuously heating to the boiling of selected benzene kind solvent by the present invention
Point removes benzene kind solvent, stops heating and pours out liquid while hot, obtains viscous product；Then gained viscous product was carried out
Filter, washing and recrystallization, obtain dant monomer.The present invention pours out liquid after removing benzene kind solvent while hot can prevent product
Wall built-up influences the acquisition of dant monomer.In the present invention, the washing preferably includes the salt acid elution and acetone that successively carry out
Washing, the present invention remove the p-aminobenzoic acid not reacted completely using the salt acid elution, are removed using the acetone washing
Unreacted trimellitic anhydride and residual solvent.The present invention does not have special limitation to the mode of the filtering and recrystallization, selects
It is filtered and is recrystallized with mode well known to those skilled in the art.
The structure for the dant monomer that the present invention obtains is as follows:
After obtaining dant monomer, the present invention mixes the dant monomer, adipic acid and dihydric alcohol, in chain extender and
Esterification is carried out under catalyst action, obtains esterification products system.In the present invention, the dant monomer, adipic acid and
The molar ratio of dihydric alcohol is preferably 0.2~0.45:0.55~0.8:1.5~2, more preferably 0.25~0.4:0.6~0.7:1.6
~1.8.In the present invention, the dihydric alcohol is preferably ethylene glycol, 1,3-PD, 1,4-butanediol, 1,5-PD or 1,
6- hexylene glycol.
In the present invention, the additional amount of the chain extender preferably accounts for the high barrier degradable copolyester quality of materials
1~2 ‰.In the present invention, the chain extender is preferably the combination of bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin
Object, the mass ratio of the bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin are preferably 18~48:5~15:55~70,
More preferably 20~40:8~12:60~65.The present invention is preferably by bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin
It is mixed in proportion, obtains the composition of bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin.The present invention utilizes expansion
Chain agent improves molecular weight of product.
In the present invention, the additional amount of the catalyst preferably accounts for the high barrier degradable copolyester quality of materials
0.3~0.5 ‰.In the present invention, the catalyst is preferably the composition, antimony oxide and dioxy of antimony acetate and zinc acetate
Change the butanediol compound or germanium oxide of titanium.
In the present invention, in the composition of the antimony acetate and zinc acetate, the mass ratio of the antimony acetate and zinc acetate is excellent
It is selected as 1:0.6~0.8；The present invention preferably mixes zinc acetate with antimony acetate in proportion, obtains antimony acetate and zinc acetate
Composition.
In the present invention, the preparation method of the butanediol compound of the antimony oxide and titanium dioxide preferably include with
Lower step: dispersing titanium dioxide in 1,4-butanediol, and heating carries out 2.5~3.5h of reflux, and antimony oxide is then added,
Continue 20~22h of reflux, obtains the butanediol compound of antimony oxide and titanium dioxide；Wherein, the antimony oxide with
The mass ratio of titanium dioxide is 1:1.5~2.0；The mass ratio of the gross mass of the butanediol and antimony oxide and titanium dioxide
For 1.5~2.5:1.
The present invention does not have the germanium oxide special restriction, is using commercial goods well known to those skilled in the art
It can.
In the present invention, the esterification preferably includes following steps:
Dant monomer, adipic acid and dihydric alcohol are mixed, at 75~85 DEG C, by gained mixed system and chain extender and
Catalyst mixing, obtains reaction solution；
At 165~175 DEG C, the reaction solution is subjected to first 1.5~2.5h of esterification, obtains the first esterification products
System；
At 190~210 DEG C, the first esterification products system is subjected to the second esterification, until reaction water yield reaches
To the 120% of theoretical water number out, esterification products system is obtained.
The present invention preferably mixes dant monomer, adipic acid and dihydric alcohol, at 75~85 DEG C, by gained mixed system
It is mixed with chain extender and catalyst, obtains reaction solution.The present invention does not have the mixing of the dant monomer, adipic acid and dihydric alcohol
There is special limitation, mode well known to those skilled in the art is selected to be mixed.The present invention is preferably under agitation
Gained mixed system is mixed with chain extender and catalyst after dant monomer, adipic acid and dihydric alcohol are mixed, the stirring
Revolving speed is preferably 30-40r/min.
