CN112280017A - Preparation method of antistatic PBST polymer and antistatic PBST polymer - Google Patents
Preparation method of antistatic PBST polymer and antistatic PBST polymer Download PDFInfo
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- CN112280017A CN112280017A CN202011059450.XA CN202011059450A CN112280017A CN 112280017 A CN112280017 A CN 112280017A CN 202011059450 A CN202011059450 A CN 202011059450A CN 112280017 A CN112280017 A CN 112280017A
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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
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
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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
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
Abstract
The application discloses a preparation method of an antistatic PBST polymer and the antistatic PBST polymer, belonging to the technical field of polymer preparation. The method comprises the following steps: mixing succinic acid, butanediol and a first catalyst, and then carrying out a first esterification reaction to obtain a first intermediate product; mixing terephthalic acid, butanediol and a second catalyst, and then carrying out a second esterification reaction to obtain a second intermediate product; carrying out pre-polycondensation reaction on the first catalyst, the second catalyst, the polyethylene glycol ether with set dosage and the polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product; and performing final polycondensation on the pre-polycondensation product to obtain the antistatic PBST polymer. The polymer is prepared by the method. The method introduces the polyglycol ether on the PBST main chain, and the polyglycol ether can increase the antistatic performance of the PBST copolymer and has good antistatic effect and durability. In addition, the first esterification reaction and the second esterification reaction are separately carried out, so that more side products can be avoided.
Description
Technical Field
The invention relates to the technical field of preparation of polymers, in particular to a preparation method of an antistatic PBST polymer and the antistatic PBST polymer.
Background
The PBST polymer product has high strength and can be biodegraded, thereby realizing the circulation in nature and being widely applied to the fields of mulching films, fibers and the like, thereby being an ideal green high polymer material. The poly (butylene terephthalate) -co-succinate is a poly (butylene terephthalate) -co-succinate, but the application of the poly (butylene terephthalate) -co-succinate in certain occasions is limited due to the existence of static electricity in the application of the existing occasions.
Disclosure of Invention
In view of the above, the present invention provides a method for preparing an antistatic PBST polymer and an antistatic PBST polymer, which can improve the antistatic performance of PBST and can prevent the generation of more byproducts, thereby being more practical.
In order to achieve the first object, the technical scheme of the preparation method of the antistatic PBST polymer provided by the invention is as follows:
the preparation method of the co-antistatic PBST polymer comprises the following steps:
mixing succinic acid, butanediol and a first catalyst, and then carrying out a first esterification reaction to obtain a first intermediate product, wherein the molar ratio of the adipic acid to the butanediol ranges from (1: 1.2) to (1: 1.3), the first catalyst is tetrabutyl titanate, the molar amount of the first catalyst is 0.01-0.03% of the molar amount of the succinic acid, and the reaction temperature of the first esterification reaction ranges from 165 ℃ to 175 ℃;
mixing terephthalic acid, butanediol and a second catalyst, and then carrying out a second esterification reaction to obtain a second intermediate product, wherein the molar ratio of the terephthalic acid to the butanediol ranges from (1: 2) to (1: 4), the second catalyst is tetraisopropyl titanate, the molar amount of the second catalyst is 0.01-0.03% of that of the terephthalic acid, and the reaction temperature of the second esterification reaction ranges from 245 ℃ to 255 ℃;
the method comprises the following steps of carrying out pre-polycondensation reaction on a first catalyst, a second catalyst, polyethylene glycol ether with a set dosage and a polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product, wherein the polycondensation catalyst is tetraisopropyl titanate, the weight ratio of a first intermediate product to a second intermediate product ranges from (1: 1) to (1: 2), the addition amount of the pre-polycondensation catalyst ranges from 0.02 to 0.04 percent of the total mass of phthalic acid and succinic acid, and the reaction temperature of the pre-polycondensation reaction ranges from 230 ℃ to 245 ℃;
and carrying out final polycondensation reaction on the pre-polycondensation product to obtain the antistatic PBST polymer, wherein the value range of the reaction temperature of the final polycondensation reaction is 260-270 ℃.
The preparation method of the antistatic PBST polymer provided by the invention can be further realized by adopting the following technical measures.
As a preference, the first and second liquid crystal compositions are,
the first esterification reaction is carried out in a first esterification reaction kettle, and the value range of the esterification rate of the first esterification reaction is 98-99.5%.
As a preference, the first and second liquid crystal compositions are,
the second esterification reaction is carried out in a second esterification reaction kettle, and the value range of the esterification rate of the second esterification reaction is 98-99.5%.
