CN104559110A - PC/PET (polycarbonate/polyethylene terephthalate) alloy material and preparation method thereof - Google Patents
PC/PET (polycarbonate/polyethylene terephthalate) alloy material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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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
- B29C48/92—Measuring, controlling or regulating
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a PC/PET (polycarbonate/polyethylene terephthalate) alloy material which has low shrinkage and is easy to coat. The PC/PET alloy material comprises components in percentage by weight as follows: 30%-60% of PC, 15%-35% of PET, 15%-20% of acrylonitrile-butadiene-styrene, 10%-25% of inorganic filler, 1%-10% of a toughening agent, 0.1%-1% of a chain extender and 0.2%-4% of an assistant. According to the PC/PET alloy material, specific quantities of the components are combined to produce ideal synergistic effect, so that the alloy material not only has excellent comprehensive mechanical property, but also has ultra-low shrinkage rate, a product does not require polishing processing, primer coating can be directly avoided, and the coating cost is saved. The invention discloses a preparation method of the PC/PET alloy material. According to the preparation method, the preparation can be realized by adopting conventional equipment, namely a double-screw extruder, and through control of feeding position and temperature, the preparation is simple and easy to control.
Description
Technical field
The present invention relates to polycarbonate/polyethylene terephthalate field, be specifically related to polycarbonate/polyethylene terephthalate of the easy application of a kind of lower shrinkage and preparation method thereof.
Background technology
Polycarbonate/polyethylene terephthalate (PC/PET) alloy had both remained processing fluidity, the solvent resistance of PET, had again dimensional stability and the high tenacity of PC, was used widely in fields such as electronic connector, automobile interior exterior decorations.Along with PET content increases in PC/PET alloy, shrinking percentage increases, and solvent resistance improves.In practical application in industry, particularly for heavy wall, need sprayed product, as automobile door handle, casing of rearview mirror, central control panel etc. require moulded products not reprint books in a reduce format, easy application, PASS will be got well, and can ensure that goods Cracking Failure can not occur in use procedure.Although general PC/ABS, PC/PET alloy resin shrinking percentage is very low, shaping goods heavy wall position is still existed and obviously reprints books in a reduce format, affect products appearance; And glass fiber reinforced materials can reduce contractibility, eliminate shaping reprinting books in a reduce format, but product surface is floating fine serious, need later stage manual polishing and the application of spray base ability, process costs increases greatly.Therefore need a ultralow shrinking percentage, goods without reprinting books in a reduce format and smooth appearance, alloy material without the need to priming paint, direct spraying.Patent at present about PC alloy is a lot, but for low-shrinkage, PC/PET alloy material of easy application and preparation method thereof have not been reported.
About the preparation of polycarbonate/polyethylene terephthalate, have many patent documentations to discuss the problem of material compatibility both at home and abroad and alloy fire-retardant, the modification technology of enhancing aspect.
The Chinese invention patent application of application publication number CN 1699468A (application number is 200510026716.X) discloses a kind of polycarbonate/acrylonitrile-butadiene-styrene ternary copolymerized resin ABS/ polybutylene terephthalate PBT alloy material, its composition is by weight percentage: PC 40%-70%, ABS 40%-70%, PBT 5%-10%, expanding material 3%-10%, oxidation inhibitor 0.2%-2.0%, adopt the maleic anhydride grafted ABS of high level as compatilizer, solve the problem of resin and metal insert cohesive strength deficiency, and the shrinking percentage of this system is suitable with common PC alloy shrinkage rate, the problem reprinted books in a reduce format in product wall thickness place cannot be solved.
Application publication number is that CN 103819887A (application number 201210464173.X) relates to a kind of high rigidity high heat resistance PC/PET alloy material and preparation method thereof, and this alloy material is made up of the component comprising following weight part: polycarbonate resin 500 ~ 750 parts, pet resin 10 ~ 210 parts, wollastonite powder 60 ~ 140 parts, wollastonite fibre 60 ~ 140 parts, toughner 20 ~ 80 parts, dispersion agent 0.5 ~ 5 part, 1 ~ 8 part, oxidation inhibitor, lubricant 1 ~ 8 part; Above-mentioned raw materials obtains high rigidity high heat resistance PC/PET alloy material pellet through high-speed mixing and extruding pelletization.The PET resin of 10% ~ 21% is adopted in this invention, about 20% wollastonite powder and fiber composite is adopted to fill, although obtained material has higher stretching, flexural strength and resistance toheat, sacrifice to some extent in the impelling strength of material, thus have certain limitation in the application.Do not relate to material contracts rate in this patent and application problem of spraying paint, and in system, do not add ABS component, in spraying effect, need further raising yet.
