CN102649871B - Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof - Google Patents
Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof Download PDFInfo
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- CN102649871B CN102649871B CN201110056746.0A CN201110056746A CN102649871B CN 102649871 B CN102649871 B CN 102649871B CN 201110056746 A CN201110056746 A CN 201110056746A CN 102649871 B CN102649871 B CN 102649871B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The invention relates to the technical field of thermoplastic high molecular materials, and discloses a degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy which is applied in the aspects of household appliances, articles for daily use, electronic and electrical products and the like. The degradable PBT/PLA alloy consists of the following materials: polybutylene terephthalate, polylactic acid, a compatibilizer, an antioxidant, a nucleating agent, an ester exchange accelerant and a processing auxiliary agent. The invention also discloses a preparation method of the degradable PBT/PLA alloy. The invention aims to provide the degradable PBT/PLA alloy; and the alloy is prepared from the PBT and the degradable plastic PLA and is degraded within a certain time, so that the problem of recovery treatment of the PBT is solved well. The invention also aims to provide the preparation method of the degradable PBT/PLA alloy.
Description
Technical field
The present invention relates to thermoplastic macromolecule material technical field of modification, particularly relate to a kind of degradable PBT/PLA Alloy And Preparation Method being applied to household electrical appliance, daily necessities, the aspect such as electric.
Background technology
Polybutylene terephthalate (PBT) arrives opaque, crystalline thermoplastic polyester for oyster white is translucent, there is high heat resistance, toughness, resistance to fatigue, self-lubricating, low-friction coefficient, weathering resistance, water-intake rate are low, be only 0.1%, in wet environment, still keep various physical property (comprising electrical property), electrical insulating property, but volume resistance, dielectric loss are large.PBT heat-proof water, resistance to bases, acids, oils, but be subject to halon and corrode, hydrolytic resistance is poor, can crystallization rapidly under low temperature, good forming ability.The shortcoming of PBT is that notched Izod impact strength is low, and molding shrinkage is large, therefore most of PBT adopts glass fiber reinforcement or inorganic fill modification, and its tensile strength, flexural strength can be enhanced about more than once, and heat-drawn wire also significantly improves.PBT can long term operation under the environment of 140 DEG C, and after glass fiber reinforcement, goods vertical, horizontal shrinking percentage is inconsistent, easily makes goods generation warpage.PBT product is five general greatly engineering plastics with polymeric amide (PA), polycarbonate (PC), polyoxymethylene (POM), polyphenylene oxide (PPE) nominal again.PBT is mainly used in automobile, electronic apparatus, industrial machinery and polymer alloy, blended industry, as the divider in automobile, body part, ignitor coil skeleton, switch connector, refrigerator, motor for washer end cap, axle sleeve.
Poly(lactic acid) (PLA), also known as polylactide, it is a kind of thermoplastics of clear, colorless, it is a kind of novel biodegradable material, use reproducible plant resources (as corn) the starch material that proposes make, there is good biodegradability, can be degradable by occurring in nature microorganism after using, final generation carbonic acid gas and water, free from environmental pollution, this is highly beneficial to protection of the environment, it is generally acknowledged environment-friendly material, there is good biocompatibility simultaneously, high strength, high-modulus, shrinking percentage is little, the advantages such as the transparency is good, be applicable to process various product, and Application Areas is in continuous expansion, the application of its design comprises water tumbler, tableware, sanitary product, stationery, toy and sports goods etc.But poly(lactic acid) also exists the shortcomings such as poor toughness, heat-drawn wire be low, limits it as the use of degradable material in engineering plastics field.
And PBT is as electrical component, using certain hour need reclaim or process, but in the part that volume is little and various, recycling difficulty is comparatively large, directly burns and certainly will cause certain pollution to environment.It can be made to degrade within a certain period of time if alloy made by PBT and degradative plastics, thus solve the recycling problem of PBT well, the alloy that incineration PBT and degradative plastics are made can discharge the objectionable impurities of less amount, and fuel value is lower, meets the trend of current low-carbon (LC).
As by PBT and PLA simple blend, the difference of two kinds of polymer compatibility can cause goods to there is obvious phenomenon of phase separation, has a strong impact on the performance of product, must carry out increase-volume process to it, and is partially compatible system after increase-volume.
