CN112980161A - High-transparency PBAT material and preparation method and application thereof - Google Patents
High-transparency PBAT material and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a high-transparency PBAT material which comprises the following components in parts by weight: 100 parts of PBAT resin; 20-50 parts of transparent modified resin; 3-5 parts of a stiffening agent; 5-10 parts of a filler; 0.1-2 parts of a lubricant; the transparent modified resin is obtained by blending a degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) according to a weight ratio of 2: 8-5: 5. According to the invention, the transparent modified resin prepared by blending the degradable polyester elastomer and the poly (3-hydroxybutyrate-co-4-hydroxybutyrate) in a specific ratio is added, so that the transparency and rigidity of the PBAT material can be obviously improved, the high-transparency PBAT material can be prepared, the PBAT material can be used for preparing a PBAT film with high light transmittance, good puncture resistance and excellent mechanical property, the use requirement of the packaging field on the film material can be met, and the application of the PBAT material is further widened.
Description
Technical Field
The invention relates to the technical field of degradable materials, in particular to a high-transparency PBAT material and a preparation method and application thereof.
Background
High molecular polymers have been widely used in various fields related to human life, but since most of the polymers are derived from petroleum and cracked products, the waste materials thereof cannot be degraded into carbon cycle in natural environment. The huge amount of non-degradable plastics used by human beings cause serious pollution to the natural environment, bring unmeasurable pressure to the environment and resources, and in order to deal with the problem of environmental pollution, the research and development of degradable high-physical-property substitute materials become popular.
In recent years, with the development of degradable polymers such as polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), Polycaprolactone (PCL), and the like, environmentally-friendly plastic products have become new industrial stars in the plastic industry. Although the comprehensive performance of PLA is the most excellent, the development and popularization of PLA products are severely restricted by the problems that the productivity is limited all over the world at present, the batch stability of raw materials is poor, the price is high and the like. Commercial conversion of PBAT is superior compared to that of PBAT. PBAT is a copolymer of butanediol adipate and butanediol terephthalate, has the characteristics of PBA and PBT, and has better ductility, elongation at break, heat resistance and impact property; it can be made into film product and applied to various aspects of packaging field, etc.
However, the current PBAT film products have poor transparency and still have a great limitation in the field of packaging due to the low modulus and poor rigidity of PBAT itself.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a high-transparency PBAT material, and a PBAT film prepared from the high-transparency PBAT material has high light transmittance and excellent mechanical property and puncture resistance.
Another object of the invention is to provide a method for preparing the above highly transparent PBAT material.
The invention is realized by the following technical scheme:
a high-transparency PBAT material comprises the following components in parts by weight:
100 parts of PBAT resin;
20-50 parts of transparent modified resin;
3-5 parts of a stiffening agent;
5-10 parts of a filler;
0.1-2 parts of a lubricant;
the transparent modified resin is obtained by blending a degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) according to a weight ratio of 2: 8-5: 5.
The invention aims to modify the PBAT resin, so the invention does not require the specification parameters of the PBAT resin. In general, a general-purpose film-grade PBAT resin can be used, and particularly, a blue mountain tun river TH-801T, a basf PBAT Ecoflex BX7011, a golden technology Flex-64D, a Jinhuilongong Ecoworld and the like can be selected.
The transparent modified resin is prepared by blending degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) in a specific ratio, and can be prepared by the following preparation method: the preparation method comprises the steps of baking the degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) at 55-65 ℃ for 1.5-3.5 h, adding the mixture into a double-screw extruder according to the proportion, extruding and granulating at 130-190 ℃ to obtain the transparent modified resin. Specifically, the preparation process conditions can be set as that the screw is heated in eight sections, and the temperature of 1-8 sections is 130 ℃, 140 ℃, 150 ℃, 165 ℃, 175 ℃, 185 ℃, 190 ℃ and 190 ℃.
The crystallization of PBAT can be greatly inhibited by adding the transparent modified resin, and the transparency of the PBAT material is improved; meanwhile, the rigidity reduction caused by soft and hard phase separation can be effectively inhibited, so that the tensile strength and tensile modulus of the PBAT material are obviously improved; in addition, the transparent modified resin used in the invention has typical hydrolyzability and photolysis, does not influence the degradation performance of the PBAT material after being blended with the PBAT resin, and keeps the original high degradation.
The degradable polyester elastomer comprises the following components in parts by weight: 10-30 parts of liquid polyester polyol; 35-50 parts of polypropylene carbonate; 10-25 parts of a chain extender; 0.01-3 parts of an initiator; 10-25 parts of isocyanate.