Summary of the invention
The invention provides the polycarbonate/polyethylene terephthalate of the easy application of a kind of lower shrinkage, desirable synergy is produced by the combination of each component under certain content, make it have ultralow shrinking percentage and there is higher toughness, and can carry out exempting from primer painting, reach perfect effect, excellent combination property.
A kind of polycarbonate/polyethylene terephthalate (i.e. the polycarbonate/polyethylene terephthalate of the easy application of lower shrinkage), is made up of the component of following weight percentage:
As preferably, described polycarbonate/polyethylene terephthalate, is made up of the component of following weight percentage:
Further preferably, described polycarbonate/polyethylene terephthalate, is made up of the component of following weight percentage:
Described toughner is two kinds in MBS toughner, EMA toughner, described MBS toughner be with polystyrene and methacrylic ester be shell, the anti-impact modifier of the divinyl nucleocapsid structure that is core, described EMA toughner is ethylene-methyl acrylate-glyceryl methacrylate terpolymer toughner;
With weight, the content of MBS toughner is the content of 1% ~ 3%, EMA toughner is 2% ~ 3%.
Through a large amount of research experiments, for PC/PET alloy system, when PET content is more than more than 10%, the solvent resistant cracking performance of system is just higher than pure PC resin, and lower than 10% time can there is transesterification reaction in the molten state due to PC and PET, cause the molecular weight of resin to reduce, make the solvent resistant cracking performance of alloy system be deteriorated on the contrary.But the product of PC and PET transesterify plays compatibilization as compatilizer, alloy system is made to have excellent mechanical property.Therefore, the suitably transesterify degree of control PC/PET alloy system, and improve the content of PET, selecting the polyethylene terephthalate of 15% ~ 35% to ensure, alloy has good solvent resistant cracking performance is that the present invention will one of achieve the goal.
Shrinking percentage and the PET content of PC/PET alloy are also closely related, the molding shrinkage 0.6%-0.7% of PC resin, the molding shrinkage 2.0%-2.5% of PET resin, when PET content lower than 10% time, due to the transesterification reaction between PC/PET, cause in system and there is larger noncrystalline unformed phase, shrinking percentage and the PC of solid system are suitable, after PET content is more than 10%, PET forms crystal aggregation state in system, cause the shrinking percentage of system to be greater than PC resin, and PET content is higher, alloy system shrinking percentage is larger.Mineral filler is the most effective means improving alloy system shrinking percentage, adds the molding shrinkage that certain proportion effectively can regulate product.But the consistency of most of mineral filler and polycarbonate is poor, the special filler containing alkaline matter, in the mixing preparation process of alloy molten, can cause the fast degradation of polycarbonate, cause the toughness of system greatly to reduce, and heat-proof aging temperature also significantly reduce.During post-production, slightly stop in injection moulding machine and just oxidative degradation occurs, cause products appearance defect and performance to reduce.Because alloy material of the present invention may be used for the goods that spray paint of exempting from primary coat, require shaping rear product surface bright and clean and without reprinting books in a reduce format, therefore the present invention has carried out particular design in the choice and application of filler.
Product of the present invention can be applied to the goods that spray paint, and without the need to priming paint, direct spraying colored paint and finish paint, require that PASS is higher.The application although general PC/PET alloy can spray paint, PC poor solvent resistance, with the benzene in paint, very easily there is stress cracking in the contact of dimethylbenzene equal solvent, PET adds the resistance to dissolubility of system, but PASS is subject to certain impact.Introduce excellent ABS resin of spraying paint in the present invention, effectively can solve the problem of PASS.And the shrinking percentage 0.5-0.6% of ABS resin, less on the shrinking percentage impact of system, ABS has good anti-stress cracking ability, can improve the stress crack resistance performance of alloy system further.
As preferably, described polycarbonate is the PC resin of medium viscosity rank, melting index MI8-20g/10min, test condition: 300 DEG C, 1.2kg.According to the PC of the different viscosity of the dissimilar selection of the polycarbonate/polyethylene terephthalate of the easy application of lower shrinkage high tenacity lower shrinkage, further preferred molten index M I is 10g/10min, Korea S LG, PC 1201-10.
