CN102153842B - Polylactic acid bioengineering plastic and preparation methods thereof - Google Patents
Polylactic acid bioengineering plastic and preparation methods thereof Download PDFInfo
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- CN102153842B CN102153842B CN2011100541723A CN201110054172A CN102153842B CN 102153842 B CN102153842 B CN 102153842B CN 2011100541723 A CN2011100541723 A CN 2011100541723A CN 201110054172 A CN201110054172 A CN 201110054172A CN 102153842 B CN102153842 B CN 102153842B
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- impact modifier
- polyactic acid
- polycarbonate
- plastics
- polylactic acid
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Abstract
The invention discloses a polylactic acid bioengineering plastic and preparation methods thereof. The plastic is prepared by direct extrusion after raw materials are blended or prepared by pressing after raw materials are blended and melted; and the plastic comprises the following raw materials in part by weight: 5 to 95 parts of polylactic acid, 4 to 90 parts of polycarbonate, and 1 to 50 parts of impact modifier. One preparation method comprises the following steps of: blending the polylactic acid, the polycarbonate and the impact modifier uniformly according to the weight, performing extrusion with an extruder, and then performing injection molding; and the other preparation method comprises the following steps of: blending the polylactic acid, the polycarbonate and the impact modifier uniformly according to the weight, then melting the mixture, and pressing and molding the mixture. By reasonably blending the polylactic acid, the polycarbonate and the impact modifier, the defects of the polylactic acid can be overcome, and the polylactic acid bioengineering plastic with high impact resistance, high ductility and high heat resistance is prepared.
Description
Technical field
The present invention relates to the engineering plastics technical field, specifically, relate to a kind of POLYACTIC ACID biotechnology plastics and preparation method thereof.
Background technology
Polylactic resin is a kind ofly to be converted into the macromolecular material that lactic acid, lactic acid obtain through polymerization by starch through biological fermentation; It has favorable biological degradability can; Enzyme effect eventual degradation through microorganisms in physical environment becomes inorganic substance such as water and carbonic acid gas, is reproducible environmentally friendly biodegradable plastic.In recent years, because the shortage of environmental requirement and petroleum resources, polylactic resin more and more receives people's attention.But because there are shortcomings such as poor toughness, heat-drawn wire is low, the processing temperature scope is narrower in polylactic resin, its application is very limited, and particularly requires to have higher toughness, stable on heating product scope.
For overcoming the shortcoming of polylactic resin; At present main means are through improving the toughness of polylactic resin with the softening agent blend; For example Granted publication number is that CN100532453C, denomination of invention are in the Chinese patent of " a kind of plastic foam sheet material of poly lactic acid as suction plastic and preparation method thereof "; A kind of poly lactic acid as suction plastic porous plastics and preparation method are disclosed, by forcing machine directly extrude, foaming and setting and preparing, comprise softening agent such as toughner, toughener in its feed composition; The anti-shock resistance of POLYACTIC ACID plastics is improved, is applicable to preparation poly lactic acid as suction plastic porous plastics.Though at present this type method of using softening agent can improve indivedual performances of POLYACTIC ACID plastics, still there is deficiency in its over-all properties, the needs of the product scope with high impact resistance, H.T. and high heat resistance of can't meeting the demands.
Summary of the invention
The technical problem that the present invention solved provides a kind of POLYACTIC ACID biotechnology plastics with high impact resistance, high ductibility and high heat resistance ability and preparation method thereof.
The technical scheme that the present invention adopted is: a kind of POLYACTIC ACID biotechnology plastics, and obtain by directly extruding after the raw material blend or obtain by compacting after the raw materials melt blend, its feed composition proportioning by weight is following:
5～95 parts of polylactic resin,
4～90 parts of polycarbonate,
1～50 part of anti-impact modifier;
Said anti-impact modifier is the multipolymer anti-impact modifier, and said multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio:
A. vinyl monomer 10～92%,
B. general formula is CH
2=CR
1Olefinic monomer 5～80%,
C. general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer 0.4～30%;
Said R
1For containing the alkyl group of 3～9 carbon atoms, R
2For hydrogen or contain the alkyl group of 1～5 carbon atom, R
3Be glycidyl.
