CN107619585A - The purposes of biological poly furandicarboxylic acid butanediol ester modified polylactic resin - Google Patents
The purposes of biological poly furandicarboxylic acid butanediol ester modified polylactic resin Download PDFInfo
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- CN107619585A CN107619585A CN201610564395.7A CN201610564395A CN107619585A CN 107619585 A CN107619585 A CN 107619585A CN 201610564395 A CN201610564395 A CN 201610564395A CN 107619585 A CN107619585 A CN 107619585A
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- butanediol ester
- furandicarboxylic acid
- gas barrier
- polylactic resin
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Abstract
The invention discloses purposes of the biological poly furandicarboxylic acid butanediol ester modified polylactic resin in gas barrier material is prepared.The biological poly furandicarboxylic acid butanediol ester modified polylactic resin is 0.05~1.10cm respectively to the gas-premeable of oxygen, carbon dioxide etc.3/m2Datm and 0.12~0.72cm3/m2Datm, the transit dose to water vapour are 7.3~19.6g/m2D, there is excellent gas barrier property, thus available for the field for having higher requirements to barrier properties for gases, such as packaging field, can be especially useful for preparing medical packaging, beverage bottle, vegetables and fruits meat preservation box and preservative film etc..
Description
Technical field
The present invention relates to a kind of ester modified polylactic resin of biological poly and its application, and in particular to a kind of biological poly furan
Dioctyl phthalate butanediol ester modified polylactic resin of muttering belongs to bio-based high polymer material in preparing the purposes in gas barrier material
And Polymer Processing field.
Background technology
Development and industrialized deep, energy industry and plastic cement industry based on petroleum with global economy
Gradually influenceed by the short of oil, cause rise in price and there is lack of raw materials.Meanwhile with country to environmental issue increasingly
Pay attention to, the application of each based article of petrochemical origin also receives more strict limitation.For example, Jilin Province, China in 2015 is saved and started
Plastic limit is implemented in full, forbids selling and using the disposable nondegradable plastic packaging bag based on polyolefin polymers,
Make greater efforts to promote and promote simultaneously the research and application of degradable or bio-based source polymer product.
On the other hand, for packaging material etc., its gas barrier property is to need one of index of high spot reviews.Example
Such as, preservative film common at present and freshness protection package are prepared by polyethylene (PE) and polypropylene (PP) mostly, and it obstructs vapor
Better performances, but it is bad to oxygen barrier property, and for seafood, fruit etc. the easily food of oxydative spoilage, increase
Oxygen-barrier property is particularly significant.In another example due to adding carbon dioxide in soda, so the dioxy to its packaging material
It is very high to change carbon barrier, as the bottle of Coca-Cola employs polyethylene terephthalate (PET), it has excellent
Different gas barrier property and toughness, but terephthalic acid (TPA) is petroleum-based sources, it is very big to the white pollution of environment.
There is good gas barrier property to obtain, researcher studies more scheme using sandwich construction
Film.Such as a kind of Obstruct membrane of MULTILAYER COMPOSITE is proposed in CN105365316A, its barrier to vapor is excellent, but makes
Preparation Method is complicated, has selected a variety of high-resistant diaphragms to be mutually bonded and has formed.In recent years, bio-based barrier material has also obtained more
Research.For example, proposing a kind of oxygen Obstruct membrane containing barrier layer in CN102007001A, its barrier layer preparation method is more multiple
Miscellaneous, oxygen barrier property is preferable, but water vapor barrier property is poor.In another example one kind is proposed in CN104403294A to give birth to
The PPC and PBS multilayer Obstruct membranes of thing degraded, its oxygen barrier property is preferable, but needs to add calcium carbonate as third component.
The content of the invention
It is a primary object of the present invention to provide the use of biological poly furandicarboxylic acid butanediol ester modified polylactic resin
On the way, to overcome deficiency of the prior art.
To realize aforementioned invention purpose, the technical solution adopted by the present invention includes：
The embodiments of the invention provide biological poly furandicarboxylic acid butanediol ester modified polylactic resin to prepare gas
Purposes in barrier material.
Further, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin include PLA 67~
0.5~2wt% of 95wt%, poly- furandicarboxylic acid butanediol ester 4~30wt%, 0.5~1wt% of antioxidant and auxiliary agent.
