CN105713361B - Based on epoxidized thermoplastic elastic body toughening shock resistance polylactic acid and preparation method thereof - Google Patents
Based on epoxidized thermoplastic elastic body toughening shock resistance polylactic acid and preparation method thereof Download PDFInfo
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- CN105713361B CN105713361B CN201610211090.8A CN201610211090A CN105713361B CN 105713361 B CN105713361 B CN 105713361B CN 201610211090 A CN201610211090 A CN 201610211090A CN 105713361 B CN105713361 B CN 105713361B
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- 239000004626 polylactic acid Substances 0.000 title claims abstract description 97
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 96
- 230000035939 shock Effects 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001169 thermoplastic Polymers 0.000 title abstract description 6
- 239000004416 thermosoftening plastic Substances 0.000 title abstract description 6
- 238000006735 epoxidation reaction Methods 0.000 claims abstract description 25
- 229920006132 styrene block copolymer Polymers 0.000 claims abstract description 15
- 229920006000 epoxidized styrene-butadiene-styrene block copolymer Polymers 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 229920000578 graft copolymer Polymers 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 6
- 238000007670 refining Methods 0.000 claims 2
- 229920002725 thermoplastic elastomer Polymers 0.000 abstract description 28
- 238000002156 mixing Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 11
- 229920001971 elastomer Polymers 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 abstract description 2
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 abstract description 2
- 229920001400 block copolymer Polymers 0.000 abstract 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- SCKXCAADGDQQCS-UHFFFAOYSA-N Performic acid Chemical compound OOC=O SCKXCAADGDQQCS-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- SYWDWCWQXBUCOP-UHFFFAOYSA-N benzene;ethene Chemical group C=C.C1=CC=CC=C1 SYWDWCWQXBUCOP-UHFFFAOYSA-N 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 238000012661 block copolymerization Methods 0.000 description 1
- SLFMSPPUYRGPDD-UHFFFAOYSA-N buta-1,3-diene;2-phenyloxirane;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C1OC1C1=CC=CC=C1 SLFMSPPUYRGPDD-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229920000587 hyperbranched polymer Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
-
- 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
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/024—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G
- C08G81/027—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G containing polyester or polycarbonate sequences
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of shock resistance polylactic acid and preparation method thereof, this method carries out toughening modifying to polylactic acid by the method for mixing blend graft using epoxidized thermoplastic elastomer, polylactic acid and epoxidized thermoplastic elastomer are put into mixer, it is in terms of 100 parts by shock resistance polylactic acid quality, wherein polylactic acid mass fraction is 70-95 parts, and epoxidized thermoplastic elastomeric mass score is 5-30 parts；Mixing time is 5-20min, and smelting temperature is 170-200 DEG C, and torque 40-80rpm obtains shock resistance polylactic acid；Epoxidized thermoplastic elastomer is selected from epoxidized styrene-butadiene-styrene block copolymer, epoxidized styrene-isoprene-phenylethene block copolymer, epoxidation vinyl benzene-isoprene/butadiene-styrene block copolymer；Compared with epoxidezed rubber, graft reaction technique, toughening effect are obviously improved.
Description
Technical field
The present invention relates to high impact poly lactic acid and preparation method thereof, it is related to using epoxidized thermoplastic elastomer to polylactic acid
Toughening modifying is carried out, field of high polymer material modification is belonged to.
Background technique
Polylactic acid is a kind of thermoplastic material commercially produced, and raw material sources are renewable, has good biology
Compatibility and biodegradable can gradually degrade in human body and natural environment, be ultimately breaks down into carbon dioxide and water.It is poly-
Lactic acid be in the future be most hopeful substitute conventional petroleum based high molecular material a kind of biomaterial, be widely used in medical treatment, pharmacy,
The fields such as agricultural, packaging.Polylactic acid intensity with higher and modulus, but the toughness of polylactic acid is poor, it is certain requiring
It is restricted in the application field of suppleness.In order to improve the toughness of general polylactic acid, to widen its use scope, in recent years
The research of polylactic acid toughening modifying is like a raging fire.Rubber and plastic is the effective way for improving polylactic acid shock resistance, but is used
The method of rubber plastic blend is difficult to well solve the control accurate of the two compatibility, and chemical grafting method can be more efficiently
Rubber is improved to the toughening effect of polylactic acid.Shock resistance polylactic acid disclosed in this invention, toughened matrix select epoxidation thermoplastic
Property elastomer, due to thermoplastic elastomer (TPE) have can be thermoformed molding characteristic, can be well close with polylactic acid
Hybrid reaction in mill, effectively improves grafting efficiency, and compared with epoxidezed rubber, graft reaction technique, toughening effect are bright
It is aobvious to improve.