The preferred proportion of said vinyl monomer is 15～90%.
Said general formula is CH
2=CR
1The preferred proportion of olefinic monomer be 8～70%.
Said general formula is CH
2=C (R
2) CO
2R
3The monomeric preferred proportion of alkenyl compound be 1～20%.
A kind of preparation method of POLYACTIC ACID biotechnology plastics may further comprise the steps:
(1) by metering polylactic resin, polycarbonate, anti-impact modifier are mixed;
(2) extrude with forcing machine, the temperature of forcing machine is controlled at 180～210 ℃;
(3) with the extruded stock injection moulding, injection pressure is 0.6～0.7MPa, and injection speed is 50～70 mm/second, and the mould temperature is 30～90 ℃.
A kind of preparation method of POLYACTIC ACID biotechnology plastics may further comprise the steps:
(1) by metering POLYACTIC ACID, polycarbonate, anti-impact modifier are mixed;
(2) with Banbury mixer melt blending 4～12 minutes, the melt blending temperature was controlled at 150～210 ℃;
(3) with the material compression moulding behind the melt blending, press temperature is controlled at 160～210 ℃.
The invention has the beneficial effects as follows:
1, the present invention is through rationally being mixed polylactic resin and polycarbonate, multipolymer anti-impact modifier, can overcome the defective that POLYACTIC ACID exists, prepare have high impact properties, the POLYACTIC ACID biotechnology plastics of high ductibility and high heat resistance.
2, POLYACTIC ACID biotechnology plastics of the present invention; Partly substitute traditional day by day exhausted petroleum with the POLYACTIC ACID that derives from renewable plant; Be a kind of environment-friendly material, compliance with environmental protection requirements pollutes, protects environment to have useful effect to reducing.
3, POLYACTIC ACID biotechnology plastics of the present invention are owing to have high impact properties, high ductibility and high heat resistance, can be widely used in fields such as electronic product such as mobile telephone, computer and trolley part.
Embodiment
Below in conjunction with specific embodiment the present invention is further specified:
Embodiment 1
95 parts of polylactic resin, 4 parts of polycarbonate, multipolymer anti-impact modifier are mixed for 1 part, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 10% vinyl monomer, 80% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 10% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Material after mixing is extruded through twin screw extruder, and the temperature of forcing machine is controlled at 180～210 ℃; With the extruded stock injection moulding, injection pressure is 0.6MPa, and injection speed is 50 mm/second, and the mould temperature is 30 ℃.The POLYACTIC ACID biotechnology plastics batten that injection moulding is processed carries out Mechanics Performance Testing; The result who obtains: the strong degree 57MPa that is that stretches, elongation at break is 175%, notched Izod impact strength be 49 kilojoules/square metre; Modulus in flexure is 2301MPa; Flexural strength is 55MPa, and (HDT 0.45MPa) is 92 ℃ to record heat-drawn wire.
Embodiment 2
95 parts of polylactic resin, 90 parts of polycarbonate, multipolymer anti-impact modifier are mixed for 50 parts, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 92% vinyl monomer, 5% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 3% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Material after mixing is extruded through twin screw extruder, and the temperature of forcing machine is controlled at 180～210 ℃, and with the extruded stock injection moulding, injection pressure is 0.7MPa, and injection speed is 70 mm/second, and the mould temperature is 90 ℃.The POLYACTIC ACID biotechnology plastics batten that injection moulding is processed carries out Mechanics Performance Testing; The result who obtains: tensile strength is 62MPa, and elongation at break is 269%, notched Izod impact strength be 51 kilojoules/square metre; Modulus in flexure is 2318MPa; Flexural strength is 63MPa, and (HDT 0.45MPa) is 95 ℃ to heat-drawn wire.