After obtaining reaction solution, the present invention carries out the first esterification 1.5 preferably at 165~175 DEG C, by the reaction solution
~2.5h obtains the first esterification products system.The present invention is preferably warming up to 165~175 DEG C by way of ladder-elevating temperature, described
Preferably pass through 1h rises to 140~145 DEG C from room temperature to the mode of ladder-elevating temperature, rises to 155~160 DEG C using 30min, then pass through
It crosses 30min and rises to 165~175 DEG C, and be maintained at 165~175 DEG C and carry out the first esterification.The present invention uses ladder-elevating temperature
Mode can control heating rate well, thus the speed and reaction process of reaction can be directly controlled, it can be ensured that ester
Change the more complete progress of reaction, reduces the generation of side reaction.
After obtaining the first esterification products system, the present invention is preferably at 190~210 DEG C, by the first esterification products body
System carries out the second esterification, until reaction water yield reaches theory goes out water number 120%, obtains esterification products system.This hair
It is bright there is no special restriction for the theoretical water number out, according to the actual situation, using mode well known to those skilled in the art
The theoretical water number out of judgement.In a specific embodiment of the present invention, specifically according to theoretical value=18g/mol* (acid imide list
Body molal quantity+adipic acid monomer molar number) * 2 come computational theories go out water number.The present invention reaches theoretical water outlet by controlling water yield
The 120% of value, can reduce influence of the ethylene glycol cyclization to water yield, and reduce the generation of side reaction, so that polycondensation
Reaction is normally carried out, so that product reaches desired molecular weight.In the present invention, after completing first esterification, institute
The first esterification products system is obtained without carrying out any other processing, is directly warming up to 190~210 DEG C of second esterifications of progress；
It in the present invention, is preferably 14~16 DEG C/h by the heating rate that the first esterification products system heats up, more preferably
15℃/h。
After obtaining esterification products system, the present invention produces the esterification under polycondensation antioxidant and polycondensation catalyst effect
Objects system carries out polycondensation reaction, obtains high barrier degradable copolyester material.In the present invention, the polycondensation antioxidant plus
Enter amount preferably accounts for the high barrier degradable copolyester quality of materials 1~2 ‰.In the present invention, the polycondensation antioxidant
Preferably include Hinered phenols antioxidant, thioester antioxidant and phosphite ester antioxidant, the Hinered phenols antioxidant, sulphur
Weight ratio for esters antioxidant and phosphite ester antioxidant is preferably 45~65:20~30:10~25.In the present invention,
The Hinered phenols antioxidant is preferably -4 monomethyl phenol of 2,8 1 di-t-butyl or four [β-(3,5- di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester；The thioester antioxidant is preferably (18) ester of thio-2 acid two or thio-2 acid
Dilauryl；The phosphite ester antioxidant is preferably (2,4- di-tert-butyl-phenyl) ester of phosphorous acid three or bis- (bis- uncles of 2,4-
Butyl phenyl) pentaerythritol diphosphites.The present invention improves product quality color problem using antioxidant.
In the present invention, the additional amount of the polycondensation catalyst preferably accounts for the high barrier degradable copolyester material matter
0.6~the 1.2 ‰ of amount.In the present invention, the polycondensation catalyst is preferably titanium magnesium compound, the preparation of the titanium magnesium compound
Method preferably includes following steps:
Butyl titanate and methanol are hybridly prepared into saturated solution, 22~26h is heated to reflux, evaporates half
Solvent, by resulting material with titanium valve according to mass ratio 1:(0.8~1.2) it mixes, obtain titanium catalyst；
The titanium catalyst and magnesium oxide powder are sufficiently mixed uniformly in mass ratio, obtain titanium magnesium compound.