Further, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin is also referred to as biological poly
Ester modified polylactic resin, its composition, preparation method and processing molding method etc. is as shown in CN105400165A.
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Application of the fat as gas barrier material.
Further, the gas that the gas barrier material can obstruct is included in oxygen, carbon dioxide and vapor
Any one or two or more combinations.
Further, at room temperature the biological poly furandicarboxylic acid butanediol ester modified polylactic resin as gas
Barrier film is respectively 0.04~1.10cm for the transmitance of oxygen, carbon dioxide3/m2Datm and 0.11~
0.72cm3/m2·d·atm。
Further, under conditions of temperature is 35 DEG C, the biological poly furandicarboxylic acid butanediol ester is modified poly- breast
Acid resin is 7.2~19.6g/m for the transit dose of vapor as gas barrier film2·d。
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat is as gas barrier material in the application in packaging, cosmetic, seperation film, medicine or optical field.
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Purposes of the fat as gas barrier material in preparing packaging material or improving the gas barrier property of packaging material.
Further, the shape of the gas barrier material includes membranaceous, sheet, tabular or bulk etc., but not limited to this.
Compared with prior art, the present invention at least has advantages below：
(1) the poly- furandicarboxylic acid used in biological poly furandicarboxylic acid butanediol ester modified polylactic resin of the present invention
Butanediol ester and PLA are full bio-based materials, can derive from plant etc., independent of fossil energy, have good ecology
Friendly；
(2) biological poly furandicarboxylic acid butanediol ester modified polylactic resin of the present invention is for oxygen, carbon dioxide, water
Steam etc. is respectively provided with good gas barrier property, such as：Its barrier (up to 0.13cm to carbon dioxide3/m2·d·
Atm) it is better than polyethylene terephthalate (PET, about 0.15cm as Coke bottle3/m2Datm), beverage can be used as
The extensive uses such as bottle, medical packaging and food fresh-keeping film, and, can also be extensive in fields such as cosmetic, seperation film, medicine, optics
Using.
Embodiment
In view of many deficiencies of existing gas barrier material, inventor is through studying for a long period of time and putting into practice, very unexpectedly
It was found that a kind of biological poly furandicarboxylic acid butanediol ester modified polylactic resin has for oxygen, carbon dioxide, vapor etc.
There is very excellent gas barrier property.Had been surprisingly found that based on this, inventor is able to propose technical scheme, such as
Under will be described in detail.
The embodiments of the invention provide a kind of biological poly furandicarboxylic acid butanediol ester modified polylactic resin to prepare
Purposes in gas barrier material.
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Application of the fat as gas barrier material.
Wherein, the gas that the gas barrier material can obstruct includes any in oxygen, carbon dioxide and vapor
One or more kinds of combinations, but not limited to this.
Further, at room temperature, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin is as gas
Body barrier film is respectively 0.04~1.10cm for the transmitance of oxygen, carbon dioxide3/m2Datm and 0.11~
0.72cm3/m2·d·atm。
Further, under conditions of temperature is 35 DEG C, the biological poly furandicarboxylic acid butanediol ester is modified poly- breast
Acid resin is 7.2~19.6g/m for the transit dose of vapor as gas barrier film2·d。
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat as gas barrier material packaging field application.
Further, the embodiments of the invention provide the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Purposes of the fat as gas barrier material in preparing packaging material or improving the gas barrier property of packaging material.
Further, the shape of the gas barrier material includes membranaceous, sheet, tabular or bulk.
Further, the packaging material includes box, bottle, bag, tank or preservative film etc., particularly has to gas barrier property
The packaging field of high requirement, such as：Medical packaging, beverage bottle, vegetables and fruits meat preservation box, preservative film etc., and not limited to this.
Further, foregoing biological poly furandicarboxylic acid butanediol ester modified polylactic resin (also known as biological poly
Ester modified polylactic resin, or referred to as polylactic acid modified resin, or abbreviation PLA modified resins), it includes what is calculated according to wt%
Following component：
As preferable, the PLA is extrusion grade PLA, and its fusing point is at 155~170 DEG C, such as can be selected
The Ingeo of NatureWorks companiesTMBiopolmer 4032D trade mark products.