As a preference, the first and second liquid crystal compositions are,
pumping the first intermediate product into the polymerization reaction kettle through a first melt metering pump;
and pumping the second intermediate product into the polymerization reaction kettle by a second melt metering pump.
Preferably, the final polycondensation reaction of the pre-polycondensation product to obtain the antistatic PBST polymer specifically comprises the following steps:
slowly vacuumizing the pre-polycondensation product for 40-70 min to ensure that the value range of the vacuum degree is 60-150 Pa;
the duration of the pre-polycondensation reaction ranges from 30min to 50min, and the temperature is increased from 230 ℃ to 245 ℃ to 260 ℃ to 270 ℃ after the temperature is slowly increased;
and when the limiting range of the intrinsic viscosity of the reactants reaches 0.72dL/g-0.75 dL/g, terminating the final polycondensation reaction, and sequentially discharging and pelletizing to obtain the antistatic PBST polymer.
Preferably, a stabilizer is further added in the pre-polymerization reaction process, the stabilizer is an antioxidant 1010, and the stable molar weight range is 0.01-0.03% of the total molar weight of the terephthalic acid and the succinic acid.
Preferably, the molecular weight of the polyethylene glycol ether ranges from 2000-5000, and the addition amount of the polyethylene glycol ether is 3-8% of the total mass of the terephthalic acid and the succinic acid.
Preferably, the polyethylene glycol ether and the polycondensation catalyst are added through a feed inlet of the polymerization kettle.
Preferably, when the limiting range of the intrinsic viscosity of the reactants reaches 0.72dL/g-0.75 dL/g, the final polycondensation reaction is terminated, and after discharging and pelletizing are sequentially carried out, in the step process of obtaining the antistatic PBST polymer, nitrogen is filled into the polymerization reaction kettle to pressurize in the discharging process, so that the pressure in the polymerization reaction kettle ranges from 3 kg/cm to 4kg/cm2。
In order to achieve the second object, the technical scheme of the antistatic PBST polymer provided by the invention is as follows:
the antistatic PBST polymer provided by the invention is prepared by the preparation method of the antistatic PBST polymer provided by the invention.
In the preparation method of the antistatic PBST polymer, the polyglycol ether is introduced into the PBST main chain, and the polyglycol ether can improve the antistatic performance of the PBST copolymer and has good antistatic effect and durability. More importantly, in the preparation method of the antistatic PBST polymer, the first esterification reaction and the second esterification reaction are carried out separately, so that more side products are avoided. Wherein, the reaction temperature and the reaction time are controlled in the range, which is beneficial to improving the conversion rate of each reaction stage and controlling the polymerization degree of the product in a proper range, so as to obtain the precipitation-resistant antistatic PBST polymer product. The preparation method of the antistatic PBST polymer provided by the invention controls the technological parameters such as the feeding flow rate, the vacuum degree and the like in the esterification reaction, the pre-polycondensation and the final polycondensation within the range, and is favorable for ensuring that the esterification reaction, the pre-polycondensation and the final polycondensation have better stability, thereby further improving the quality of the product. The antistatic PBST polymer is prepared by the method, wherein the antistatic PBST polymer has good precipitation resistance. Wherein, the esterification rate of the first esterification reaction is 98-99.5%, which can avoid the degradation of residual succinic acid in the second esterification. The esterification rate of the second esterification reaction is 98-99.5%, the generation of byproduct tetrahydrofuran is less, and the high molecular weight PBST can be prepared. In the synthesis process of the pre-polycondensation reaction PBST, because of the existence of a small amount of oxygen, thermal oxidation degradation reaction can occur under the condition of high temperature, and the stabilizer can be added to effectively capture the generated free radicals of the degradation reaction, so that the degradation reaction can be stopped.
Detailed Description
In view of the above, the present invention provides a method for preparing an antistatic PBST polymer and an antistatic PBST polymer, which can improve the antistatic performance of PBST, and thus can improve the use performance thereof, thereby being more practical.
To further illustrate the technical means and effects of the present invention for achieving the predetermined objects, the following detailed description will be given to the preparation method of the antistatic PBST polymer and the antistatic PBST polymer according to the present invention with reference to the preferred embodiments, structures, characteristics and effects thereof. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
The chemical reaction equation of the preparation method of the antistatic PBST polymer provided by the invention is as follows:
a first esterification reaction:
second esterification reaction:
and (3) polycondensation reaction:
example 1
100 kg of succinic acid is added into a first esterification kettle, the amount of the added butanediol is 1.2: 1 relative to the molar amount of the added butanediol, tetrabutyl titanate catalyst is added (0.02 percent relative to the molar amount of the succinic acid), and the esterification rate reaches 99.0 percent at the esterification temperature of 165 ℃ to obtain a first product.