Summary of the invention
The object of the present invention is to provide a kind of shock resistance polylactic acid and preparation method thereof, using epoxidized thermoplastic elastomer
Toughening modifying is carried out to polylactic acid by the method for mixing blend graft, shock resistance polylactic acid is polylactic acid and epoxidized thermoplastic
The graft polymers of elastomer.
A kind of shock resistance polylactic acid, it is characterised in that: shock resistance polylactic acid is polylactic acid and epoxidized thermoplastic elastomer
Graft polymers, each component ratio in shock resistance polylactic acid is in terms of 100 parts, wherein epoxidation by shock resistance polylactic acid quality
The mass fraction of thermoplastic elastomer (TPE) is 5-30 parts, remaining is polylactic acid；It is poly- that polylactic acid is selected from l-polylactic acid, D- polylactic acid, DL-
The mixture of one or more of lactic acid；Polylactic acid can be homopolymer or copolymer, can be linear structure, star structure
Or branched structure；The number-average molecular weight of polylactic acid is 5-50 ten thousand, preferably 10-30 ten thousand.Epoxidized thermoplastic elastomer is selected from ring
Styrene oxide-butadiene-styrene block copolymer (SBS), epoxidized styrene-isoprene-phenylethene block copolymerization
In object (SIS), epoxidation vinyl benzene-isoprene/butadiene-styrene block copolymer (SI/BS) thermoplastic elastomer (TPE)
One or more of mixtures, epoxidized thermoplastic elastomer can have linear structure, star structure or branched structure；Epoxy
Change one of thermoplastic elastomer (TPE) preferably linear or star epoxidation vinyl benzene-butadiene-styrene block copolymer (SBS)
Or several mixture；The epoxidation degree molar percentage of epoxidized thermoplastic elastomer is 3-60%, preferably 10-40%；
The number-average molecular weight of epoxidized thermoplastic elastomer is 5-60 ten thousand, preferably 10-30 ten thousand.
The preparation method of above-mentioned shock resistance polylactic acid, it is characterised in that: put polylactic acid and epoxidized thermoplastic elastomer
Enter in mixer, is in terms of 100 parts by shock resistance polylactic acid quality, wherein the mass fraction of epoxidized thermoplastic elastomer is 5-30
Part, the mass fraction of polylactic acid is 70-95 parts；Mixing time is 5-20min, and smelting temperature is 170-200 DEG C, torque 40-
80rpm obtains shock resistance polylactic acid.
The invention has the following advantages that polylactic acid shock resistance significantly improves, connect by epoxidized thermoplastic elastomer
Branch polydactyl acid, thermoplastic elastomer (TPE) dosage is few, toughness improves greatly, and shock resistance polylactic acid shows as apparent ductile rupture,
The biodegradable characteristic of polylactic acid is kept well；Smelting graft method for toughening equipment is simple, efficiently easy, is produced into
This cheap, application value with higher.Compared with epoxidezed rubber plasticizing polylactic acid, epoxidized thermoplastic elastomer tool
There is the molding characteristic of thermoplastic processing, be more easier uniformly to mix in mixer with polylactic acid, improve grafting efficiency, shock resistance is poly-
The processing performance of lactic acid significantly improves.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that the present embodiment is served only for pair
The present invention is further described, and should not be understood as the limitation to invention protection scope, and person skilled in art can basis
The content of foregoing invention makes some nonessential modifications and adaptations.Epoxidized thermoplastic elastomer is using classical formic acid/mistake
The preparation of hydrogen oxide original position peroxyformic acid method, the epoxidizing method of thermoplastic elastomer (TPE) and the epoxidation of epoxidized thermoplastic elastomer
Test method is spent referring to document: Zhang Hongxia, the research of butadiene/isoprene/styrene star pectination hyper branched polymer, greatly
Couple very much in love work University Ph.D. Dissertation (2009)；The preparation method of D- polylactic acid and DL- polylactic acid is referring to document: Song Ping, gathers cream
Acid crystal and melting behavior and nucleating agent regulate and control Study on Crystallization, Dalian University of Technology Ph.D. Dissertation (2014).