Embodiment 3
5 parts of polylactic resin, 90 parts of polycarbonate, multipolymer anti-impact modifier are mixed for 5 parts, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 50% vinyl monomer, 40% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 10% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Material after mixing is extruded through twin screw extruder, and the temperature of forcing machine is controlled at 180～210 ℃, and with the extruded stock injection moulding, injection pressure is 0.6MPa, and injection speed is 60 mm/second, and the mould temperature is 60 ℃.The POLYACTIC ACID biotechnology plastics batten that injection moulding is processed carries out Mechanics Performance Testing, the result who obtains: tensile strength is 55MPa, and elongation at break is 254%, notched Izod impact strength be 61 kilojoules/square metre, modulus in flexure is 2224MPa, flexural strength is 60MPa.(HDT 0.45MPa) is 127 ℃ to record heat-drawn wire.
Embodiment 4
With 55 parts of polylactic resin, 30 parts of polycarbonate, the multipolymer anti-impact modifier mixes for 15 parts, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 10% vinyl monomer, 60% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 30% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Place Banbury mixer to carry out melt blending 4 minutes mixture, the melt blending temperature is controlled at 150～210 ℃, and the material behind the melt blending is pressed into the thick thin slice of 4mm with oil press, and press temperature is 160 ℃; The POLYACTIC ACID biotechnology plastics print that obtains of compacting carries out Mechanics Performance Testing, the result who obtains: tensile strength is 55MPa, and elongation at break is 220%, notched Izod impact strength be 42 kilojoules/square metre, modulus in flexure is 2316MPa, flexural strength is 62MPa.(HDT 0.45MPa) is 82 ℃ to record heat-drawn wire.
Embodiment 5
With 40 parts of polylactic resin, 40 parts of polycarbonate, the multipolymer anti-impact modifier mixes for 20 parts, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 19.6% vinyl monomer, 80% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 0.4% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Place Banbury mixer to carry out melt blending 8 minutes mixture, the melt blending temperature is controlled at 150～210 ℃, and the material behind the melt blending is pressed into the thick thin slice of 4mm with oil press, and press temperature is 175 ℃; The POLYACTIC ACID biotechnology plastics print that obtains of compacting carries out Mechanics Performance Testing, the result who obtains: tensile strength is 57MPa, and elongation at break is 229%, notched Izod impact strength be 50 kilojoules/square metre, modulus in flexure is 2256MPa, flexural strength is 64MPa.(HDT 0.45MPa) is 87 ℃ to record heat-drawn wire.
Embodiment 6
With 35 parts of polylactic resin, 40 parts of polycarbonate, the multipolymer anti-impact modifier mixes for 25 parts, and wherein the multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio: 30% vinyl monomer, 50% general formula are CH
2=CR
1Olefinic monomer (R
1For containing the alkyl group of 3～9 carbon atoms), 20% general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer (R
2Be hydrogen or alkyl group, the R that contains 1～5 carbon atom
3Be glycidyl); Place Banbury mixer to carry out melt blending 12 minutes mixture, the melt blending temperature is controlled at 150～210 ℃; Material behind the melt blending is pressed into the thick thin slice of 4mm with oil press, and press temperature is 210 ℃; POLYACTIC ACID/polycarbonate of obtaining of compacting carries out Mechanics Performance Testing, the result who obtains: tensile strength is 52MPa, and elongation at break is 230%, notched Izod impact strength be 54 kilojoules/square metre, modulus in flexure is 2212MPa, flexural strength is 52MPa.(HDT 0.45MPa) is 85 ℃ to record heat-drawn wire.