100 kg of terephthalic acid is added into a second esterification kettle, the amount of butanediol (the molar ratio of the butanediol to the succinic acid is 1.3: 1) is added, a tetraisopropyl titanate catalyst (0.02 percent of the molar amount of the succinic acid) is added, the esterification temperature is 250 ℃, the esterification rate reaches 99.0 percent, and a second product is obtained.
Mixing the first product and the second product in a weight ratio of 1: 1 are respectively pumped into a polymerization reaction kettle, and the molar weight of the added stabilizer antioxidant 1010 is 0.01 percent of the total molar weight of the terephthalic acid and the succinic acid. The molecular weight of the added polyglycol ether is 2000; the adding amount of the additive is 4 percent of the total mass of the phthalic acid and the succinic acid.
The reaction temperature of the pre-polycondensation reaction is 245 ℃, and the reaction time is 50 min; slowly vacuumizing for 70 minutes; the degree of vacuum was 60 Pa. The reaction temperature of the final polycondensation reaction was 265 ℃.
And stopping stirring when the intrinsic viscosity is 0.72dL/g, closing the vacuum, introducing nitrogen for pressurization, discharging, and pelletizing to obtain the permanent antistatic PBST polymer.
Example 2
100 kg of succinic acid is added into a first esterification kettle, the amount of the added butanediol is 1.2: 1 relative to the molar amount of the added butanediol, tetrabutyl titanate catalyst is added (0.02 percent relative to the molar amount of the succinic acid), and the esterification rate reaches 99.0 percent at the esterification temperature of 175 ℃, so as to obtain a first product.
100 kg of terephthalic acid is added into a second esterification kettle, the amount of butanediol (the molar ratio of the butanediol to the succinic acid is 1.3: 1) is added, the tetraisopropyl titanate catalyst (0.02 percent of the molar amount of the succinic acid) is added, the esterification temperature is 255 ℃, the esterification rate reaches 99.0 percent, and a second product is obtained.
Mixing the first product and the second product in a weight ratio of 1: 1 are respectively pumped into a polymerization reaction kettle, and the molar weight of the added stabilizer antioxidant 1010 is 0.01 percent of the total molar weight of the terephthalic acid and the succinic acid. The molecular weight of the added polyglycol ether is 2000; the adding amount of the additive is 6 percent of the total mass of the phthalic acid and the succinic acid.
The reaction temperature of the pre-polycondensation reaction is 245 ℃, and the reaction time is 50 min; slowly vacuumizing for 60 minutes; the degree of vacuum was 60 Pa. The reaction temperature of the final polycondensation reaction was 265 ℃.
And stopping stirring when the intrinsic viscosity is 0.73dL/g, closing the vacuum, introducing nitrogen for pressurization, discharging, and pelletizing to obtain the precipitation-resistant antistatic PBST polymer.
Example 3
100 kg of succinic acid is added into a first esterification kettle, the amount of the added butanediol is 1.2: 1 relative to the molar amount of the added butanediol, tetrabutyl titanate catalyst is added (0.02 percent relative to the molar amount of the succinic acid), and the esterification rate reaches 99.0 percent at the esterification temperature of 165 ℃ to obtain a first product.
100 kg of terephthalic acid is added into a second esterification kettle, the amount of butanediol (the molar ratio of the butanediol to the succinic acid is 1.3: 1) is added, a tetraisopropyl titanate catalyst (0.02 percent of the molar amount of the succinic acid) is added, the esterification temperature is 250 ℃, the esterification rate reaches 99.0 percent, and a second product is obtained.
Mixing the first product and the second product in a weight ratio of 1: 1 are respectively pumped into a polymerization reaction kettle, and the molar weight of the added stabilizer antioxidant 1010 is 0.01 percent of the total molar weight of the terephthalic acid and the succinic acid. The molecular weight of the added polyglycol ether is 2000; the adding amount of the additive is 8 percent of the total mass of the phthalic acid and the succinic acid.
The reaction temperature of the pre-polycondensation reaction is 245 ℃, and the reaction time is 50 min; slowly vacuumizing for 70 minutes; the degree of vacuum was 60 Pa. The reaction temperature of the final polycondensation reaction was 265 ℃.
And stopping stirring when the intrinsic viscosity is 0.75dL/g, closing the vacuum, introducing nitrogen for pressurization, discharging, and pelletizing to obtain the permanent antistatic PBST polymer.