Summary of the invention
The object of this invention is to provide a kind of degradable PBT/PLA alloy, this alloy, by PBT and degradative plastics PLA is made alloy, makes it degrade within a certain period of time, solves the recycling problem of PBT well.
Another object of the present invention is to provide a kind of preparation method of degradable PBT/PLA alloy.
To achieve these goals, technical scheme of the present invention is:
A kind of degradable PBT/PLA alloy, is made up of following material: polybutylene terephthalate, poly(lactic acid), compatilizer, oxidation inhibitor, nucleator, transesterify promotor and processing aid.
Alternatively, described degradable PBT/PLA alloy is made up of following material by weight percentage:
Alternatively, the limiting viscosity of described polybutylene terephthalate is 1.0cm
3/ g.
Alternatively, described poly(lactic acid) is L-type or D type poly(lactic acid).
Alternatively, described compatilizer is ethylene-methyl acrylate-glyceryl methacrylate multipolymer.
Alternatively, described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, β-(3,5-di-tert-butyl-hydroxy phenyl) in the positive octadecanol ester of propionic acid and tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester two kinds.
Alternatively, described nucleator is to tert-butyl-calix [8] aromatic hydrocarbons.
Alternatively, described transesterify promotor is tetrabutyl titanate.
Alternatively, described processing aid is one or both in lubricant ethylene bis-fatty acid amides, pentaerythritol stearate.
A preparation method for degradable PBT/PLA alloy, comprises the following steps:
(1) pretreating raw material;
(2) each component is taken according to following weight percent:
(3) all raw materials taken are mixed;
(4) mixing raw material is added parallel double-screw extruder, through melt extruding, granulation.
Preferably, described step (1) specifically: drying treatment polybutylene terephthalate, poly(lactic acid), compatilizer, oxidation inhibitor, nucleator, transesterify promotor and processing aid, wherein,
The temperature of dry polybutylene terephthalate is 120 DEG C, and time of drying is 4 hours;
The temperature of dry poly(lactic acid) is 60 DEG C, and time of drying is 4 hours;
The temperature of dry compatilizer, oxidation inhibitor, nucleator, transesterify promotor and processing aid is 80 DEG C, and time of drying is 6 hours.
Alternatively, described step (3) specifically: at normal temperatures by all raw material stirring of taking 10 ~ 20 minutes, mix.
Preferably, in described step (4), the processing condition of melt stage are:
The screw diameter of described parallel double-screw extruder is 35 ~ 75 millimeters;
In dual-screw-stem machine temperature control section, district's temperature is 200 DEG C, and two district's temperature are 210 DEG C, and three district's temperature are 220 DEG C, four district's temperature are 230 DEG C, and five district's temperature are 230 DEG C, and six district's temperature are 220 DEG C, seven district's temperature are 220 DEG C, and eight district's temperature are 230 DEG C, and the head temperature of dual-screw-stem machine is 220 DEG C;
Screw speed is 100 ~ 300r/min.
Therefore, compared with prior art, apply technical scheme of the present invention, have following beneficial effect:
Degradable PBT/PLA alloy of the present invention is made up of polybutylene terephthalate (PBT), poly(lactic acid) (PLA), compatilizer, oxidation inhibitor, nucleator, transesterify promotor and processing aid, because rigidity is large, solvent resistant and heat-resisting PBT and the good PLA of processibility is blended makes alloy, and PLA is degradable thermoplastics, PBT/PLA alloy is degraded within a certain period of time, to environment, the recycling problem of PBT is solved without the need to directly burning PBT; Compatilizer and transesterify promotor can carry out increase-volume process to system, greatly improve the consistency of PBT and PLA, allow inconsistent PLA crystallization increase simultaneously and just strengthen, improve its thermotolerance; Nucleator carries out nucleation and crystallization process to PLA, and its rigidity, thermotolerance are improved.