Polyethylene terephthalate (PET) is a kind of semicrystalline polymeric, and under molten state, mobility is very good, and to improving, PC processibility is helpful.The present invention selects PET resin limiting viscosity [η] to be 0.5-1.2dl/g, [η] test condition: adopt the phenol of volume ratio 1:1 and tetrachloroethane to be solvent, preferably [η] is 0.8dl/g further, as the product adopting Shanghai far to spin PET CB602.Easily there is transesterification reaction in PC and PET in the molten state, and appropriate ester exchange offspring can play the effect of PC and PET alloy expanding material, but transesterification reaction is excessive, causes molecular resin amount to reduce, can weaken mechanical property and the solvent resistance of system.Therefore, the transesterification reaction wanting between moderate control polyester when preparing this alloy material, introduces chainextender and effectively can improve the material degradation effect that transesterification reaction causes in system.
PC, PET are in the splitting of chain of course of processing Middle molecule, produce active group COOH, Ph-OH, R-OH, expand in the present invention that to connect agent be compound containing epoxide group or containing the compound having oxazoline group, again can be coupled with these end groups, form branched polymer, improve the molecular weight of resin, keep the performance of resin.Described expansion connects the product that agent can adopt the product of BASF ADR4370S, Japanese catalyst RPS 1005 [i.e. (2-pseudoallyl-2-oxazoline)-styrol copolymer].Chainextender contains multiple epoxy-functional Yi Ji oxazoline functional group, the end carboxyl produced with PC and PET transesterification reaction and terminal hydroxy group react, take chainextender as node, the molecular chain of degradative resin is coupled again, keep higher molecular weight, thus ensure that material has good physical and mechanical properties and heat aging property.
Described acrylic nitrile-butadiene-styrene is graft copolymer, can adopt commercially available prod.
The molding shrinkage that mineral filler improves material is introduced in the present invention, described mineral filler is one or both in mineral, whisker, described mineral can select talcum powder, barium sulfate, in glass microballon etc. one or more, described whisker can select potassium titanate crystal whisker, in aluminium borate whisker, silicon-dioxide whisker etc. one or more, the length-to-diameter ratio 2-20:1 of whisker, improves successful to shrinking percentage.Further preferably, described mineral filler is talcum powder and silicon-dioxide whisker.Due to mineral filler and resin compatible poor, thus mineral carry out surface treatment before use, improve the interface compatibility of mineral and resin.Containing alkaline matter in many mineral fillers, cause the degraded of polycarbonate when melting, therefore in the present invention, first mineral filler and PET and ABS resin are made master batch on the one hand, then carry out melt blending with the component such as PC; On the other hand add chainextender, Partial digestion molecular chain is connected by the group of chainextender, molecular resin amount is reduced and controls in certain scope, thus ensure that the heat decomposition temperature of alloy system is in a higher level.
PC/PET alloy mineral is filled rear toughness and is significantly reduced, and shock strength, elongation at break all only has about 1/10 of non-reinforcing material, and in use material is partially crisp, and goods easily rupture.Described toughner is one or both in MBS toughner, EMA toughner, described MBS toughner be with polystyrene and methacrylic ester be shell, the anti-impact modifier of the divinyl nucleocapsid structure that is core, described EMA toughner is ethylene-methyl acrylate-glyceryl methacrylate terpolymer toughner.MBS toughner and EMA toughner all can adopt commercially available prod, and wherein, MBS toughner of the present invention can adopt the product of ROHM AND HAAS EXL 2620, the product of middle deep M701.EMA toughner adopts the product of EMA Du Pont AC 1125 or adopts the product of Exxon Mobil TC 110.With weight, the content of MBS toughner is the content of 1% ~ 5%, EMA toughner is 1% ~ 3%.
The present invention introduces two class toughner, and polystyrene and methacrylic ester are shell, and divinyl is the anti-impact modifier MBS of the nucleocapsid structure of rubbery kernel, improves the impelling strength of PC/PET alloy; Add ethylene-methyl acrylate-glyceryl methacrylate terpolymer toughner EMA, containing epoxy-functional and PET, PC and inorganic mineral, there is good consistency, the shock strength of system and elongation at break are improved significantly.
In the present invention, described auxiliary agent is oxidation inhibitor and lubricant, and with weight, the content of oxidation inhibitor is 0.1% ~ 2%, and the content of lubricant is 0.1% ~ 2%; Further preferably, the content of oxidation inhibitor is 0.2% ~ 0.5%, and the content of lubricant is 0.2% ~ 0.5%.