Claims (6)
1. POLYACTIC ACID biotechnology plastics obtain by directly extruding after the raw material blend or are obtained by compacting after the raw materials melt blend, it is characterized in that its feed composition proportioning by weight is following:
5～95 parts of polylactic resin,
4～90 parts of polycarbonate,
1～50 part of anti-impact modifier;
Said anti-impact modifier is the multipolymer anti-impact modifier, and said multipolymer anti-impact modifier is formed by the constituent monomers copolymerization of by mass percentage following ratio:
A. vinyl monomer 10～92%,
B. general formula is CH
2=CR
1Olefinic monomer 5～80%,
C. general formula is CH
2=C (R
2) CO
2R
3Alkenyl compound monomer 0.4～30%,
Said R
1For containing the alkyl group of 3～9 carbon atoms, R
2For hydrogen or contain the alkyl group of 1～5 carbon atom, R
3Be glycidyl.
2. a kind of POLYACTIC ACID biotechnology plastics according to claim 1, it is characterized in that: the ratio of said vinyl monomer is 15～90%.
3. a kind of POLYACTIC ACID biotechnology plastics according to claim 1, it is characterized in that: said general formula is CH
2=CR
1The ratio of olefinic monomer be 8～70%.
4. a kind of POLYACTIC ACID biotechnology plastics according to claim 1, it is characterized in that: said general formula is CH
2=C (R
2) CO
2R
3The monomeric ratio of alkenyl compound be 1～20%.
5. the preparation method of POLYACTIC ACID biotechnology plastics as claimed in claim 1 is characterized in that may further comprise the steps:
(1) by metering POLYACTIC ACID, polycarbonate, anti-impact modifier are mixed;
(2) extrude with forcing machine, the temperature of forcing machine is controlled at 180～210 ℃;
(3) with the extruded stock injection moulding, injection pressure is 0.6～0.7MPa, and injection speed is 50～70 mm/second, and the mould temperature is 30～90 ℃.
6. the preparation method of POLYACTIC ACID biotechnology plastics as claimed in claim 1 is characterized in that may further comprise the steps:
(1) by metering POLYACTIC ACID, polycarbonate, anti-impact modifier are mixed;
(2) with compound melt blending 4～12 minutes, the melt blending temperature was controlled at 150～210 ℃;
(3) with the material compression moulding behind the melt blending, press temperature is controlled at 160～210 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100541723A CN102153842B (en) | 2011-03-02 | 2011-03-02 | Polylactic acid bioengineering plastic and preparation methods thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100541723A CN102153842B (en) | 2011-03-02 | 2011-03-02 | Polylactic acid bioengineering plastic and preparation methods thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102153842A CN102153842A (en) | 2011-08-17 |
| CN102153842B true CN102153842B (en) | 2012-10-31 |
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|---|---|---|---|
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| CN103554868A (en) * | 2013-10-18 | 2014-02-05 | 上海朗亿功能材料有限公司 | High-performance biodegradable plastic metal and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597768A (en) * | 2003-08-28 | 2005-03-23 | 住友化学工业株式会社 | Process for producing resin composition, modifier for polyester resin, and process for producing modified polyester resin |
| CN1894338A (en) * | 2003-12-12 | 2007-01-10 | E.I.内穆尔杜邦公司 | Toughened poly(lactic acid) compositions |
| CN101023133A (en) * | 2004-09-17 | 2007-08-22 | 东丽株式会社 | Resin composition and molding comprising the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003267273A1 (en) * | 2002-09-19 | 2004-04-08 | A. Schulman Inc. | Ionomer modified polypropylene compound for superior scratch performance, low blushing, and molded in color with controllable gloss |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597768A (en) * | 2003-08-28 | 2005-03-23 | 住友化学工业株式会社 | Process for producing resin composition, modifier for polyester resin, and process for producing modified polyester resin |
| CN1894338A (en) * | 2003-12-12 | 2007-01-10 | E.I.内穆尔杜邦公司 | Toughened poly(lactic acid) compositions |
| CN101023133A (en) * | 2004-09-17 | 2007-08-22 | 东丽株式会社 | Resin composition and molding comprising the same |
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Granted publication date: 20121031 Termination date: 20140302 |