CN105713360A - Preparation method of high-toughness polycarbonate/polylactic acid based alloy - Google Patents
Preparation method of high-toughness polycarbonate/polylactic acid based alloy Download PDFInfo
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- CN105713360A CN105713360A CN201410733882.2A CN201410733882A CN105713360A CN 105713360 A CN105713360 A CN 105713360A CN 201410733882 A CN201410733882 A CN 201410733882A CN 105713360 A CN105713360 A CN 105713360A
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- polylactic acid
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Abstract
The invention discloses a preparation method of a polycarbonate/polylactic acid based alloy. The alloy is composed of the following components in parts by weight: 60 to 100 parts of polylactic acid (PLA) resin, 0 to 40 parts of polycarbonate (PC) resin, 0 to 20 parts of compatilizer, 0 to 20 parts of flexibilizer, and 0 to 1 part of heat stabilizer. The alloy is prepared by the following steps: evenly mixing the matrix (PLA resin), PC resin, compatilizer, flexibilizer, and heat stabilizer by a high speed mixing machine, and extruding the mixture by a double screw extruder to produce uniform granules. The preparation method has the advantages of easily-available materials and simple production technology. The polycarbonate (PC) has the advantages of good impact resistant performance, high refractive index, and good processing properties. PLA is partially compatible with common PC resin, the processing property and physical and mechanical properties of the blend system of PC and PLA are common, the toughness of PLA is effectively improved by the added compatilizer and flexibilizer; the Charpy notched impact strength is increased from 3 kJ/m<2> to 55 kJ/m<2>, the problem of severely insufficient brittleness of PLA is solved through the alloy preparation, and the application range of PLA is enlarged to following fields: automobiles, electronics, home decorations, building materials, and the like.
Description
Technical field
The invention belongs to the field of polymer composite material in material science, relate to a kind of utilize polycarbonate resin, toughener, compatilizer standby go out high tenacity PLA base alloy method.The preparation method of the PC/PLA base alloy prepared by the present invention, PLA elongation at break is low, toughness is low and toughening element problem of decentralized difference in material system to solve tradition.The performance controllability that method involved in the present invention is simple to operate, prepare material is strong, it is adaptable to laboratory and enterprise's industrialization produce, and this material is a kind of high tenacity PLA base alloy material.
Background technology
Along with the development of macromolecular material, petroleum base macromolecular material is widely used in human lives and work.But these material source non-renewable resources, and be difficult to degrade in natural environment, cause the deterioration of the ecological environment and resource scarcity, do not meet the strategy of human kind sustainable development, bring harm to the mankind.In recent years, Wei the biodegradation material deriving from Renewable resource causes people to note widely.
PLA is unique with living resources for raw material, by the degradable linear aliphatic adoption ester of chemical synthesis process, it derives from Renewable resource, there is good biocompatibility, degradability, higher hot strength and modulus of compressibility, therefore PLA is considered as the substitute of petroleum-based plastics: be applied to general-purpose plastics field, is of great significance for reducing environmental pollution, save petroleum resources and alleviating global greenhouse effect aspect tool.Petroleum resources shortage and environmental pollution have seriously promoted development and the application of non-petroleum base degradable green high polymer.PLA is a kind of green thermoplastic polyester integrating biological degradability, Bioabsorbable, there is good mechanical strength, elastic modelling quantity and hot formability, catabolite can penetrate into body metabolism, it is widely used in the fields such as medical treatment, pharmacy, agricultural, packing business, service occupation, it is believed that be the degradable polymer having market potential up to now most.But, identical with other macromolecular materials, impact strength lower limit PLA is in aviation.The application in the field such as electronics, automobile, develops the environmental protection PLA with higher toughness and seems particularly urgent for this.