Described oxidation inhibitor is one or both in Hinered phenols antioxidant (as antioxidant 1076), phosphite ester kind antioxidant (as irgasfos 168), specifically can select the oxidation inhibitor that antioxidant 1076 and irgasfos 168 weight ratio 1:1 are mixed to get.
Described lubricant is one or both in polyol ester series lubricant agent, silicone based lubricant, as PETS (pentaerythritol stearate), organosiloxane resins.
A preparation method for polycarbonate/polyethylene terephthalate, comprises the following steps:
1) by after the mixing of the auxiliary agent of polyethylene terephthalate (PET), acrylic nitrile-butadiene-styrene (ABS), mineral filler and partial amount, melt extrude through twin screw extruder, cool, pelletizing, obtain master batch;
2) by the first segment machine barrel place charging opening feeding of the auxiliary agent of polycarbonate, toughner, chainextender and residual content at twin screw extruder, master batch is in Section of five machine barrel charging opening feeding of twin screw extruder, through fusion plastification, extruding pelletization, system is to the polycarbonate/polyethylene terephthalate (i.e. polycarbonate/polyethylene terephthalate) of the easy application of lower shrinkage.
In the inventive method, because polyester (polycarbonate and polyethylene terephthalate) is more responsive to moisture, under high temperature fused state, triggered degradation.Therefore, before alloy material preparation, will carry out finish-drying to raw material, moisture controlled is below 0.05%.
Step 1) in, the temperature that melt extrudes of described twin screw extruder is 245 DEG C ~ 275 DEG C, particularly, the temperature of described twin screw extruder is arranged: the firstth district to each section of the 9th district temperature is respectively 250 ± 5 DEG C, 260 ± 5 DEG C, 270 ± 5 DEG C, 270 ± 5 DEG C, 270 ± 5 DEG C, 265 ± 5 DEG C, 265 ± 5 DEG C, 260 ± 5 DEG C, 260 ± 5 DEG C, die head temperature is 250 DEG C ~ 265 DEG C, and main-machine screw rotating speed is 550 ~ 850r/min.
Step 2) in, the temperature that melt extrudes of described twin screw extruder is 245 DEG C ~ 300 DEG C, and the temperature of described twin screw extruder is arranged: be respectively 270 DEG C ~ 280 DEG C, 280 DEG C ~ 290 DEG C, 290 DEG C ~ 300 DEG C, 275 DEG C ~ 280 DEG C, 265 DEG C ~ 270 DEG C from first segment machine barrel to each section of temperature of Section of five machine barrel; Be 260 DEG C ~ 270 DEG C, 250 DEG C ~ 260 DEG C, 245 DEG C ~ 255 DEG C from Section of six machine barrel to the temperature of each section of head, 245 DEG C ~ 250 DEG C, die head temperature is 250 DEG C ~ 265 DEG C.
In the preparation method of the polycarbonate/polyethylene terephthalate of the easy application of described lower shrinkage, in twin screw extruder, screw slenderness ratio is 32 ~ 48:1, rotating speed 350r/min ~ 850r/min.
Before master batch adds forcing machine, guarantee that the material added from first segment machine barrel is in molten state, in the leading portion screw combinations of forcing machine, therefore increase the intensity of mixing plasticizing screwing element, improve plasticizing effect.Under high temperature high shear condition, after the complete melting of full-bodied PC resin, in the also Flashmelt plasticizing in hot environment of Section of five master batch that machine barrel place adds, and dispersed.Because hardness of minerals is high, be subject to screw rod shearing friction, heat-dissipating speed is far above resin material, therefore Section of five machine barrel to head this section of screw rod needs more weak screw thread combination, the shearing friction that such master batch is subject in machine barrel is more weak, both can be dispersed, avoid again the too much degraded causing PC resin, improve the capable performance of alloy system mechanics and thermostability.
Compared with prior art, tool of the present invention has the following advantages:
The polycarbonate/polyethylene terephthalate of the easy application of lower shrinkage of the present invention, there is ultralow shrinking percentage and there is higher impact toughness and elongation at break, in formulating of recipe, adopt PC/PET/ABS to be alloy resin system, solve the stress cracking easily occurred when the material later stage is applied, the shortcoming of poor solvent resistance, the goods of institute's injection moulding have bright and clean surface, primary coat can be exempted from spray paint, reduce coating process, save painting cost, and PASS is strong.Adopt mineral and whisker composite filled, the problem of active balance product strength, outward appearance, shrinking percentage, particularly for automobile-used exterior trim product as door handle, wall thickness place serious problems of reprinting books in a reduce format are able to effective solution.Material of the present invention has excellent comprehensive mechanical performance, and ultralow shrinking percentage, for the application and development of material later stage provides larger design space.