The liquid polyester polyol is selected from any one or more of vegetable oil derivatives; preferably, the liquid polyester polyol is selected from one or more of castor oil derivatives, soybean oil derivatives, palm oil derivatives, cashew nut shell oil derivatives, pine nut oil derivatives or rosin oil derivatives; the vegetable oil derivatives have wide sources and low price, and can be rapidly degraded after being buried in soil. More preferably, the number average molecular weight of the liquid polyester polyol is 3000-5000.
The number average molecular weight of the polypropylene carbonate is 1000-1500.
The chain extender is 1, 4-butanediol; the initiator is dibutyltin dilaurate.
The isocyanate is selected from any one or more of 1, 5-naphthalene diisocyanate NDI, dimethylbiphenyl diisocyanate TODI, xylylene diisocyanate XDI or 4, 4' -dicyclohexylmethane diisocyanate HMDI.
The invention provides a preparation method of a degradable polyester elastomer, which comprises the following steps: according to the proportion, mixing liquid polyester polyol, polypropylene carbonate, a chain extender and an initiator, heating to 140-160 ℃, performing mechanical dispersion, vacuumizing to remove water for 1-3 hours until the water content of the mixture is lower than 200ppm, cooling to 70-100 ℃, adding isocyanate under the protection of nitrogen, and performing polymerization reaction for 1-10 hours at 70-100 ℃ to obtain the degradable polyester elastomer.
Preferably, the melt index of the degradable polyester elastomer is 8-20 g/10min under the conditions of 2.16kg and 180 ℃.
Preferably, the content of NCO% of the degradable polyester elastomer is 1% -3%; too high an NCO% content leads to a decrease in the stability of the PBAT material.
The stiffening agent is selected from colorless C9 petroleum resin.
The filler is selected from transparent talcum powder; preferably, the mesh number of the transparent talcum powder is 3000-5000 meshes.
The lubricant is selected from any one or more of polyethylene wax, oxidized polyethylene wax or paraffin wax.
According to the material performance requirement, the high-transparency PBAT material also comprises 0.1-2 parts of an auxiliary agent in parts by weight; the auxiliary agent comprises any one or more of an antioxidant, a light stabilizer or an ultraviolet absorber.
The antioxidant is at least one selected from antioxidant 1010, antioxidant 1076 and antioxidant T501.
The light stabilizer is at least one selected from the group consisting of a light stabilizer 770, a light stabilizer 944, a light stabilizer 622, a light stabilizer 2002, a light stabilizer 783 and a light stabilizer 2020.
The ultraviolet absorbent is at least one selected from the group consisting of UV531, UV234, UV326, UV327, UV328, UV329 and UV 1130.
The invention also provides a preparation method of the high-transparency PBAT material, which comprises the following steps:
(1) drying the PBAT resin, the transparent modified resin and the filler at the temperature of 55-65 ℃ for 1.5-3.5 h;
(2) according to the proportion, putting the dried PBAT resin, the transparent modified resin, the filler and other components into a high-speed mixer, mixing for 40-80 s at the rotating speed of 500-1000 r/min, and then increasing the rotating speed to 1000-2000 r/min for mixing for 10-30 s to uniformly mix the materials;
(3) and (3) putting the mixed material into a double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is 48, the temperature is 130-190 ℃, and extruding and granulating to obtain the high-transparency PBAT material.
The invention also provides application of the high-transparency PBAT material, which can be used for preparing PBAT films, and can be particularly applied to the field of packaging or the field of agriculture. The high-transparency PBAT material can be used for preparing a PBAT film through a film blowing process; the preparation method can specifically adopt the following steps: and (3) putting the high-transparency PBAT material into a film blowing machine, wherein the temperature of a screw 1-4 area is 150 ℃, 170 ℃, 180 ℃ and 190 ℃, the die head processing temperature is 190 ℃, the blow-up ratio is 1-4, and the film blowing thickness is 12-30 mu m, so as to obtain the PBAT film.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the PBAT resin is modified by the transparent modified resin prepared by blending the degradable polyester elastomer and the poly (3-hydroxybutyrate-co-4-hydroxybutyrate) in a specific ratio, so that the transparency of the PBAT material can be obviously improved, and the rigidity of the PBAT material can be improved.