Summary of the invention
A kind of toughening modifying method provided for solution PLA mechanical property is poor is provided
Realizing the object of the invention technical solution is: high tenacity PC/PLA alloy preparation method, by PLA resin, PC, compatilizer, toughener, heat stabilizer vacuum drying and by ratio row mixing, make the matrix moisture content of dried blend lower than 50ppm, then adopt the method melt extruded that blend is injection molded into master body, it is characterised in that the fusing point of matrix PLA between 150～200 DEG C, Merlon 245～265 DEG C melt extrude temperature 180～265 DEG C.
A kind of Merlon/polylactic acid based alloy compositions and components by weight percent number proportioning be: PLA resin 60～100 parts, PC resin 0～40 part, compatilizer 0～20 part, toughener 0～20 part, heat stabilizer 0～4 part.
Described PLA is selected from the molecular weight of PLA resin matrix and is chosen for 12 × 106, account for the 60～100% of oeverall quality.
Described PC is selected from one or more in Bayer 2805, LG1201, Mitsubishi S2000VR, and addition is the 0～20% of gross mass.
Described compatilizer is selected from one or more of SEBS-g-MAH, SAN-g-MAH, ABS-g-MAH, accounts for the 0～10% of oeverall quality.
The toughener told is selected from one or more of MBS, ACR, EBA, accounts for the 0～20% of oeverall quality.
The heat stabilizer told, it is selected from four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane, three (2,4-di-tert-butyl-phenyl) phosphite esters and double; two (2,4-di-tert-butyl-phenyl) one or more of pentaerythritol diphosphites, account for the 0～4% of overall addition.
Detailed description of the invention
Embodiment one
Weigh PLA (2003D) 85 parts
PC (1201) 15 parts
By proportioning by PLA, PC, compatilizer, toughener, 50～100 DEG C of vacuum drying 5～24h of heat stabilizer, mixed 3～5 minutes by high-speed mixer, the material mixed is joined in double screw extruder by hopper, through melt blending extrusion, water-cooled, air knife cool drying, pelletize, homogenizing, wherein barrel temperature is set to: leading portion 240 DEG C, 265 DEG C of stage casing, back segment 260 DEG C, screw slenderness ratio 35, head temperature 260 DEG C, screw speed 280rmp/min.
Embodiment two
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
EVA-g-MAH5 part
ACR5 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
Embodiment three
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
E-MA-MAH5 part
ACR5 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
Embodiment four
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
E-MA-GMA5 part
ACR6 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
Embodiment five
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
E-MA-GMA5 part
MBS5 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
Embodiment six
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
E-MA-GMA5 part
EBA5 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
Embodiment seven
Weigh PLA (2003D) 70 parts
PC (1201) 30 parts
E-MA-GMA5 part
EBA8 part
Four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane 0.5 part
Process conditions are embodiment one such as
The performance test results
| Test event | Unit | Embodiment one | Embodiment two | Embodiment three | Embodiment four | Embodiment five | Embodiment six | Embodiment seven |
| Hot strength | MPa | 75.2 | 65.6 | 63.2 | 59.2 | 55.1 | 55.5 | 52.3 |
| Elongation at break | % | 15.2 | 20.4 | 23 | 25.3 | 30.2 | 32.1 | 33.1 |
| Notch impact strength | Kj/m2 | 5.5 | 11.4 | 20.3 | 24.2 | 33.2 | 45.4 | 55.3 |
Claims (7)
1. a preparation method for high tenacity polycarbonate/polylactic acid based alloy, is by adding PC, compatilizer, toughener, heat stabilizer and polylactic acid blend, the difficult problems such as the elongation at break better solving PLA alloy modification is low, material matrix poor mechanical property.
2. the high tenacity polycarbonate according to patent requirements 1/polylactic acid based alloy, the molecular weight of its PLA resin matrix is chosen for 12 × 106。
3. the high tenacity polycarbonate according to patent requirements 1/polylactic acid based alloy, PC is selected from one or more in Bayer 2805, LG1201, Mitsubishi S2000VR.
4. high tenacity polycarbonate/polylactic acid based alloy according to patent requirements 1, compatilizer is selected from one or more of E-MA-GMA, E-MA-MAH, EVA-g-MAH.