When degradable PBT/PLA reasonable offer, pre-treatment must be carried out to starting material, the easy moisture absorption of PLA and responsive especially to moisture content, therefore drying treatment must be carried out to it before blending and modifying, treated raw material precentagewise is taken and mixed, and join in parallel double-screw extruder, melt blending is extruded, through water-cooled, air-dry, granulation, drying and packaging is finished product.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
The embodiment of a kind of degradable PBT/PLA alloy of the present invention, be made up of following material: polybutylene terephthalate (PBT), poly(lactic acid) (PLA), compatilizer, oxidation inhibitor, nucleator, transesterify promotor and processing aid form, because rigidity is large, solvent resistant and heat-resisting PBT and the good PLA of processibility is blended makes alloy, and PLA is degradable thermoplastics, PBT/PLA alloy is degraded within a certain period of time, to environment, the recycling problem of PBT is solved without the need to directly burning PBT; Compatilizer and transesterify promotor can carry out increase-volume process to system, greatly improve the consistency of PBT and PLA, allow inconsistent PLA crystallization increase simultaneously and just strengthen, improve its thermotolerance; Nucleator carries out nucleation and crystallization process to PLA, and its rigidity, thermotolerance are improved.
In the embodiment of the present invention:
The limiting viscosity of polybutylene terephthalate (PBT) is 1.0cm
3/ g;
Poly(lactic acid) (PLA) is L-type or D type poly(lactic acid);
Compatilizer is ethylene-methyl acrylate-glyceryl methacrylate multipolymer (EMA-GMA);
Oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (i.e. antioxidant 1010), β-(3,5-di-tert-butyl-hydroxy phenyl) in the positive octadecanol ester (i.e. antioxidant 1076) of propionic acid and tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester (i.e. irgasfos 168) two kinds;
Nucleator is to tert-butyl-calix [8] aromatic hydrocarbons;
Transesterify promotor is tetrabutyl titanate;
Processing aid is one or both in lubricant ethylene bis-fatty acid amides (TAF), pentaerythritol stearate (PETS).
The degradable PBT/PLA alloy of the embodiment of the present invention all can adopt same preparation method, comprises the following steps:
(1) pretreating raw material;
(2) each component is taken according to following weight percent:
(3) all raw materials taken are mixed;
(4) mixing raw material is added parallel double-screw extruder, through melt extruding, granulation.
Dual-screw-stem machine is generally divided into following components: feed system, reduction box, mair motor, screw rod, machine barrel, heating system, pumped vacuum systems, cooling system, interlock control system and electrical apparatus control system.Wherein, in the temperature control section of heating system, be divided into again the sections such as intake zone, a district, 2nd district, 3rd district, 4th district.
Wherein, in the embodiment of the present invention, the processing condition of parallel double-screw extruder melt stage are: the screw diameter of parallel double-screw extruder is 35 ~ 75 millimeters; In dual-screw-stem machine temperature control section, district's temperature is 200 DEG C, and two district's temperature are 210 DEG C, and three district's temperature are 220 DEG C, four district's temperature are 230 DEG C, and five district's temperature are 230 DEG C, and six district's temperature are 220 DEG C, seven district's temperature are 220 DEG C, and eight district's temperature are 230 DEG C, and the head temperature of dual-screw-stem machine is 220 DEG C; Screw speed controls at 100 ~ 300r/min; Extrude through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.