The preparation method of the polycarbonate/polyethylene terephthalate of the easy application of lower shrinkage of the present invention, existing equipment twin screw extruder is adopted to realize, by the adjustment of screw combinations and the control of feed location and temperature, adopt the filling of PC/PET/ABS and mineral filler, reach the object reducing material contracts rate, preparation is simple, is easy to control, be easy to industrialization scale operation, have broad application prospects.
Embodiment
Percentage ratio in embodiment is all weight percentage.PC and PET, mineral need drying treatment, and moisture requirement is lower than 0.05%.PC 120 DEG C of dryings 4 hours, PET 150 DEG C of dryings 4 hours, talcum powder and whisker 120 DEG C of dryings 2 hours.
Comparative example 1 ~ 3 and embodiment 1 ~ 8
1) preparation of master batch: polyethylene terephthalate (is far spun CB 602, limiting viscosity [η] is 0.8dl/g, [η] test condition: adopt the phenol of volume ratio 1:1 and tetrachloroethane to be solvent), ABS (Gaoqiao Petrochemical Company, 3513), mineral filler (commercially available 1250 order talcum powder, length-to-diameter ratio is the silicon-dioxide whisker of 2-10) and the auxiliary agent of half amount [oxidation inhibitor (is mixed to get by weight 1:1 by irgasfos 168 and antioxidant 1076, the model that irgasfos 168 selects Jin Haiyabao to produce is the product of AT-168, the model that antioxidant 1076 vapour bar is produced is the product of IRGANOX 1076) and lubricant (pentaerythritol stearate, the peaceful LOXIOL P 861/3.5 of section)] after height mixes conjunction, extrude through twin screw extruder and make master batch.The temperature of twin screw extruder is arranged: the firstth district to each section of the 9th district temperature is respectively 250 ± 5 DEG C, 260 ± 5 DEG C, 270 ± 5 DEG C, 270 ± 5 DEG C, 270 ± 5 DEG C, 265 ± 5 DEG C, 265 ± 5 DEG C, 260 ± 5 DEG C, 260 ± 5 DEG C, die head temperature is 250 DEG C ~ 265 DEG C, main-machine screw rotating speed is 750r/min, extrude material strip through water-cooled, dehumidifying, pelletizing, obtains master batch, for subsequent use.Master batch does before alloy adds from side feeding at next step and PC and also needs desiccant dehumidification, and 130 DEG C of dryings 4 hours, moisture controlled is below 0.05%.
2) by polycarbonate (Korea S LG 1201-10, MI 10g/10min), MBS toughner (ROHM AND HAAS EXL 2620), EMA toughner (Du Pont AC 1125), chainextender ((2-pseudoallyl-2-oxazoline)-styrol copolymer, Japan catalyst RPS 1005) drop into the high mixer mixing 2min of 950r/min, [oxidation inhibitor (is mixed to get by weight 1:1 by irgasfos 168 and antioxidant 1076 to add the auxiliary agent remaining half amount again, the model that irgasfos 168 selects Jin Haiyabao to produce is the product of AT-168, the model that antioxidant 1076 vapour bar is produced is the product of IRGANOX 1076) and lubricant (pentaerythritol stearate, the peaceful LOXIOLP 861/3.5 of section)], the charging opening of mixed material from the first segment machine barrel of twin screw extruder is added.Again previously prepared master batch is added by Section of five machine barrel spout.Each section of temperature of twin screw extruder machine barrel is respectively 270 DEG C ~ 280 DEG C, 280 DEG C ~ 290 DEG C, 290 DEG C ~ 300 DEG C, 275 DEG C ~ 280 DEG C, 265 DEG C ~ 270 DEG C from first segment machine barrel to each section of temperature of Section of five machine barrel; Be 260 DEG C ~ 270 DEG C, 250 DEG C ~ 260 DEG C, 245 DEG C ~ 255 DEG C from Section of six machine barrel to the temperature of each section of head, 245 DEG C ~ 250 DEG C, die head temperature is 250 DEG C ~ 265 DEG C.In twin screw extruder, screw slenderness ratio is 40:1, rotating speed 800r/min.Through water-cooled, pelletizing after twin screw extruder is extruded, pellet 100 DEG C of placements in air dry oven, after 4 hours, obtain the polycarbonate/polyethylene terephthalate of the easy application of lower shrinkage, then prepare test bars by injection moulding machine.