As preferable, the poly- furandicarboxylic acid butanediol ester is the life containing furan nucleus dioctyl phthalate and butanediol structure
Thing base polyester, its inherent viscosity is between 0.8~1.2, and especially preferably 1.0 or so；It is further preferred that the furan nucleus two
The mol ratio of formic acid and butanediol structure is 1:1~4, especially preferably 1：3 or so.
As preferable, the antioxidant may be selected from one kind or several in phenols, phosphorous acid esters, sulfur-bearing esters oxidant
Kind, it can be selected from suitable type known in the art.More specifically, Hinered phenols antioxidant such as Switzerland Ciba companies antioxygen
Agent 1010,1076,1330.Phosphite ester kind antioxidant such as Switzerland Ciba companies irgasfos 168, Irgafos 12；Clariant
The PEPQ of company.Ciba companies of Switzerland containing sulfur type antioxidant DLTP, DSTP.
Further, the auxiliary agent may include but be not limited in lubricant, heat stabilizer, UV absorbers one kind or
Several, it can be selected from suitable type known in the art.More specifically, the PETS- of for example Italian FACI companies of lubricant
3、PETS-4；UV absorbers such as Nanjing Milan Chemical Co., Ltd. UV-531 or UV-326.It is further preferred that for example moisten
Lubrication prescription is PETS-3, UV absorbers UV-531.
In some more preferred embodiment, the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat only contains PLA and poly- both polymer of furandicarboxylic acid butanediol ester.That is, the feelings of the third polymer are being added without
Under condition, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin is as gas barrier material just simultaneously to oxygen
Gas, carbon dioxide and vapor have good barrier.
In some more preferred embodiment, the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat only contains PLA and poly- both polymer of furandicarboxylic acid butanediol ester.That is, the feelings of the third polymer are being added without
Under condition, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin is as gas barrier material just simultaneously to oxygen
Gas, carbon dioxide and vapor have good barrier.
For example, when the biological poly furandicarboxylic acid butanediol ester modified polylactic resin includes the poly- furans two of 30wt%
During formic acid butanediol ester, it is better than the polyethylene terephthalate as Coke bottle for the barrier of carbon dioxide
(PET, 1.50cm3/m2·d·atm)。
In some more preferred embodiment, the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat is mainly blended in 175~200 DEG C of banburyings with antioxidant and auxiliary agent by PLA and poly- furandicarboxylic acid butanediol ester and formed.
In some more preferred embodiment, the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat mainly by 80~100 DEG C of abundant dried PLAs and poly- furandicarboxylic acid butanediol ester with antioxidant and auxiliary agent in temperature
Spend for 175~200 DEG C and mixing speed be 30~70 revs/min under conditions of banburying be blended 4~8 minutes and formed.
In some more preferred embodiment, the biological poly furandicarboxylic acid butanediol ester polydactyl acid tree
Fat squeezes after mainly being mixed by dry PLA, poly- furandicarboxylic acid butanediol ester with antioxidant and auxiliary agent through double screw extruder
Go out to be granulated and formed, the processing conditions of the double screw extruder includes：One area's temperature is 150~170 DEG C, and two area's temperature are 170
~200 DEG C, three area's temperature are 175~200 DEG C, and four area's temperature are 175~200 DEG C, and head temperature is 175~195 DEG C, and main frame turns
Speed is 40~100rpm.
Foregoing biological poly furandicarboxylic acid butanediol ester modified polylactic resin is made up of full bio-based polyester, and it is not
Petroleum resources are relied on, are a kind of renewable, environmentally friendly resin (i.e. a kind of full bio-based, environment-friendly blend alloys), can
For preparing film, sheet material, sheet material, foaming and injection-molded plastic product etc..
In order that the narration of disclosure of the present invention is more detailed with complete, below for the present invention embodiment aspect with
Specific embodiment proposes illustrative description；But this not implements or the unique forms with the specific embodiment of the invention.With
Lower disclosed each embodiment, beneficial in the case of can be mutually combined or substitute, can also add others in one embodiment
Embodiment, and without further record or explanation.