The titanium valve is preferably the titanium valve of KRTi-3 model in the present invention.In the present invention, the magnesium oxide powder
Partial size preferably 20~100nm；In the present invention, the magnesium oxide powder is the carrier as titanium catalyst.In the present invention, institute
The mass ratio for stating titanium catalyst and magnesium oxide powder is preferably 55~75:25~45.
The present invention accelerates reaction using polycondensation catalyst, makes fully reacting.
In the present invention, the temperature of the polycondensation reaction is preferably 240~245 DEG C, and the time is preferably 2~3.5h.This hair
It is bright that the polycondensation reaction is carried out preferably in vacuum.In the present invention, the detailed process vacuumized preferably exists
75MPa is at the uniform velocity evacuated to by normal pressure in 30min, keeps this pressure to stop 10min, is at the uniform velocity taken out very using the time of 60min
Sky keeps this pressure to stop 5min, then sets vacuum pumping rate as 0.1MPa/10min, stabilization is evacuated to 1MPa
500Pa or less.
The present invention, which utilizes to vacuumize, can guarantee reaction efficiency；By-product in polycondensation process is removed into reactant
System improves the molecular weight distribution of reaction product, improves molecular weight of product；Butanediol extra in polycondensation process is removed, makes small point
Subchain section continues that polymerization reaction occurs, and balance moves to right, and ensures that molecular weight constantly increases, to obtain polycondensation product.
After completing the polycondensation reaction, gained polycondensation product is preferably discharged, is cooled down, check rod, pelletizing, done by the present invention
Dry and test of drawing a design, obtains high barrier degradable copolyester material.The present invention is to the discharging, cooling, check rod, pelletizing, dry
Dry and test of drawing a design mode does not have special restriction, and mode well known to those skilled in the art is selected to carry out.
The present invention provides the high barrier degradable copolyester materials that preparation method described in above-mentioned technical proposal is prepared
Material.
High barrier degradable copolyester material provided by the invention is described in detail below with reference to embodiment, but
It is that they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Under nitrogen protection, 8mol (1096g) p-aminobenzoic acid is added in 5L three-neck flask, is subsequently added into
The DMAC solvent of 3710g makes system maintain the state of solid content 50%, carries out stirring at normal temperature, and dissolving it sufficiently becomes transparent
Solution；8mol (1536g) trimellitic acid is added in the ratio for being 1:1 according still further to trimellitic anhydride and p-aminobenzoic acid molar ratio
Acid anhydride continues stirring to being completely dispersed uniformly, is at this time yellowish-brown clear solution, and maintenance system temperature is 25 DEG C, stirs and carries out
Imidization reaction 8h obtains imidization reaction system；Then it is molten that 1000g toluene is added into imidization reaction system
Agent, warming while stirring to system can flow back just, carry out reflux dewatering, until water yield is not further added by, reach reaction eventually
Point, record water yield reach 144g, are continuously heating to system boiling point, and to remove toluene, liquid is poured out in stopping heating while hot,
Obtain viscous product；Finally obtained viscous product is filtered, salt acid elution, acetone washing and recrystallization, drying obtain
Dant monomer weighs, yield 95%；
Dant monomer, adipic acid and 1,4- butanediol obtained above is weighed to be added by 0.2:0.8:1.55 molar ratio
In 10L melt polycondensation reaction kettle, after beginning heat to 80 DEG C, stirring is opened, 2 ‰ chain extender (as mass fraction, bis-phenols are added
A type epoxy resin (model E-55): 28%, glycerol: 15%, novolac epoxy resin (model F170): 57%), 0.5 ‰ oxygen
Change germanium, obtains reaction solution；Then it sets ladder-elevating temperature: rising to 140 DEG C from room temperature by 1h, rise to 160 DEG C using 0.5h, then
170 DEG C are risen to by 0.5h, 170 DEG C of first esterification 2h of progress is kept, then sets heating rate as 15 DEG C/h, be warming up to
200 DEG C of second esterifications of progress are as esterified terminal until reaction water yield reaches the 120% of theoretical value, obtain esterification and produce
Object；
After obtaining esterification products, 1 ‰ polycondensation antioxidant (as mass fraction, the 2,8 of 45% are added in batch condensation polymerization reactor
- 4 monomethyl phenol of one di-t-butyl, 30% (18) ester of thio-2 acid two and 25% phosphorous acid three (the tertiary fourth of 2.4- bis-
Base phenyl) ester), 1.2 ‰ polycondensation catalysts (titanium magnesium compound: mass ratio is titanium catalyst: magnesium=55:45), system is warming up to
It 240 DEG C, is then slowly evacuated to high vacuum (500Pa or less), reaction temperature is kept to carry out polycondensation reaction 3h at 240 DEG C,
Discharging, cooling, check rod, pelletizing, drying, test of drawing a design, obtain copolyester material.