Embodiment 1:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) take PBT 73.5kg, PLA 20kg, EMA-GMA 4kg, antioxidant 1010 0.2kg, irgasfos 168 0.2kg, lubricant TAF 0.6kg, transesterify promotor tetrabutyl titanate 0.5kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 1kg;
(3) all raw materials taken are mixed 20min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 200r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Embodiment 2:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) PBT 60kg is taken, PLA 30kg, EMA-GMA 4kg, antioxidant 1076 0.2kg, irgasfos 168 0.2kg, lubricant TAF 0.6kg, PETS 0.4kg, transesterify promotor tetrabutyl titanate 0.5kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 0.5kg;
(3) all raw materials taken are mixed 20min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 200r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Embodiment 3:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) take PBT 85kg, PLA 10kg, EMA-GMA 3kg, antioxidant 1010 0.3kg, irgasfos 168 0.3kg, lubricant PETS 0.4kg, transesterify promotor tetrabutyl titanate 0.5kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 0.5kg;
(3) all raw materials taken are mixed 10min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 300r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Embodiment 4:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) PBT 77.5kg is taken, PLA 16kg, EMA-GMA 4kg, antioxidant 1076 0.2kg, irgasfos 168 0.3kg, lubricant TAF 0.2kg, PETS 0.3kg, transesterify promotor tetrabutyl titanate 0.5kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 1kg;
(3) all raw materials taken are mixed 15min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 250r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Embodiment 5:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) take PBT 70kg, PLA 21.6kg, EMA-GMA 6kg, antioxidant 1010 0.2kg, irgasfos 168 0.2kg, lubricant PETS 0.4kg, transesterify promotor tetrabutyl titanate 1kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 0.6kg;
(3) all raw materials taken are mixed 15min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 200r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Embodiment 6:
(1) pretreating raw material: PBT and PLA is dry respectively, and the temperature of PBT drying is 120 DEG C, 4 hours time; The temperature of PLA drying is 60 DEG C, 4 hours time.All the other materials at 80 DEG C dry 6 hours;
(2) take PBT 76kg, PLA 17kg, EMA-GMA 5kg, antioxidant 1010 0.2kg, irgasfos 168 0.3kg, lubricant PETS 0.5kg, transesterify promotor tetrabutyl titanate 0.5kg, nucleator is to tert-butyl-calix [8] aromatic hydrocarbons 0.5kg;
(3) all raw materials taken are mixed 20min in high-speed mixer;
(4) material mixed is joined in the hopper of twin screw extruder, extrudes through twin screw extruder melt blending, water-cooled, air-dry, pelletizing, last bag becomes PBT/PLA alloy finished product.Wherein, screw speed is 200r/min.
Above-mentioned PBT/PLA alloy is injection molded into standard test specimen, and test performance is as shown in table 1.
Table 1PBT/PLA alloy property table
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Density/g.cm -2 | 1.3 | 1.27 | 1.31 | 1.29 | 1.3 | 1.29 |
| Tensile strength/MPa | 45.8 | 47.6 | 52.1 | 46 | 48 | 47.5 |
| Elongation at break/% | 22.3 | 32 | 21 | 28 | 35 | 33 |
| Flexural strength/MPa | 58.3 | 62 | 66 | 58 | 61 | 56.6 |
| Modulus in flexure/MPa | 2213 | 2260 | 2421 | 2311 | 2130 | 2276 |
| Shock strength/KJm -2 | 65 | 85 | 56 | 68 | 74 | 72 |
| Heat-drawn wire/DEG C 0.45MPa | 135 | 121 | 137 | 135 | 136 | 133 |
The degradable PBT/PLA alloy degradable of the embodiment of the present invention, intensity is high, good toughness, heat resisting temperature are high and processing fluidity good, while excellent combination property, can reduce the pollution to environment, is a kind of novel environmental friendly product.
Pollution on the environment when existing plastics are discarded can be solved by using Biodegradable resin.The energy that PLA consumes when burning is less, can reduce the discharge capacity of carbonic acid gas.When incinerating PLA, its combustion heat value is identical with incineration stationery, is the half of incinerating conventional plastic (as polyethylene), and incineration poly(lactic acid) can never discharge the toxic gas such as nitride, sulfide.Human body is also containing the lactic acid existed with morphon, and this just illustrates this decomposability product and has security.According to land-fill method, PLA just can biological degradation rapidly in 2 ~ 5 years.
When degradable PBT/PLA reasonable offer, pre-treatment must be carried out to starting material, the easy moisture absorption of PLA and responsive especially to moisture content, therefore drying treatment must be carried out to it before blending and modifying, treated raw material precentagewise is taken and mixed, and join in parallel double-screw extruder, melt blending is extruded, through water-cooled, air-dry, granulation, drying and packaging is finished product.
Above the technical scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and embodiment, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, embodiment and range of application all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a degradable PBT/PLA alloy, is characterized in that, is made up of following material:
Polybutylene terephthalate 60 ~ 85%, poly(lactic acid) 10 ~ 30%, compatilizer 3 ~ 8%, oxidation inhibitor 0.4 ~ 0.6%, nucleator 0.5 ~ 1%, tetrabutyl titanate 0.5 ~ 1% and processing aid 0.4 ~ 1%.