Embodiment 1
Take 90 parts of l-polylactic acid (U.S. Natureworks Products 4032D), linear epoxidized styrene-butadiene-
(SBS is the SBS LG501 of LG Corp of South Korea production to styrene block copolymer SBS, 36%) epoxidation degree molar percentage is
10 parts, by polylactic acid and epoxidized SBS together the mixing 10min in mixer, smelting temperature is 175 DEG C, torque 40rpm,
Anti-impact polylactic acid is obtained, Izod impact strength is 198.9J/m, elongation at break 218.8%；In comparison, l-polylactic acid
The Izod impact strength of 4032D is only 29.9J/m, elongation at break 3.5%；And l-polylactic acid 4032D is in identical proportion
Under the conditions of with SBS LG501 blending and modifying, the Izod impact strength for obtaining toughening product is only 51.9J/m, and elongation at break is only
It is 10.5%；As it can be seen that more significant using epoxidized SBS LG501 toughening effect.
Embodiment 2
Take 80 parts of l-polylactic acid (U.S. Natureworks Products 4032D), linear epoxidized styrene-butadiene-
(SBS is the SBS LG501 of LG Corp of South Korea production to styrene block copolymer SBS, 36%) epoxidation degree molar percentage is
20 parts, by polylactic acid and epoxidized SBS together the mixing 15min in mixer, smelting temperature is 180 DEG C, torque 80rpm,
Anti-impact polylactic acid is obtained, Izod impact strength is 795.5J/m.
Embodiment 3
Take 70 parts of l-polylactic acid (U.S. Natureworks Products 4032D), linear epoxidized styrene-butadiene-
(SBS is the SBS LG501 of LG Corp of South Korea production to styrene block copolymer SBS, 36%) epoxidation degree molar percentage is
30 parts, by polylactic acid and the linear SBS of epoxidation together the mixing 20min in mixer, smelting temperature is 195 DEG C, and torque is
70rpm, obtains anti-impact polylactic acid, and Izod impact strength is 891.0J/m.
Embodiment 4
Take 90 parts of l-polylactic acid (U.S. Natureworks Products 4032D), star epoxidized styrene-butadiene-
(SBS is Yanshan Petrochemical Products SBS 4303 to styrene block copolymer SBS, and epoxidation degree molar percentage is 26%) 10
Part, by polylactic acid and epoxidized SBS together the mixing 5min in mixer, smelting temperature is 170 DEG C, and torque 60rpm is obtained
Anti-impact polylactic acid, Izod impact strength are 114.2J/m.
Embodiment 5
Take 95 parts of l-polylactic acid (U.S. Natureworks Products 4032D), linear epoxidation vinyl benzene-isoamyl two
(Yueyang SIS petro-chemical corporation product SIS 1105, epoxidation degree molar percentage are 12%) 5 to alkene-styrene block copolymer SIS
Part, by polylactic acid and epoxidation SIS together the mixing 10min in mixer, smelting temperature is 200 DEG C, and torque 80rpm is obtained
To anti-impact polylactic acid, Izod impact strength is 56.0J/m.
Embodiment 6
Taking DL- polylactic acid, (Dalian University of Technology laboratory provides, and number-average molecular weight is 17.5 ten thousand, molecular weight distributing index
It is 1.85) 90 parts, (SBS is Beijing Yanshan Petrochemical Company to linear epoxidized styrene-butadiene-styrene block copolymer SBS
SBS1401 is provided, epoxidation degree molar percentage is 28%) 10 parts, and polylactic acid and epoxidized SBS is close in mixer together
10min is refined, smelting temperature is 170 DEG C, torque 60rpm, obtains anti-impact polylactic acid, and Izod impact strength is 148.7J/m.