Fig. 1 is the thermal analysis system curve graph of dant monomer prepared by embodiment 1.As seen from the figure, have one at 91.68 DEG C
A apparent sharp peak, and then there is a flat peak at the fusing point peak of monomer, it may be possible to due to washing in finishing operations below thus
Insufficient or drying is not thorough the solvent peak left, it is also possible to due to caused by test process Instrumental, but not influence this
The fusing point peak of monomer illustrates that the monomer of synthesis is relatively simple.
Fig. 2 is the infrared spectrum of dant monomer prepared by embodiment 1.As seen from the figure, in 2800~3100cm-1Place has red
Outer absorption, there are C-H bonds for display, are determined as organic compound；If there are amino in sample, can exist as the shape of a saddle
Two blunt absorption peaks (band), and in spectrogram 3300cm-1Near, corresponding peak is not seen, thus primarily determine amino
Taken part in reaction；In 2999.28cm-lNearby there is very strong, very wide absorption peak, display contains carboxylic acid structure；1722.71cm-1
Locating absorption peak is characteristic feature peak existing for imide structure；1689.67cm-1Locating overtone is that there are altitude feature peaks for phenyl ring；
1605.70cm-1、1513.44cm-1、1486.85cm-1For vibration peak caused by phenyl ring skeletal vibration；Phenyl ring is produced because of substitution
It is raw to absorb (900~650cm-1), because there are two phenyl ring, the position of substitution of phenyl ring is also different in structure, one takes for two
Generation one replaces for three, thus respectively in 860.92cm-1、796.35cm-1With 720.15cm-1、654.11cm-1Occur at position
Out-of-plane bending absorption peak；1365.82cm-1The absorption peak to be formed is conjugated for phenyl ring double bond and C-O double bond；1297.20cm-1、
1222.02cm-1For C-H in-plane bending vibration peak on phenyl ring；By spectrum analysis it is found that dant monomer prepared by embodiment 1
Has characteristic absorption peak, it was demonstrated that this reacts the dant monomer of available specific structure.
Fig. 3 is the infrared spectrum of copolyesters prepared by embodiment 1, and as seen from the figure, the C-O-C among carboxylate absorbs
1300~1050cm-1, the absorption of aromatic carboxylates is in relatively high wavenumber region, because the position of two carboxyl is slightly different,
It is influenced by adjacent group, is distributed in 1274.83cm-lWith 1213.07cm-lAt two positions, the wherein suction of fat carboxylic ether
It is received in relatively low wavenumber region 1094.94cm-lAt position；In about 721.50cm-lAbsorption peak be adipate polyester segment in
6 connected CH2Group；The skeletal vibration of phenyl ring is in~1450cm-1,~1500cm-1,~1580cm-1,~1600cm-1, miscellaneous
Aromatic ring and phenyl ring have similarity, in~1600cm-1,~1500cm-1,~1400cm-1There are absorption band, thus body at three
It is slightly overlapped in present spectrogram, shows as 1604.59cm-1、1511.54cm-1、1420.32cm-1There is absorption peak；
1722.68cm-1Absorption peak out is the characteristic peak of imide structure.Above data illustrates that copolyesters has been prepared in embodiment 1.