5. high tenacity polycarbonate/polylactic acid based alloy according to patent requirements 1, toughener is selected from one or more of MBS, ACR, EBA.
6. the high tenacity polycarbonate according to patent requirements 1/polylactic acid based alloy, heat stabilizer, it is selected from four [3-(3,5-di-t-butyl) propanoic acid] tetramethylolmethane, three (2,4-di-tert-butyl-phenyl) one or more of phosphite ester and double; two (2,4-di-tert-butyl-phenyl) pentaerythritol diphosphites.
7. the high tenacity polycarbonate according to patent requirements 1/polylactic acid based alloy, its feature with comprise the following steps: by proportioning by PLA, PC, compatilizer, toughener, 50～100 DEG C of vacuum drying 5～24h of heat stabilizer, mixed 3～5 minutes by high-speed mixer, then pass through double screw extruder, the temperature of double screw extruder is set to a district: 170～265 DEG C, 2nd district: 175～265 DEG C, 3rd district: 180～260 DEG C, 4th district: 180～265 DEG C, 5th district: 185～265 DEG C, 6th district: 190～265 DEG C, 7th district: 195～265 DEG C, 8th district: 200～265 DEG C, 9th district: 200～265 DEG C, tenth district: 200～265 DEG C, head: 195～265 DEG C, engine speed 150～350rpm, subsidiary engine rotating speed 7～15rmp.
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| CN201410733882.2A CN105713360A (en) | 2014-12-05 | 2014-12-05 | Preparation method of high-toughness polycarbonate/polylactic acid based alloy |
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| CN201410733882.2A CN105713360A (en) | 2014-12-05 | 2014-12-05 | Preparation method of high-toughness polycarbonate/polylactic acid based alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108641332A (en) * | 2018-06-01 | 2018-10-12 | 北京理工大学珠海学院 | The PC/PLA high molecule alloy materials and preparation method thereof of high heat-resisting high tenacity |
| WO2023020413A1 (en) * | 2021-08-17 | 2023-02-23 | 金发科技股份有限公司 | High-toughness flame-retardant polycarbonate alloy composition, and preparation method therefor and application thereof |
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| CN102417699A (en) * | 2010-09-27 | 2012-04-18 | 比亚迪股份有限公司 | Plastic alloy material composition, plastic alloy material and injection molding part |
| CN102850744A (en) * | 2011-06-29 | 2013-01-02 | 比亚迪股份有限公司 | Plastic composition, plastic and preparation method of the plastic |
| CN104086968A (en) * | 2014-07-03 | 2014-10-08 | 合肥杰事杰新材料股份有限公司 | Scratch-resistant polycarbonate/polylactic acid alloy material and preparation method thereof |
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2014
- 2014-12-05 CN CN201410733882.2A patent/CN105713360A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417699A (en) * | 2010-09-27 | 2012-04-18 | 比亚迪股份有限公司 | Plastic alloy material composition, plastic alloy material and injection molding part |
| CN102850744A (en) * | 2011-06-29 | 2013-01-02 | 比亚迪股份有限公司 | Plastic composition, plastic and preparation method of the plastic |
| CN104086968A (en) * | 2014-07-03 | 2014-10-08 | 合肥杰事杰新材料股份有限公司 | Scratch-resistant polycarbonate/polylactic acid alloy material and preparation method thereof |
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| 孙振萍: "聚乳酸/聚碳酸酯共混复合材料增韧增强研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108641332A (en) * | 2018-06-01 | 2018-10-12 | 北京理工大学珠海学院 | The PC/PLA high molecule alloy materials and preparation method thereof of high heat-resisting high tenacity |
| WO2023020413A1 (en) * | 2021-08-17 | 2023-02-23 | 金发科技股份有限公司 | High-toughness flame-retardant polycarbonate alloy composition, and preparation method therefor and application thereof |
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Application publication date: 20160629 |