2. a kind of degradable PBT/PLA alloy according to claim 1, is characterized in that: the limiting viscosity of described polybutylene terephthalate is 1.0cm
3/ g.
3. a kind of degradable PBT/PLA alloy according to claim 1, is characterized in that: described poly(lactic acid) is L-type or D type poly(lactic acid).
4. a kind of degradable PBT/PLA alloy according to claim 1, is characterized in that: described compatilizer is ethylene-methyl acrylate-glyceryl methacrylate multipolymer.
5. a kind of degradable PBT/PLA alloy according to claim 1, it is characterized in that: described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, β-(3,5-di-tert-butyl-hydroxy phenyl) in the positive octadecanol ester of propionic acid and tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester two kinds.
6. a kind of degradable PBT/PLA alloy according to claim 1, is characterized in that: described nucleator is to tert-butyl-calix [8] aromatic hydrocarbons.
7. a kind of degradable PBT/PLA alloy according to claim 1, is characterized in that: described processing aid is one or both in lubricant ethylene bis-fatty acid amides, pentaerythritol stearate.
8. a preparation method for degradable PBT/PLA alloy, is characterized in that, comprises the following steps:
(1) pretreating raw material;
(2) each component is taken according to following weight percent:
(3) all raw materials taken are mixed;
(4) mixing raw material is added parallel double-screw extruder, through melt extruding, granulation.
9. the preparation method of a kind of degradable PBT/PLA alloy according to claim 8, it is characterized in that, described step (1) is specifically: drying treatment polybutylene terephthalate, poly(lactic acid), compatilizer, oxidation inhibitor, nucleator, tetrabutyl titanate and processing aid, wherein
The temperature of dry polybutylene terephthalate is 120 DEG C, and time of drying is 4 hours;
The temperature of dry poly(lactic acid) is 60 DEG C, and time of drying is 4 hours;
The temperature of dry compatilizer, oxidation inhibitor, nucleator, tetrabutyl titanate and processing aid is 80 DEG C, and time of drying is 6 hours.
10. the preparation method of a kind of degradable PBT/PLA alloy according to claim 8, is characterized in that, described step (3) specifically: at normal temperatures by all raw material stirring of taking 10 ~ 20 minutes, mix.
The preparation method of 11. a kind of degradable PBT/PLA alloys according to claim 8, is characterized in that, in described step (4), the processing condition of melt stage are:
The screw diameter of described parallel double-screw extruder is 35 ~ 75 millimeters;
In dual-screw-stem machine temperature control section, district's temperature is 200 DEG C, and two district's temperature are 210 DEG C, and three district's temperature are 220 DEG C, four district's temperature are 230 DEG C, and five district's temperature are 230 DEG C, and six district's temperature are 220 DEG C, seven district's temperature are 220 DEG C, and eight district's temperature are 230 DEG C, and the head temperature of dual-screw-stem machine is 220 DEG C;
Screw speed is 100 ~ 300r/min.
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| CN103275471A (en) * | 2013-01-11 | 2013-09-04 | 杭州旭昇新材料科技有限公司 | Biodegradable environment friendly formwork material and preparation method thereof |
| CN104861588A (en) * | 2015-04-20 | 2015-08-26 | 苏州经贸职业技术学院 | Pbt composition and preparation method thereof |
| CN111454553A (en) * | 2020-05-18 | 2020-07-28 | 长沙乐远化工科技有限公司 | Modified polylactic acid material and preparation method thereof |
| CN112159579A (en) * | 2020-09-25 | 2021-01-01 | 广东国立科技股份有限公司 | Functional degradable material with controllable degradation period and preparation method thereof |
| CN113372692A (en) * | 2021-06-23 | 2021-09-10 | 广东虹勤通讯技术有限公司 | Polyester composite material and flexible cover sheet base material |
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| CN101142282A (en) * | 2005-03-11 | 2008-03-12 | 富士通株式会社 | Plant resin composition and plant resin molded product |
| CN101671476A (en) * | 2008-09-11 | 2010-03-17 | 拜耳材料科技贸易(上海)有限公司 | Blend of aromatic polycarbonate and polylactic acid, preparation method and application thereof |
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