Fig. 4 is the thermal analysis system curve graph of copolyesters prepared by embodiment 1, as seen from the figure, the copolyesters that embodiment 1 synthesizes
Occur the peak that a sharp peak is primary product in spectrogram to exist although another small peak does not mark and illustrate product
It is not single substance, only content is relatively small, and in addition to primary product, there is also another by-product polyester, because it is
Polyester sheet structure, thus all have high barrier, and its melting temperature is higher, have in terms of improving material hot property compared with
No matter good effect, be single use or be blended to use with other degradable materials, all has preferable advantage.
Fig. 5 is the thermogravimetic analysis (TGA) curve of copolyesters prepared by embodiment 1, as seen from the figure, the copolyesters that embodiment 1 synthesizes
With preferable heat resistance.
Embodiment 2
Under nitrogen protection, 8mol (1096g) p-aminobenzoic acid is added in the three-neck flask of 5L, is subsequently added into
3710gNMP solvent makes system maintain the state of solid content 50%, carries out stirring at normal temperature, and dissolving it sufficiently becomes transparent molten
Liquid；8mol (1536g) trimellitic anhydride is added in the ratio for being 1:1 according still further to trimellitic anhydride and p-aminobenzoic acid molar ratio,
Continue stirring to being completely dispersed uniformly, be at this time yellowish-brown clear solution, maintenance system temperature is 25 DEG C, stirs and carries out acyl Asia
Aminating reaction 8h obtains imidization reaction system；Then 1000g xylene solvent is added into imidization reaction system,
Warming while stirring can flow back just to system, carry out reflux dewatering, until water yield is not further added by, reach reaction end,
Record water yield reaches 144g, is continuously heating to system boiling point, to remove toluene, stops heating, pours out liquid while hot, obtain
Viscous product；Finally obtained viscous product is filtered, salt acid elution, acetone washing and recrystallization, it is dry, obtain acyl Asia
Amine monomers weigh, yield 94%；
Dant monomer, adipic acid and 1,3- propylene glycol obtained above is weighed to be added by 0.45:0.55:1.8 molar ratio
In 10L melt polycondensation reaction kettle, after beginning heat to 80 DEG C, stirring is opened, 1 ‰ chain extender (as mass fraction, bis-phenols are added
A type epoxy resin (model E-51): 18%, glycerol: 12%, novolac epoxy resin (model F170): 70%), 0.3 ‰ vinegar
The composition (mass ratio of antimony acetate and zinc acetate is 1:0.6) of sour antimony and zinc acetate, obtains reaction solution；Then ladder liter is set
Temperature: rising to 140 DEG C by 1h room temperature, rise to 160 DEG C using 0.5h, rise to 170 DEG C using 0.5h, keeps 170 DEG C of progress
First esterification 2h then sets heating rate as 15 DEG C/h, is warming up to 200 DEG C of second esterifications of progress, until reaction
Water yield reaches the 120% of theoretical value, as esterification terminal, obtains esterification products；
After obtaining esterification products, 1.6 ‰ polycondensation antioxidant (as mass fraction, 65% are added in batch condensation polymerization reactor
Four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters, 20% dilauryl thiodipropionate, 15%
Phosphorous acid three (2.4- di-tert-butyl-phenyl) ester), 0.6 ‰ polycondensation catalysts (titanium magnesium compound: titanium catalyst: magnesium=75:25),
System is warming up to 240 DEG C, is then slowly evacuated to high vacuum (500Pa or less), and reaction temperature is kept to contract at 245 DEG C
Poly- reaction 3.5h, reaches discharging torque, discharging, cooling, check rod, pelletizing, drying, test of drawing a design obtain copolyester material.
