CN106519607A - Polylactic acid/random copolymerization polypropylene alloy biodegradable material and preparation method thereof - Google Patents
Polylactic acid/random copolymerization polypropylene alloy biodegradable material and preparation method thereof Download PDFInfo
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- CN106519607A CN106519607A CN201510569403.2A CN201510569403A CN106519607A CN 106519607 A CN106519607 A CN 106519607A CN 201510569403 A CN201510569403 A CN 201510569403A CN 106519607 A CN106519607 A CN 106519607A
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- random copolymerization
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Abstract
The invention relates to a random copolymerization PP (Polypropylene)/polylactic acid blend alloy biodegradable material and a preparation method of the biodegradable material. A blend is prepared from the following components by weight: 10 percent to 30 percent of random copolymerization PP, 50 percent to 90 percent of polylactic acid and 5 percent to 15 percent of a compatilizer. The preparation method of the biodegradable material comprises the following steps: carrying out drying treatment on the polylactic acid for 1 hour to 2 hours; uniformly blending the random copolymerization PP and the compatilizer into a high-speed mixer at a rotary speed of 800rpm to 1500rpm; melting, blending and granulating the mixed blend through adopting a double-screw extruder and controlling the temperature to be 190 DEG C to 210 DEG C; after drying grains, mixing the grains with the polylactic acid again at a high speed; extruding and granulating; then carrying out injection molding to process the grains into sheet-shaped products. A polylactic acid/random copolymerization PP blend alloy sheet material product prepared by the method has relatively good biodegradability, and pollution to environments, caused by a non-degradable plastic component, namely the random copolymerization PP, is avoided.
Description
Technical field
The present invention is to improve or solve the technical problem of non biodegradable polymer material biodegradability.
It is related to enter by a kind of Biodegradable Material Polylactic Acid and a kind of non-biodegradable material atactic copolymerized polypropene
The method that row is blended and prepares PLA/atactic copolymerized polypropene blend alloy biodegradation material.
Background technology
The range of application of macromolecular material and consumption are rapidly increasing, but most macromolecular materials give up
After abandoning the Nature degradation speed slowly, serious environment pollution.In recent years, as waste plastic is difficult
To degrade, the white pollution for bringing is on the rise, and causes global extensive concern, and takes some protections
And restriction, such as countries in the world have put into effect the correlation for limiting or prohibitting the use of non-degradable plastic packing article successively
Regulation.So, research and develop the technical problem that degradable high polymer material becomes in the urgent need to address at present.
At present, the species of degradable high polymer material and consumption are few, and PLA is one of which combination property
Preferable biodegradable polymer.By preparing Biodegradable high-molecular with polylactic acid blend or copolymerization
Material alloys are a kind of effective ways for preparing biodegradated polymer materal, also achieve some achievements and enter
Exhibition.But there is significant limitation at present.Than if preparing the conjunction of complete biodegradable macromolecule with polylactic acid blend
Another kind of macromolecular material component of golden material itself must also have biodegradability.So PLA is biological
Degraded blend alloy material its range of application is extremely limited.And adopt other macromolecular material monomers and gather
The method that lactic acid monomer carries out the method for copolymerization to prepare biodegradable polylactic acid alloy material, which is relatively costly,
And can also be very restricted with other high polymer monomer species of PLA copolymerization.
The present invention is prepared by being limited for current biodegradable polylactic acid alloy material, using one kind completely not
Same thinking and method, are blended with PLA with atactic copolymerized polypropene.By adding compatilizer, adopt
Blending technology, prepares PLA and the preferable blend alloy of atactic copolymerized polypropene compatibility.Select random copolymerization
Polypropylene is because its amorphous or low-crystallinity, can be preferably compatible with PLA, compatible solving by being blended
Non-biodegradation macromolecular material atactic copolymerized polypropene becomes a difficult problem for biodegradated polymer materal.
The content of the invention：
The basic thought adopted for the present invention and method, the purpose of the present invention are additions after addition compatilizer
Blend alloy is prepared in PLA and atactic copolymerized polypropene.A kind of atactic copolymerized polypropene that contains is provided with poly- breast
Biodegradation material of acid and preparation method thereof, solves a biodegradable difficult problem for non-degradable plastics, so as to solve
All types of such conjunction such as the white pollution that plastics are caused to environment, the present invention applicable film, sheet material, tubing
Golden macromolecular material.
In order to achieve the above object, the present invention is adopted the following technical scheme that：It is a kind of to contain atactic copolymerized polypropene
With the biodegradation material of PLA, mixed by following raw materials in proportion, the ratio is weight ratio：
Random copolymerization PP be 10%～30%, PLA 50%～90%, compatilizer be 5%～
15%.
Best-of-breed technology scheme, is mixed by following ratio：
It is 7% that random copolymerization PP is 15, PLA 78%, compatilizer.
Random copolymerization PP molecular weight described in technical scheme is 2.5 × 104～8 × 104。
PLA described in technical scheme is constituted for the PLLA that weight average molecular weight is 8 ten thousand to 15 ten thousand.