Poly- furandicarboxylic acid butanediol ester (PBF) refers to used by following examples and comparative example
US20130171397A1 patent, its structural formula are as follows：
And its specific preparation process is as follows：
237g (1.5mol) FDCA, 490g (5.4mol) fourth are added in clean 1L stainless steel cauldrons
Glycol, 0.24g (0.7mmol) butyl titanate, under nitrogen protection, 190~230 DEG C of esterifications 4 hours；Then, extract out
Unnecessary solution, 0.5g (1.5mmol) butyl titanate is added, at 230~245 DEG C, vacuumizes lower polycondensation reaction 2h；
The PBF that polymerization obtains is taken out by reactor bottom, and is put into tank and cools down, is placed in 60 DEG C of vacuum drying chambers afterwards
Interior drying 12 hours, obtain that brown PBF powder 200g can be obtained after crushing.The PBF is in the tetrachloro that 30 DEG C of concentration are 0.5g/dL
Ethane/phenol (volume ratio about 1:1) inherent viscosity of measure is 1.03dL/g in.
Embodiment 1：
By the polylactic acid PLA (4032D) after 90 DEG C of vacuum drying 2h, foregoing PBF, antioxidant AT1010, lubricant
PETS-3, UV absorbers UV-531 are 93.6 in mass ratio:5:0.3:0.6:0.5 in Brabender torque rheometers
Banburying is carried out, 185 DEG C of mixing temperature, 50 revs/min of rotating speed, mixing time 6 minutes, obtains blend.
The blend is molded at 185 DEG C to 200 μm or so of film, at room temperature, will the film cut after be put into
The barrier test of oxygen and carbon dioxide is carried out in gas barrier tester (VAC-V2, Labthink).Again will after having tested
Film, which is further cut out, to be put into vapor water barriers tester (W3/060, Labthink), and vapor resistance is carried out at 35 DEG C
Every test.
Embodiment 2：With embodiment 1, difference is the preparation technology of the present embodiment：PLA, PBF, antioxidant AT1010, profit
Lubrication prescription PETS-3, UV absorbers UV-531 mass ratio are 88.5:10:0.4:0.6:0.5.
Embodiment 3：With embodiment 1, difference is the preparation technology of the present embodiment：PLA, PBF, antioxidant AT1076, profit
Lubrication prescription PETS-3, UV absorbers UV-531 mass ratio are 83.4:15:0.5:0.6:0.5.
Embodiment 4：With embodiment 1, difference is the preparation technology of the present embodiment：PLA, PBF, antioxidant AT1010, profit
Lubrication prescription PETS-4, UV absorbers UV-531 mass ratio are 78.3:20:0.6:0.6:0.5, molding temperature is 190 DEG C.
Embodiment 5：With embodiment 1, difference is the preparation technology of the present embodiment：PLA, PBF, antioxidant AT1076, profit
Lubrication prescription PETS-4, UV absorbers UV-531 mass ratio are 67.9:30:0.8:0.7:0.6, molding temperature is 192 DEG C.
Comparative example 1：PLA pure materials are molded into 200 μm or so of film, at room temperature, gas are put into after PLA films are cut
The barrier test of oxygen and carbon dioxide is carried out in body barrier tester (VAC-V2, Labthink).Again will be thin after having tested
Film, which is further cut out, to be put into vapor water barriers tester (W3/060, Labthink), and vapor water barriers are carried out at 35 DEG C
Test
Comparative example 2：PBF pure materials are molded into 200 μm or so of film, at room temperature, gas are put into after PBF films are cut
The barrier test of oxygen and carbon dioxide is carried out in body barrier tester (VAC-V2, Labthink).Again will be thin after having tested
Film, which is further cut out, to be put into vapor water barriers tester (W3/060, Labthink), and vapor water barriers are carried out at 35 DEG C
Test.
Comparative example 3：The preparation of the present embodiment and method of testing are with embodiment 1, and difference is to select PET pure materials, extrusion grade,
The processing temperature of banburying and molding is 260 DEG C.
Comparative example 4：The preparation of the present embodiment and method of testing are to select HDPE (high-density polyethylenes with embodiment 1, difference
Alkene) pure material, extrusion grade, banburying and the processing temperature being molded are 200 DEG C.