Fig. 6 is the thermal analysis system curve graph of copolyesters prepared by embodiment 2, a peak occurs in figure, peak packet is larger, but right
It is on the one hand since reaction monomers are variant, separately than for the test result of embodiment 1, the purity of product is improved
On the one hand solvent is slightly different with monomer in reaction, and the elevation of boiling point, reaction temperature also increases, and may be conducive to the single anti-of reaction
It answers.
Fig. 7 is the infrared spectrum of copolyesters prepared by embodiment 2, as seen from the figure, is analyzed with the infrared spectrum in embodiment 1
Comparison, main feature functional group is substantially similar, belongs to copolyester product, meets the spectrogram for speculating product.
Embodiment 3
Under nitrogen protection, 8mol (1096g) p-aminobenzoic acid is added in the three-neck flask of 5L, is subsequently added into
3710gDMF solvent makes system maintain the state of solid content 50%, carries out stirring at normal temperature, and dissolving it sufficiently becomes transparent molten
Liquid；8mol (1536g) trimellitic anhydride is added in the ratio for being 1:1 according still further to trimellitic anhydride and p-aminobenzoic acid molar ratio,
Continue stirring to being completely dispersed uniformly, be at this time yellowish-brown clear solution, maintenance system temperature is 25 DEG C, stirs and carries out acyl Asia
Aminating reaction 8h obtains imidization reaction system；Then 1000g front three benzene solvent is added into imidization reaction system,
Warming while stirring can flow back just to system, carry out reflux dewatering, until water yield is not further added by, reach reaction end,
Record water yield reaches 144g, is continuously heating to system boiling point, to remove toluene, stops heating, pours out liquid while hot, obtain
Viscous product；Finally obtained viscous product is filtered, it is sub- to obtain acyl for salt acid elution, acetone washing and recrystallization, drying
Amine monomers weigh, yield 94%；
It weighs dant monomer, adipic acid and ethylene glycol obtained above and 10L melting contracting is added by 0.4:0.6:2 molar ratio
In poly- reaction kettle, after beginning heat to 80 DEG C, stirring is opened, 1 ‰ chain extender (as mass fraction, bisphenol type epoxy trees are added
Rouge (model E-44): 40%, polyether-tribasic alcohol: 5%, novolac epoxy resin (model F51): 55%), 0.4 ‰ esterification urge
The butanediol compound (mass ratio of antimony oxide and titanium dioxide is 1:2.0) of agent antimony oxide and titanium dioxide,
Obtain reaction solution；Then it sets ladder-elevating temperature: rising to 140 DEG C from room temperature by 1h, rise to 160 DEG C using 0.5h, using
0.5h rises to 170 DEG C, keeps 170 DEG C of first esterification 2h of progress, then sets heating rate as 15 DEG C/h, be warming up to 200
DEG C carry out the second esterification, until reaction water yield reach the 120% of theoretical value, as esterification terminal, obtain esterification products；
After obtaining esterification products, 1.6 ‰ polycondensation antioxidant (as mass fraction, 55% are added in batch condensation polymerization reactor
Four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters, 25% thio-2 acid two (18) ester, 20%
Bis- (2,4- di-tert-butyl-phenyl) pentaerythritol diphosphites), 0.8 ‰ polycondensation catalysts (titanium magnesium compound: titanium catalysis
Agent: magnesium=70:30), system is warming up to 240 DEG C, is then slowly evacuated to high vacuum (500Pa or less), keeps reaction temperature
Polycondensation reaction 2.75h is carried out at 240 DEG C, reaches discharging torque, discharging, cooling, check rod, pelletizing, drying, test of drawing a design obtain
To copolyester material.
Fig. 8 is the thermal analysis system curve graph of copolyesters prepared by embodiment 3, occurs one as seen from the figure, in spectrogram sharply
Peak be primary product peak, for the test result of embodiment 1 and embodiment 2, the purity of product is improved,
It on the one hand is since reaction monomers are variant, on the other hand solvent is slightly different with monomer in reaction, the elevation of boiling point, reaction temperature
Also it increases, the single reaction of reaction may be conducive to.