(2) The PBAT film prepared from the high-transparency PBAT material has high transparency (the light transmittance is not lower than 75%) and excellent mechanical property (the tensile modulus reaches more than 900 MPa), simultaneously keeps good puncture resistance, can meet the use requirement of the packaging field on the film material, and further widens the application of the PBAT material.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The raw materials used in the examples and comparative examples of the present invention are described below, but are not limited to these materials:
liquid polyester polyol 1: soybean oil derivative, number average molecular weight 5000, commercially available;
liquid polyester polyol 2: rosin oil derivative, number average molecular weight 3000, commercially available;
polypropylene carbonate 1: number average molecular weight 1000, commercially available;
polypropylene carbonate 2: number average molecular weight 1500, commercially available;
chain extender: 1, 4-butanediol, commercially available;
initiator: dibutyltin dilaurate, commercially available;
isocyanate 1: 1, 5-naphthalene diisocyanate NDI, bayer Desmodur 15, germany;
isocyanate 2: xylylene diisocyanate XDI, Takenate 500, Mitsui, Japan;
poly (3-hydroxybutyrate-co-4-hydroxybutyrate): p34HB, tianjin national rhyme biomaterials ltd;
PBAT resin 1: tsuntun river TH-801T;
PBAT resin 2: basf PBAT Ecoflex BX 7011;
PBAT resin 3: jinfa science and technology Flex-64D;
PBAT resin 4: glowing of aurora ecodord;
a stiffening agent: colorless C9 petroleum resin, commercially available;
packing 1: transparent talcum powder with 5000 meshes;
and (3) filler 2: transparent talcum powder with 3000 meshes;
lubricant 1: polyethylene wax, commercially available;
and lubricant 2: oxidized polyethylene wax, commercially available;
auxiliary agent 1: antioxidant 1010, commercially available;
and (3) auxiliary agent 2: ultraviolet absorber UV531, commercially available;
and (3) auxiliary agent: light stabilizer 770, commercially available.
The preparation method of the degradable polyester elastomer comprises the following steps: according to the proportion shown in the table 1, mixing liquid polyester polyol, polypropylene carbonate, 1, 4-butanediol and dibutyltin dilaurate, heating to 140-160 ℃, performing mechanical dispersion, vacuumizing to remove water for 1-3 hours until the water content of the mixture is lower than 200ppm, cooling to 70-100 ℃, adding isocyanate under the protection of nitrogen, and performing polymerization reaction for 1-10 hours at 70-100 ℃ to obtain the degradable polyester elastomer.
Method for testing NCO% content of degradable polyester elastomer: adopting a hydrochloric acid-di-n-butylamine titration method;
method for testing melt index of degradable polyester elastomer: tested according to the standard GB/T3682.1-2018, the test conditions are as follows: 180 ℃ and 2.16 kg.
Table 1: the distribution ratio (by weight) of each component of the degradable polyester elastomer and related performance parameters
| Degradable polyester elastomer 1 | Degradable polyester elastomer 2 | Degradable polyester elastomer 3 | |
| Liquid polyester polyol 1 | 20 | 10 | |
| Liquid polyester polyol 2 | 30 | ||
| Polypropylene carbonate 1 | 50 | 50 | |
| Polypropylene carbonate 2 | 35 | ||
| 1, 4-butanediol | 15 | 10 | 15 |
| Dibutyl tin dilaurate | 1 | 0.05 | 3 |
| IsocyanatesAcid esters 1 | 15 | 25 | |
| Isocyanate 2 | 25 | ||
| NCO% content | 3% | 1% | 2% |
| Melt index/g/10 min | 15 | 8 | 10 |
The preparation method of the transparent modified resin comprises the following steps: the preparation method comprises the steps of baking the degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) at 55-65 ℃ for 1.5-3.5 h, adding the mixture into a double-screw extruder according to a ratio, heating the screws in eight sections, extruding and cutting the materials at 1-8 sections of 130 ℃, 140 ℃, 150 ℃, 165 ℃, 175 ℃, 185 ℃, 190 ℃ and 190 ℃ to obtain the transparent modified resin.
Transparent modified resin 1: the weight ratio of the degradable polyester elastomer 1 to the P34HB is 2: 8;
transparent modified resin 2: the weight ratio of the degradable polyester elastomer 1 to the P34HB is 4: 6;
transparent modified resin 3: the weight ratio of the degradable polyester elastomer 2 to the P34HB is 3: 7;
transparent modified resin 4: the weight ratio of the degradable polyester elastomer 3 to the P34HB is 5: 5;
transparent modified resin 5: the weight ratio of the degradable polyester elastomer 1 to the P34HB is 8: 2;
transparent modified resin 6: the weight ratio of the degradable polyester elastomer 1 to the P34HB is 1: 9.
the performance test method comprises the following steps:
light transmittance: testing according to the standard GB/T3682.1-2018;
tensile strength, tensile modulus: tested according to the standard GB/T1040-;
puncture resistance strength: tested according to the standard GB/T10004-.