Example 4
100 kg of succinic acid is added into a first esterification kettle, the amount of the added butanediol is 1.2: 1 relative to the molar amount of the added butanediol, tetrabutyl titanate catalyst is added (0.02 percent relative to the molar amount of the succinic acid), and the esterification rate reaches 99.0 percent at the esterification temperature of 165 ℃ to obtain a first product.
100 kg of terephthalic acid is added into a second esterification kettle, the amount of butanediol (the molar ratio of the butanediol to the succinic acid is 1.3: 1) is added, a tetraisopropyl titanate catalyst (0.02 percent of the molar amount of the succinic acid) is added, the esterification temperature is 250 ℃, the esterification rate reaches 99.0 percent, and a second product is obtained.
Mixing the first product and the second product in a weight ratio of 1: 1 are respectively pumped into a polymerization reaction kettle, and the molar weight of the added stabilizer antioxidant 1010 is 0.01 percent of the total molar weight of the terephthalic acid and the succinic acid. The molecular weight of the added polyglycol ether is 2000; the adding amount of the additive is 6 percent of the total mass of the phthalic acid and the succinic acid.
The reaction temperature of the pre-polycondensation reaction is 245 ℃, and the reaction time is 50 min; slowly vacuumizing for 70 minutes; the degree of vacuum was 60 Pa. The reaction temperature of the final polycondensation reaction was 270 ℃.
And stopping stirring when the intrinsic viscosity is 0.73dL/g, closing the vacuum, introducing nitrogen for pressurization, discharging, and pelletizing to obtain the permanent antistatic PBST polymer.
Example 5
100 kg of succinic acid is added into a first esterification kettle, the amount of the added butanediol is 1.2: 1 relative to the molar amount of the added butanediol, tetrabutyl titanate catalyst is added (0.02 percent relative to the molar amount of the succinic acid), and the esterification rate reaches 99.0 percent at the esterification temperature of 165 ℃ to obtain a first product.
100 kg of terephthalic acid is added into a second esterification kettle, the amount of butanediol (the molar ratio of the butanediol to the succinic acid is 1.3: 1) is added, a tetraisopropyl titanate catalyst (0.02 percent of the molar amount of the succinic acid) is added, the esterification temperature is 250 ℃, the esterification rate reaches 99.0 percent, and a second product is obtained.
Mixing the first product and the second product in a weight ratio of 1: 1 are respectively pumped into a polymerization reaction kettle, and the molar weight of the added stabilizer antioxidant 1010 is 0.01 percent of the total molar weight of the terephthalic acid and the succinic acid. The molecular weight of the added polyglycol ether is 2000; the adding amount of the additive is 8 percent of the total mass of the phthalic acid and the succinic acid.
The reaction temperature of the pre-polycondensation reaction is 245 ℃, and the reaction time is 50 min; slowly vacuumizing for 70 minutes; the degree of vacuum was 60 Pa. The reaction temperature of the final polycondensation reaction was 270 ℃.
And stopping stirring when the intrinsic viscosity is 0.75dL/g, closing the vacuum, introducing nitrogen for pressurization, discharging, and pelletizing to obtain the permanent antistatic PBST polymer.
The permanently antistatic PBST polymers prepared in examples 1 to 5 were subjected to a performance test as follows:
tensile strength: the tensile strength of the product was tested by the ASTM D638 standard method, and a greater tensile strength indicates a greater rigidity of the molecular chain of the product.
Elongation at break: the product was tested for elongation at break by the ASTM D638 standard method, with greater elongation at break indicating better toughness of the product.
Heat resistance: the antistatic performance of the product is tested by a GB/T1410-2006 standard method.