Embodiment 7
Taking D- polylactic acid, (Dalian University of Technology laboratory provides, and number-average molecular weight is 18.6 ten thousand, and molecular weight distributing index is
1.91) 90 parts, (SBS is mentioned styrene block copolymer SBS linear epoxidized styrene-butadiene-for Beijing Yanshan Petrochemical Company
For SBS1401, epoxidation degree molar percentage is 28%) 10 parts, by polylactic acid and the epoxidized SBS mixing in mixer together
10min, smelting temperature are 170 DEG C, torque 60rpm, obtain anti-impact polylactic acid, and Izod impact strength is 98.5J/m.
Embodiment 8
Take 90 parts of l-polylactic acid (U.S. Natureworks Products 4032D), linear epoxidation vinyl benzene-isoamyl two
(Dalian University of Technology laboratory provides alkene/butadiene-styrene block copolymer SI/BS, and number-average molecular weight is 18.1 ten thousand, benzene
Ethylene contents mass fraction is 30%, and isoprene content mass fraction is 35%, and butadiene content mass fraction is 35%；Ring
Oxidizability molar percentage is 30%) 10 parts, by polylactic acid and epoxidation SI/BS together the mixing 20min in mixer, mixing
Temperature is 195 DEG C, torque 70rpm, obtains anti-impact polylactic acid, and Izod impact strength is 141.0J/m.
Claims (4)
1. a kind of shock resistance polylactic acid, it is characterised in that: shock resistance polylactic acid is l-polylactic acid and linear epoxidation vinyl benzene-fourth
The graft polymers of styrene block copolymer SBS, each component ratio in shock resistance polylactic acid, with shock resistance polylactic acid
Quality is 100 parts of meters, wherein linear epoxidized styrene-butadiene-styrene block copolymer SBS mass fraction is 20
Part, remaining is l-polylactic acid；Linear epoxidized styrene-butadiene-styrene block copolymer SBS epoxidation degree mole hundred
Divide than being 36%；The weight average molecular weight of l-polylactic acid is 210,000, linear epoxidized styrene-butadiene-styrene
The weight average molecular weight of object SBS is 120,000.
2. a kind of shock resistance polylactic acid, it is characterised in that: shock resistance polylactic acid is l-polylactic acid and linear epoxidation vinyl benzene-fourth
The graft polymers of styrene block copolymer SBS, each component ratio in shock resistance polylactic acid, with shock resistance polylactic acid
Quality is 100 parts of meters, wherein linear epoxidized styrene-butadiene-styrene block copolymer SBS mass fraction is 30
Part, remaining is l-polylactic acid；Linear epoxidized styrene-butadiene-styrene block copolymer SBS epoxidation degree mole hundred
Divide than being 36%；The weight average molecular weight of l-polylactic acid is 210,000, linear epoxidized styrene-butadiene-styrene
The weight average molecular weight of object SBS is 120,000.
3. the preparation method of shock resistance polylactic acid described in claim 1, it is characterised in that: by l-polylactic acid and linear epoxidation benzene
Ethylene-butadiene-styrene block copolymer SBS is put into mixer, by shock resistance polylactic acid quality be 100 parts in terms of, wherein
Linear epoxidized styrene-butadiene-styrene block copolymer SBS mass fraction is 20 parts, remaining is l-polylactic acid；It is close
The refining time is 15min, and smelting temperature is 180 DEG C, and torque 80rpm obtains shock resistance polylactic acid.
4. the preparation method of shock resistance polylactic acid described in claim 2, it is characterised in that: by l-polylactic acid and linear epoxidation benzene
Ethylene-butadiene-styrene block copolymer SBS is put into mixer, by shock resistance polylactic acid quality be 100 parts in terms of, wherein
Linear epoxidized styrene-butadiene-styrene block copolymer SBS mass fraction is 30 parts, remaining is l-polylactic acid；It is close
The refining time is 20min, and smelting temperature is 195 DEG C, and torque 70rpm obtains shock resistance polylactic acid.
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| CN107418168B (en) * | 2017-05-27 | 2020-02-18 | 大连理工大学 | Polylactic acid with high tensile toughness and preparation method thereof |
| CN110408012B (en) * | 2019-04-28 | 2021-10-08 | 青岛科技大学 | Preparation method of 1, 2-polybutadiene rubber toughening modified polylactic acid |
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