Comparative example 5：The preparation of the present embodiment and method of testing are to select LDPE (low density polyethylenes with embodiment 1, difference
Alkene) pure material, extrusion grade, banburying and the processing temperature being molded are 180 DEG C.
Above-described oxygen and carbon dioxide barrier properties are tested according to GB/T 1038-2000, vapor water barriers
Performance is tested according to GB/T 1037-1988.
The embodiment 1-8 of table 1 and comparative example 1-2 obtains the gas barrier property test result of film article
Note：Because PET is usually used in soda packaging, vapor water barriers performance is not surveyed.
As it can be seen from table 1 in previous embodiment 1-8, each biological poly furandicarboxylic acid butanediol ester polydactyl acid
The barrier property of resin (being also regarded as PLA/PBF blends) improves with the increase of PBF contents, and highest can reach oxygen
Transmitance (OTR)：0.16cm3/m2Datm, carbon dioxide transmission rate (COTR)：0.13cm3/m2Datm, vapor
Vapor transfer rate：10g/m2·d.Therefore, the poly- furandicarboxylic acid butanediol ester modified polylactic resin of aforementioned biological base has excellent
Gas barrier property, it can be widely applied to the fields such as medicine, food, beverage packaging.
It should be appreciated that the embodiment shown in described above can not parse the fixed design philosophy of the invention that is limited.In the present invention
Technical field in hold identical skill can by the present invention technical thought change is improved in the form of various, it is such
Improvement and change are interpreted as belonging in protection scope of the present invention.
Claims (10)
1. purposes of the biological poly furandicarboxylic acid butanediol ester modified polylactic resin in gas barrier material is prepared, described
Modified polylactic resin includes 67~95wt% of PLA, 4~30wt% of poly- furandicarboxylic acid butanediol ester, and antioxidant 0.5~
0.5~2wt% of 1wt% and auxiliary agent.
2. purposes according to claim 1, it is characterised in that：The biological poly furandicarboxylic acid butanediol ester is modified poly-
Application of the lactic acid resin as gas barrier material.
3. purposes according to claim 1, it is characterised in that：The gas that the gas barrier material can obstruct includes oxygen
Any one in gas, carbon dioxide and vapor or two or more combinations.
4. purposes according to claim 3, it is characterised in that：At room temperature, the biological poly furandicarboxylic acid fourth two
Alcohol ester modified polylactic resin as gas barrier film for the transmitance of oxygen, carbon dioxide be respectively 0.05~
1.10cm3/m2Datm and 0.12~0.72cm3/m2·d·atm；And/or under conditions of temperature is 35 DEG C, the life
The poly- furandicarboxylic acid butanediol ester modified polylactic resin of thing base is 7.3 for the transit dose of vapor as gas barrier film
~19.6g/m2·d。
5. purposes according to claim 1, it is characterised in that：The biological poly furandicarboxylic acid butanediol ester is modified poly-
Lactic acid resin as gas barrier material packaging, cosmetic, seperation film, medicine or optical field application.
6. purposes according to claim 5, it is characterised in that：The biological poly furandicarboxylic acid butanediol ester is modified poly-
Purposes of the lactic acid resin as gas barrier material in preparing packaging material or improving the gas barrier property of packaging material.
7. according to the purposes any one of claim 1-3, it is characterised in that：The shape of the gas barrier material includes
Membranaceous, sheet, tabular or bulk.
8. purposes according to claim 6, it is characterised in that：The packaging material includes box, bottle, bag, tank or preservative film.