The test results are shown in table 1:
TABLE 1
| Examples | Tensile strength/MPa | Elongation at break/% | Surface resistance/ohm | Surface appearance after 5 days |
| 1 | 42 | 39 | 8.5×108 | Without precipitation |
| 2 | 41 | 40 | 8.7×107 | Without precipitation |
| 3 | 40 | 41 | 3.2×107 | Without precipitation |
| 4 | 40 | 40 | 6.5×107 | Without precipitation |
| 5 | 39 | 40 | 2.7×107 | Without precipitation |
| External antistatic agent PBST | 38 | 39 | 3.1×108 | Severe precipitation |
From the above description, it can be seen that the antistatic PBST prepared by the method of the present invention has not only good antistatic performance, but also no small molecule precipitation, and greatly improves the service performance of the antistatic PBST.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A preparation method of an antistatic PBST polymer is characterized by comprising the following steps:
mixing succinic acid, butanediol and a first catalyst, and then carrying out a first esterification reaction to obtain a first intermediate product, wherein the molar ratio of the succinic acid to the butanediol ranges from (1: 1.2) to (1: 1.3), the first catalyst is tetrabutyl titanate, the molar weight of the first catalyst is 0.01-0.03% of that of the succinic acid, and the reaction temperature of the first esterification reaction ranges from 165 ℃ to 175 ℃;
mixing terephthalic acid, butanediol and a second catalyst, and then carrying out a second esterification reaction to obtain a second intermediate product, wherein the molar ratio of the terephthalic acid to the butanediol ranges from (1: 2) to (1: 4), the second catalyst is tetraisopropyl titanate, the molar amount of the second catalyst is 0.01-0.03% of that of the terephthalic acid, and the reaction temperature of the second esterification reaction ranges from 245 ℃ to 255 ℃;
the method comprises the following steps of carrying out pre-polycondensation reaction on a first catalyst, a second catalyst, polyethylene glycol ether with a set dosage and a polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product, wherein the polycondensation catalyst is tetraisopropyl titanate, the weight ratio of a first intermediate product to a second intermediate product ranges from (1: 1) to (1: 2), the addition amount of the pre-polycondensation catalyst ranges from 0.02 to 0.04 percent of the total mass of phthalic acid and succinic acid, and the reaction temperature of the pre-polycondensation reaction ranges from 230 ℃ to 245 ℃;
and carrying out final polycondensation reaction on the pre-polycondensation product to obtain the antistatic PBST polymer, wherein the value range of the reaction temperature of the final polycondensation reaction is 260-270 ℃.
2. The method of preparing antistatic PBST polymers according to claim 1,
the first esterification reaction is carried out in a first esterification reaction kettle, and the value range of the esterification rate of the first esterification reaction is 98-99.5%.
3. The method of preparing antistatic PBST polymers according to claim 1,
the second esterification reaction is carried out in a second esterification reaction kettle, and the value range of the esterification rate of the second esterification reaction is 98-99.5%.
4. The method of preparing antistatic PBST polymers according to claim 1,
pumping the first intermediate product into the polymerization reaction kettle through a first melt metering pump;
and pumping the second intermediate product into the polymerization reaction kettle by a second melt metering pump.
5. The method for preparing antistatic PBST polymers according to claim 1, wherein the pre-polycondensation product is subjected to a final polycondensation reaction to obtain the antistatic PBST polymers, comprising in particular the steps of:
slowly vacuumizing the pre-polycondensation product for 40-70 min to ensure that the value range of the vacuum degree is 60-150 Pa;
the duration time of the pre-polycondensation reaction ranges from 30min to 50min, and the temperature is increased from 230 ℃ to 245 ℃ to 260 ℃ to 270 ℃ after the temperature is slowly increased, wherein the temperature increase rate of the slow temperature increase ranges from 8 ℃ to 12 ℃/10 min;
and when the limiting range of the intrinsic viscosity of the reactants reaches 0.72dL/g-0.75 dL/g, terminating the final polycondensation reaction, and sequentially discharging and pelletizing to obtain the antistatic PBST polymer.
6. The method of claim 1, wherein a stabilizer is added during the pre-polycondensation reaction, wherein the stabilizer is an antioxidant 1010, and the amount of the stabilizing mole is 0.01 to 0.03% of the total molar amount of the terephthalic acid and the succinic acid.
7. The method for preparing antistatic PBST polymer as claimed in claim 1, wherein the molecular weight of the polyethylene glycol ether ranges from 2000-5000, and the addition amount of the polyethylene glycol ether is 3-8% of the total mass of the terephthalic acid and the succinic acid.
8. The method of claim 1 wherein the polyglycol ether and polycondensation catalyst are added through the feed port of the polymerization reactor.
9. The method for preparing the antistatic PBST polymer according to claim 1, wherein when the limiting range of the intrinsic viscosity of the reactants reaches 0.72dL/g to 0.75dL/g, the final polycondensation reaction is terminated, and after discharging and pelletizing are sequentially performed, during the step of obtaining the antistatic PBST polymer, during the discharging process, nitrogen is filled into the polymerization reactor for pressurization, so that the pressure in the polymerization reactor ranges from 3 kg/cm to 4kg/cm2。
10. An antistatic PBST polymer, characterized by being prepared by the method of preparing an antistatic PBST polymer according to any one of claims 1 to 9.
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| CN114210368A (en) * | 2021-11-18 | 2022-03-22 | 江西威科油脂化学有限公司 | Liquid phase catalyst and synthetic method for synthesizing erucamide by liquid phase catalysis |
| CN114210368B (en) * | 2021-11-18 | 2023-06-20 | 江西威科油脂化学有限公司 | Liquid phase catalyst and method for synthesizing erucamide by liquid phase catalysis |
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