Compatilizer described in technical scheme is one of following or its mixture：SEBS-g-MA and maleic acid
Acid anhydride graft polypropylene.
Preparation method is comprised the following steps：
(1) drying and processing 1-2 hours are carried out in advance to polylactic acid raw material, is closed stand-by；
(2) atactic copolymerized polypropene compatilizer is blended uniformly in high-speed mixer；Mixing temperature is at 80～100 DEG C.
(3) mixture in step 2 extruding pelletization is dried in double screw extruder, the temperature of granulation exists
Between 190-210 DEG C；
(4) mixed material for obtaining step 3 is blended in high-speed mixer uniformly with PLA again；Mixing temperature exists
80～100 DEG C.
(5) by the mixture in step 4 in double screw extruder extruding pelletization, the temperature of granulation is at 190-220 DEG C
Between；
(6) it is molded after the particle drying for obtaining extruding pelletization again, makes alloy sheet material or other products.Injection
Front drying temperature is between 100～120 DEG C.
The technology adopted in implementing from above-mentioned technical proposal has following advantages compared with prior art：
(1) a kind of brand-new thinking and technology is used, by increasing PLA and other abiotic drops
The compatibility of depolymerization compound, using the compatibility and biodegradability of PLA breaking and reduce other non-drops
The inter-molecular binding force of solution macromolecular material, so that improve and realize the biological drop of non-biodegradation high molecular component
Solution performance.This technology is applicable not only to nylon 6 material, it is contemplated that and solve other thermal plastic high polymers
A kind of effective method of a biodegradable difficult problem for material.
(2) main raw material(s) is biodegradable PLA and nonbiodegradable atactic copolymerized polypropene.
The shortcoming of the poor toughness of poly-lactic acid material can be solved.
(3) used product can be decomposed into water and carbon dioxide, biodegradation rate under field conditions (factors)
Hurry up, without producing white pollution, meet the requirement of environmental protection；
(4) production process can be automated with mechanization, and scale, industrialization, cost are more typically blended
Method and copolymerization method are cheap, and its applicability is greatly improved, and its wide market, demand are huge.
Specific embodiment
Embodiment 1
It is the mixed of 10%, PLA 85%, SEBS-g-MA5% proportionally to weigh atactic copolymerized polypropene
Close 10 kilograms of material.PLA is first carried out into drying and processing 1.5 hours, then by atactic copolymerized polypropene,
SEBS-g-MA is blended in the high-speed mixer that rotating speed is 800 revs/min uniformly, mixed material is added double
Melting extrusion granulation in screw extruder, extrusion temperature are 190～210 DEG C.By extruded material dry again with poly- breast
Acid is blended uniformly in the high-speed mixer that rotating speed is 800 revs/min again, then adds twin-screw to squeeze again
Go out melting extrusion granulation in machine, extrusion temperature is 190～220 DEG C.Add after being extruded the drying materials for obtaining again
Enter and be molded by sheet material in injection machine.Then carry out natural degradation experiment.Natural degradation is tested according to GB
The regulation of GB/T20197-2006 is carrying out.Test result is：Biological decomposition rate is 65%, more than national regulations
>=60%.
Embodiment 2
Atactic copolymerized polypropene is weighed proportionally for 15%, PLA 78%, SEBS-g-MA and Malaysia
Anhydride-grafted polypropylene totally 7% 10 kilograms of compound.PLA is first carried out into drying and processing 1.5 hours, then
It is 800 revs/min by atactic copolymerized polypropene, SEBS-g-MA and maleic anhydride inoculated polypropylene in rotating speed
It is blended in high-speed mixer uniformly, mixed material is added into melting extrusion granulation in double screw extruder, extrusion temperature
Spend for 190～210 DEG C.Extruded material is dried again with PLA again in the high speed that rotating speed is 800 revs/min
Uniform, then melting extrusion granulation in addition double screw extruder again is blended in mixer, and extrusion temperature is
190～220 DEG C.It is added to after being extruded the drying materials for obtaining again in injection machine and is molded by sheet material.Then enter
Row natural degradation is tested.Natural degradation tests according to the regulation of GB GB/T20197-2006 to carry out.Test knot
It is really：Biological decomposition rate be 69%, more than national regulations >=60%.
Embodiment 3
Atactic copolymerized polypropene is weighed proportionally for 30%, PLA 55%, SEBS-g-MA and Malaysia
Anhydride-grafted polypropylene totally 15% 10 kilograms of compound.PLA is first carried out into drying and processing 1.5 hours, so
Afterwards by atactic copolymerized polypropene, SEBS-g-MA and maleic anhydride inoculated polypropylene rotating speed be 800 revs/min
High-speed mixer in blending it is uniform, mixed material is added into melting extrusion granulation in double screw extruder, extrusion
Temperature is 190～210 DEG C.Extruded material is dried again with PLA again in the height that rotating speed is 800 revs/min
Uniform, then melting extrusion granulation in addition double screw extruder again is blended in fast mixer, and extrusion temperature is
190～220 DEG C.It is added to after being extruded the drying materials for obtaining again in injection machine and is molded by sheet material.Then enter
Row natural degradation is tested.Natural degradation tests according to the regulation of GB GB/T20197-2006 to carry out.Test knot
It is really：Biological decomposition rate be 61%, more than national regulations >=60%.