9. purposes according to claim 1, it is characterised in that：
The PLA uses fusing point, and for 150~180 DEG C of extrusion grade PLA, weight average molecular weight is 40,000~150,000；
And/or the poly- furandicarboxylic acid butanediol ester is selected from the bio-based polyester containing furan nucleus diacid and butanediol structure,
And the inherent viscosity of the bio-based polyester is 0.8~1.2；
Preferably, the mol ratio of the furan nucleus diacid and butanediol structure is 1：1~4；
And/or the antioxidant includes phenols, phosphorous acid esters, containing any one in sulphur ester antioxidant or two or more
Combination；
And/or the auxiliary agent includes any one in lubricant, heat stabilizer, UV absorbers or two or more groups
Close；
Preferably, the biological poly furandicarboxylic acid butanediol ester modified polylactic resin includes the poly- furandicarboxylic acids of 30wt%
Butanediol ester；
Preferably, the modified polylactic resin is mainly by PLA and poly- furandicarboxylic acid butanediol ester and antioxidant and auxiliary agent
It is blended to be formed in 175~200 DEG C of banburyings；
It is further preferred that the modified polylactic resin is mainly by 80~100 DEG C of abundant dried PLAs and poly- furan
Dioctyl phthalate butanediol ester and antioxidant and auxiliary agent mutter in the condition that temperature is 175~200 DEG C and mixing speed is 30~70 revs/min
Lower banburying is blended 4~8 minutes and formed.
It is further preferred that the modified polylactic resin mainly by dry PLA, poly- furandicarboxylic acid butanediol ester with
Formed after antioxidant and auxiliary agent mixing through double screw extruder extruding pelletization, the processing conditions of the double screw extruder includes：
One area's temperature is 150~170 DEG C, and two area's temperature are 170~200 DEG C, and three area's temperature are 175~200 DEG C, and four area's temperature are 175
~200 DEG C, head temperature is 175~195 DEG C, and engine speed is 40~100rpm.
10. the purposes according to any one of claim 1-6,8-9, it is characterised in that：The biological poly furans diformazan
Sour butanediol ester modified polylactic resin only contains PLA and poly- both polymer of furandicarboxylic acid butanediol ester.
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| CN201610564395.7A CN107619585A (en) | 2016-07-14 | 2016-07-14 | The purposes of biological poly furandicarboxylic acid butanediol ester modified polylactic resin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929440A (en) * | 2018-08-30 | 2018-12-04 | 中国科学院宁波材料技术与工程研究所 | Blocked copolyester, preparation method and barrier film, barrier bottle |
| CN109679300A (en) * | 2018-11-24 | 2019-04-26 | 中国科学院宁波材料技术与工程研究所 | Thermoplastic polyester complex and preparation method thereof, product |
| CN114957946A (en) * | 2022-06-09 | 2022-08-30 | 吉林建筑大学 | Modified polylactic acid-based material and application thereof |
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| CN102731974A (en) * | 2011-04-11 | 2012-10-17 | 佳能株式会社 | Plastic film |
| CN103146161A (en) * | 2013-03-29 | 2013-06-12 | 浙江海正生物材料股份有限公司 | Modified polylactic resin composition as well as preparation method and application thereof |
| CN105400165A (en) * | 2015-12-11 | 2016-03-16 | 中国科学院宁波材料技术与工程研究所 | Bio-based polyester modified polylactic resin, preparation method and processing forming method |
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| CN101362850A (en) * | 2007-08-06 | 2009-02-11 | 佳能株式会社 | Resin composition and molded article |
| CN102731974A (en) * | 2011-04-11 | 2012-10-17 | 佳能株式会社 | Plastic film |
| CN103146161A (en) * | 2013-03-29 | 2013-06-12 | 浙江海正生物材料股份有限公司 | Modified polylactic resin composition as well as preparation method and application thereof |
| CN105400165A (en) * | 2015-12-11 | 2016-03-16 | 中国科学院宁波材料技术与工程研究所 | Bio-based polyester modified polylactic resin, preparation method and processing forming method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929440A (en) * | 2018-08-30 | 2018-12-04 | 中国科学院宁波材料技术与工程研究所 | Blocked copolyester, preparation method and barrier film, barrier bottle |
| CN109679300A (en) * | 2018-11-24 | 2019-04-26 | 中国科学院宁波材料技术与工程研究所 | Thermoplastic polyester complex and preparation method thereof, product |
| CN109679300B (en) * | 2018-11-24 | 2021-11-30 | 中国科学院宁波材料技术与工程研究所 | Thermoplastic polyester compound and preparation method and product thereof |
| CN114957946A (en) * | 2022-06-09 | 2022-08-30 | 吉林建筑大学 | Modified polylactic acid-based material and application thereof |
| CN114957946B (en) * | 2022-06-09 | 2024-01-30 | 吉林建筑大学 | Modified polylactic acid-based material and application thereof |
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