Method for the preparation of the highly transparent PBAT materials of examples and comparative examples:
(1) drying the PBAT resin, the transparent modified resin and the filler at the temperature of 55-65 ℃ for 1.5-3.5 h;
(2) according to the mixture ratio shown in the table 2, putting the dried PBAT resin, the transparent modified resin, the filler and other components into a high-speed mixer, mixing for 40-80 s at the rotating speed of 500-1000 r/min, and then increasing the rotating speed to 1000-2000 r/min for mixing for 10-30 s to uniformly mix the materials;
(3) and putting the mixed material into a double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is 48, heating the mixture in eight sections, and extruding and granulating the mixture at the temperature of 130 ℃, 140 ℃, 150 ℃, 165 ℃, 175 ℃, 185 ℃, 190 ℃ and 190 ℃ in 1-8 sections to obtain the high-transparency PBAT material.
Putting the high-transparency PBAT material into a film blowing machine, wherein the temperature of a screw 1-4 area is 150 ℃, 170 ℃, 180 ℃ and 190 ℃, the die head processing temperature is 190 ℃, the blow-up ratio is 4, and the film blowing thickness is 12 mu m to prepare a PBAT film; various performance tests were performed on the PBAT films, and the test results are shown in table 2.
Table 2: distribution ratio (by weight) of each component of high-transparency PBAT material of examples and comparative examples and performance test result of PBAT thin film prepared
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| PBAT resin 1 | 100 | 100 | 100 | 100 | 100 | |||
| PBAT resin 2 | 100 | |||||||
| PBAT resin 3 | 100 | |||||||
| PBAT resin 4 | 100 | |||||||
| Transparent modified resin 1 | 20 | 35 | ||||||
| Transparent modified resin 2 | 20 | |||||||
| Transparent modified resin 3 | 45 | |||||||
| Transparent modified resin 4 | 30 | |||||||
| Transparent modified resin 5 | 20 | |||||||
| Transparent modified resin 6 | 20 | |||||||
| Stiffening agent | 3 | 3 | 5 | 4 | 3 | 3 | 3 | 3 |
| Filler 1 | 5 | 5 | 7 | 5 | 5 | 5 | ||
| Filler 2 | 5 | 5 | ||||||
| Lubricant agent | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 |
| Antioxidant 1010 | 0.1 | 0.1 | / | / | 0.1 | 0.1 | 0.1 | 0.1 |
| UV531 | 0.1 | 0.1 | / | 0.1 | / | 0.1 | 0.1 | 0.1 |
| Light stabilizer 770 | 0.1 | 0.1 | / | / | / | 0.1 | 0.1 | 0.1 |
| Light transmittance | 75% | 78% | 95% | 84% | 86% | 70% | 69% | 25% |
| Tensile strength/MPa | 24 | 26 | 38 | 32 | 30 | 22 | 20 | 14 |
| Tensile modulus/MPa | 900 | 950 | 1150 | 1050 | 1100 | 900 | 750 | 550 |
| Puncture resistance strength/g | 420 | 400 | 560 | 480 | 500 | 220 | 200 | 400 |
As can be seen from the above examples and comparative examples, the transparency of the PBAT film can be significantly improved by adding the transparent modified resin, the light transmittance of the PBAT film is not less than 75%, and simultaneously the tensile strength and tensile modulus of the PBAT film are significantly improved, and good puncture resistance is maintained. Comparative example 1/2 compared with example 1, the ratio of the degradable polyester elastomer of the added transparent modified resin and P34HB was out of the required range, the PBAT film had lower light transmittance, and the puncture resistance was decreased. Comparative example 3 compared with example 1, the PBAT film had low light transmittance and poor mechanical properties without adding a transparent modified resin.
Claims (10)
1. A high-transparency PBAT material is characterized by comprising the following components in parts by weight:
100 parts of PBAT resin;
20-50 parts of transparent modified resin;
3-5 parts of a stiffening agent;
5-10 parts of a filler;
0.1-2 parts of a lubricant;
the transparent modified resin is obtained by blending a degradable polyester elastomer and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) according to a weight ratio of 2: 8-5: 5.
2. The high transparent PBAT material of claim 1, characterized in that the degradable polyester elastomer comprises the following components by weight: 10-30 parts of liquid polyester polyol; 35-50 parts of polypropylene carbonate; 10-25 parts of a chain extender; 0.01-3 parts of an initiator; 10-25 parts of isocyanate.