Fig. 9 is the infrared spectrum of copolyesters prepared by embodiment 3, as seen from the figure, and red in embodiment 1 and embodiment 2
Outer spectrum analysis comparison, main feature functional group is substantially similar, belongs to copolyester product, meets the spectrogram for speculating product.
The copolyester material that Examples 1 to 3 obtains is tested for the property, experimental result is shown in Table 1.
The performance data of the copolyester material of 1 Examples 1 to 3 of table preparation
As seen from the above embodiment, copolyester material provided by the invention has excellent barrier property and degradability,
Tensile strength 23.9MPa, 381.0 DEG C of weightless temperature, shore hardness 44,109 DEG C of Vicat softening point, elongation at break 385%, water
Vapor permeation amount (15 μm) 48g/ (m2For 24 hours), degradation property is qualified.Meanwhile the method and process of offer of the invention is simple, raw
It produces at low cost, solves the problems, such as that current degradation material production technology is complicated and high production cost.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of preparation method of high barrier degradable copolyester material, comprising the following steps:
(1) by p-aminobenzoic acid, trimellitic anhydride and basic solvent mix, 20~30 DEG C of progress imidization reactions 8~
10h obtains imidization reaction system；
(2) the imidization reaction system is mixed with benzene kind solvent, is dehydrated at 120~175 DEG C, until water yield reaches
Theory goes out water number, obtains dant monomer；
(3) dant monomer, adipic acid and dihydric alcohol are mixed, carries out being esterified under chain extender and catalyst action anti-
It answers, obtains esterification products system；
(4) under polycondensation antioxidant and polycondensation catalyst effect, the esterification products system is subjected to polycondensation reaction, obtains high resistant
Every property degradable copolyester material.
2. preparation method according to claim 1, which is characterized in that p-aminobenzoic acid and inclined benzene in the step (1)
The molar ratio of three acid anhydrides is 1:0.8~1.2.
3. preparation method according to claim 1, which is characterized in that dant monomer in the step (3), adipic acid and
The molar ratio of dihydric alcohol is 0.2~0.45:0.8~0.55:1.5~2.
4. preparation method according to claim 1, which is characterized in that the chain extender in the step (3) is bisphenol-A type ring
The composition of oxygen resin, trihydroxylic alcohol and novolac epoxy resin, the bisphenol A type epoxy resin, trihydroxylic alcohol and novolac epoxy resin
Mass ratio be 18~48:5~15:55~70.
5. preparation method according to claim 1, which is characterized in that catalyst in the step (3) be antimony acetate with
The butanediol compound or germanium oxide of the composition of zinc acetate, antimony oxide and titanium dioxide.
6. according to claim 1, preparation method described in 4 or 5, which is characterized in that the additional amount of the chain extender accounts for the height
1~the 2 ‰ of barrier property degradable copolyester quality of materials；The additional amount of the catalyst accounts for the degradable copolymerization of the high barrier
The 0.3 of ester material quality~0.5 ‰.
7. preparation method according to claim 1, which is characterized in that the esterification in the step (3) includes following
Step:
Dant monomer, adipic acid and dihydric alcohol are mixed, at 75~85 DEG C, by gained mixed system and chain extender and catalysis
Agent mixing, obtains reaction solution；
At 165~175 DEG C, the reaction solution is subjected to first 1.5~2.5h of esterification, obtains the first esterification products body
System；
At 190~210 DEG C, the first esterification products system is subjected to the second esterification, until reaction water yield reaches reason
By the 120% of water number out, esterification products system is obtained.
8. preparation method according to claim 1, which is characterized in that the temperature of the polycondensation reaction is 240~245 DEG C,
Time is 2~3.5h.
9. the high barrier degradable copolyester material that any one of claim 1~8 preparation method is prepared.
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| CN115124705A (en) * | 2021-03-26 | 2022-09-30 | 华润化学材料科技股份有限公司 | Degradable copolyester material and preparation method and application thereof |
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