The above, the only specific embodiment of the invention, but protection scope of the present invention is applicable for use with
Any scope of thinking of the present invention and method.Using in thinking of the present invention and method by reduce and break intermolecular
Active force carrys out the method for degraded macromolecular material within the scope of the present invention.Therefore, protection of the invention
Scope should be defined by the protection domain described in claim.
Claims (4)
1. the biodegradation material of a kind of PP containing random copolymerization and polylactic acid blend alloy, its principal character exist
In its invention thought and method, the i.e. present invention be by increase biodegradated polymer materal (PLA) with it is non-
Compatibility between biodegradated polymer materal (random copolymerization PP), using biodegradated polymer materal
Degrade to reduce and break non-biodegradation thermoplastic macromolecule material intermolecular force, by biodegradable height
Non-biodegradation high molecular component is broken by the degraded of molecular material component becomes individual molecule, so as to realize to non-
Biodegradable, the concrete described PLA/random copolymerization PP alloys biology of biodegradated polymer materal component
Degradable material is mainly obtained through melt blending by PLA, random copolymerization PP, compatilizer, its raw material by than
Example is mixed, and the ratio is weight ratio：Random copolymerization PP be 10%～30%, PLA 50%～
90%th, compatilizer is 5%～15%.
2. a kind of PP containing random copolymerization as claimed in claim 1 and polylactic acid blend alloy is biodegradable
In material, its bulking agent is one of following or its mixture：SEBS-g-MA and maleic anhydride inoculated polypropylene.
3. a kind of PP containing random copolymerization as claimed in claim 1 and polylactic acid blend alloy is biodegradable
Material, it is characterised in that described polypropylene is：Atactic copolymerized polypropene (amorphous polypropylene).
4. a kind of biology containing atactic copolymerized polypropene and polylactic acid blend alloy as claimed in claim 1
The preparation method of degradable material, it is characterised in that comprise the following steps：
(1) drying and processing 1-2 hours are carried out in advance to polylactic acid raw material, is closed stand-by；
(2) atactic copolymerized polypropene compatilizer is blended uniformly in high-speed mixer；Mixing temperature exists
80～100 DEG C；
(3) mixture in step 2 extruding pelletization is dried in double screw extruder, the temperature of granulation exists
Between 190-210 DEG C；
(4) mixed material for obtaining step 3 is blended in high-speed mixer uniformly with PLA again；Mixing temperature
Degree is at 80～100 DEG C；
(5) by the mixture in step 4 in double screw extruder extruding pelletization, the temperature of granulation exists
Between 190-220 DEG C；
(6) it is molded after the particle drying for obtaining extruding pelletization again, makes alloy sheet material or other products；
Before injection, drying temperature is between 100～120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510569403.2A CN106519607A (en) | 2015-09-09 | 2015-09-09 | Polylactic acid/random copolymerization polypropylene alloy biodegradable material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510569403.2A CN106519607A (en) | 2015-09-09 | 2015-09-09 | Polylactic acid/random copolymerization polypropylene alloy biodegradable material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108587093A (en) * | 2018-05-10 | 2018-09-28 | 甘肃汇投治沙科技股份有限公司 | Concave convex rod filled polypropylene polylactic acid degradable composite material and preparation method |
| CN109401246A (en) * | 2018-10-31 | 2019-03-01 | 安徽双平包装有限公司 | A kind of environment-protective food package bag material |
| CN111789285A (en) * | 2020-06-07 | 2020-10-20 | 湖北中烟工业有限责任公司 | Preparation method of polylactic acid cooling modified tow filter stick |
| CN113583349A (en) * | 2021-05-18 | 2021-11-02 | 会通新材料股份有限公司 | Environment-friendly polypropylene composite material and preparation method and application thereof |
-
2015
- 2015-09-09 CN CN201510569403.2A patent/CN106519607A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108587093A (en) * | 2018-05-10 | 2018-09-28 | 甘肃汇投治沙科技股份有限公司 | Concave convex rod filled polypropylene polylactic acid degradable composite material and preparation method |
| CN109401246A (en) * | 2018-10-31 | 2019-03-01 | 安徽双平包装有限公司 | A kind of environment-protective food package bag material |
| CN111789285A (en) * | 2020-06-07 | 2020-10-20 | 湖北中烟工业有限责任公司 | Preparation method of polylactic acid cooling modified tow filter stick |
| CN113583349A (en) * | 2021-05-18 | 2021-11-02 | 会通新材料股份有限公司 | Environment-friendly polypropylene composite material and preparation method and application thereof |
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