3. The highly transparent PBAT material according to claim 2, characterized in that the liquid polyester polyol is selected from any one or several of vegetable oil derivatives; preferably, the liquid polyester polyol is selected from one or more of castor oil derivatives, soybean oil derivatives, palm oil derivatives, cashew nut shell oil derivatives, pine nut oil derivatives or rosin oil derivatives; more preferably, the number average molecular weight of the liquid polyester polyol is 3000-5000; the number average molecular weight of the polypropylene carbonate is 1000-1500; the chain extender is 1, 4-butanediol; the initiator is dibutyltin dilaurate; the isocyanate is selected from any one or more of 1, 5-naphthalene diisocyanate NDI, dimethylbiphenyl diisocyanate TODI, xylylene diisocyanate XDI or 4, 4' -dicyclohexylmethane diisocyanate HMDI.
4. The high-transparency PBAT material according to claim 1, wherein the degradable polyester elastomer has a melt index of 8-20 g/10min at 180 ℃ under 2.16 kg; the NCO% content of the degradable polyester elastomer is 1% -3%.
5. The high-transparency PBAT material according to any one of claims 2 to 4, wherein the preparation method of the degradable polyester elastomer comprises the following steps: according to the proportion, mixing liquid polyester polyol, polypropylene carbonate, a chain extender and an initiator, heating to 140-160 ℃, performing mechanical dispersion, vacuumizing to remove water for 1-3 hours until the water content of the mixture is lower than 200ppm, cooling to 70-100 ℃, adding isocyanate under the protection of nitrogen, and performing polymerization reaction for 1-10 hours at 70-100 ℃ to obtain the degradable polyester elastomer.
6. The highly transparent PBAT material of claim 1, characterized in that the stiffening agent is selected from the group consisting of colorless C9 petroleum resin; the filler is selected from transparent talcum powder; the mesh number of the transparent talcum powder is 3000-5000 meshes; the lubricant is selected from any one or more of polyethylene wax, oxidized polyethylene wax or paraffin wax.
7. The high-transparency PBAT material according to claim 1, further comprising 0.1 to 2 parts by weight of an auxiliary agent; the auxiliary agent comprises any one or more of an antioxidant, a light stabilizer or an ultraviolet absorber.
8. The method for preparing the high-transparency PBAT material according to any one of claims 1 to 7, characterized by comprising the following steps:
(1) drying the PBAT resin, the transparent modified resin and the filler at the temperature of 55-65 ℃ for 1.5-3.5 h;
(2) according to the proportion, putting the dried PBAT resin, the transparent modified resin, the filler and other components into a high-speed mixer, mixing for 40-80 s at the rotating speed of 500-1000 r/min, and then increasing the rotating speed to 1000-2000 r/min for mixing for 10-30 s to uniformly mix the materials;
(3) and (3) putting the mixed material into a double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is 48, the temperature is 130-190 ℃, and extruding and granulating to obtain the high-transparency PBAT material.
9. The use of the high transparent PBAT material according to any of claims 1 to 7, characterized in that the high transparent PBAT material is used for the preparation of PBAT thin films.
10. Use of a highly transparent PBAT material according to claim 9, characterized in that it is applied in the field of packaging or agriculture.
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|---|---|---|---|---|
| CN113843999A (en) * | 2021-09-26 | 2021-12-28 | 中国科学技术大学先进技术研究院 | Preparation method of polybutylene adipate/terephthalate film |
| CN116239884A (en) * | 2023-02-22 | 2023-06-09 | 高梵(浙江)信息技术有限公司 | Waterproof breathable film for fabric and preparation method thereof |
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| CN113843999A (en) * | 2021-09-26 | 2021-12-28 | 中国科学技术大学先进技术研究院 | Preparation method of polybutylene adipate/terephthalate film |
| CN113843999B (en) * | 2021-09-26 | 2023-07-04 | 中国科学技术大学先进技术研究院 | Preparation method of poly (adipic acid)/poly (butylene terephthalate) film |
| CN116239884A (en) * | 2023-02-22 | 2023-06-09 | 高梵(浙江)信息技术有限公司 | Waterproof breathable film for fabric and preparation method thereof |
| CN116239884B (en) * | 2023-02-22 | 2024-04-09 | 高梵(浙江)信息技术有限公司 | Waterproof breathable film for fabric and preparation method thereof |
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| CN112980161B (en) | 2022-08-05 |
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