In comparative example 1 ~ 3 and embodiment 1 ~ 8, the weight percentage (%) of each raw material refers to table 1, and batten prepared by comparative example 1 ~ 3 and embodiment 1 ~ 8 is carried out performance test, and test result refers to table 2, and testing apparatus and standard refer to table 3.
Table 1
Table 2
Continued 2
| Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| 55.7 | 67.8 | 56.5 | 64.7 | 62.8 | 65.2 |
| 25.6 | 30.8 | 45.6 | 32.4 | 23.9 | 26.7 |
| 89.5 | 101.3 | 89.6 | 94.6 | 83.7 | 90.1 |
| 4031.1 | 4368.7 | 3878.3 | 3915.7 | 3789 | 4111.9 |
| 18.8 | 18.6 | 32.1 | 20.3 | 16.4 | 14.5 |
| NB | NB | NB | NB | NB | NB |
| 0.4 | 0.4 | 0.48 | 0.43 | 0.45 | 0.4 |
| 368 | 365 | 374 | 383 | 385 | 375 |
| Nothing | Nothing | Nothing | Nothing | Nothing | Nothing |
| Good | Good | Good | Good | Good | Good |
Note: shrinking percentage is according to the physical size survey calculation of injecting molding die 210*140*2mm.
Table 3
The test data associative list 1 of table 2 is known, and comparative example 1 is not for add ABS and mineral filler, and the shrinking percentage of prepared alloy material is bigger than normal, and reprinting books in a reduce format obviously in injection-molded item wall thickness place, sprays paint and have stress cracking phenomenon, is not suitable for thick article and sprays paint application.Adopt fiberglass reinforced in comparative example 2, the toughness preparing alloy material is too poor, and the goods of institute's injection moulding are floating fine serious, cannot spray.Comparative example 3 and embodiment 1 contrast adding of chainextender, and the heatproof air aging performance of obtained alloy material is obviously different, and initial decomposition temperature differs 30 DEG C.In embodiment, the macromolecular chain of degraded is coupled by chainextender again, and lower-molecular substance content is less, and heat decomposition temperature significantly improves, in injection moulding process, there will not be degraded filamentary silver problem, make the complete processing window of material become larger, make material have wider suitable application area.
Claims (10)
1. a polycarbonate/polyethylene terephthalate, is characterized in that, is made up of the component of following weight percentage:
2. polycarbonate/polyethylene terephthalate according to claim 1, is characterized in that, is made up of the component of following weight percentage:
3. polycarbonate/polyethylene terephthalate according to claim 1, is characterized in that, the melting index of described polycarbonate is 8-20g/10min, test condition: 300 DEG C, 1.2kg.
4. polycarbonate/polyethylene terephthalate according to claim 1, it is characterized in that, the limiting viscosity of described polyethylene terephthalate is 0.5-1.2dl/g, test condition: adopt the phenol of volume ratio 1:1 and tetrachloroethane to be solvent.
5. polycarbonate/polyethylene terephthalate according to claim 1, is characterized in that, it is compound containing epoxide group or containing the compound having oxazoline group that described expansion connects agent.
6. polycarbonate/polyethylene terephthalate according to claim 1, is characterized in that, described mineral filler is one or both in mineral, whisker;
Described mineral are one or more in talcum powder, barium sulfate, glass microballon;
Described whisker is one or more in potassium titanate crystal whisker, aluminium borate whisker, silicon-dioxide whisker.
7. polycarbonate/polyethylene terephthalate according to claim 1, is characterized in that, described toughner is one or both in MBS toughner, EMA toughner;
Described MBS toughner be with polystyrene and methacrylic ester be shell, the anti-impact modifier of the divinyl nucleocapsid structure that is core;
Described EMA toughner is ethylene-methyl acrylate-glyceryl methacrylate terpolymer toughner.
8. polycarbonate/polyethylene terephthalate according to claim 1, it is characterized in that, described auxiliary agent is oxidation inhibitor and lubricant, with weight, the content of oxidation inhibitor is 0.1% ~ 2%, and the content of lubricant is 0.1% ~ 2%.
9. the preparation method of the polycarbonate/polyethylene terephthalate according to any one of claim 1 ~ 8, is characterized in that, comprises the following steps:
1) by after the mixing of the auxiliary agent of polyethylene terephthalate, acrylic nitrile-butadiene-styrene, mineral filler and partial amount, melt extrude through twin screw extruder, cool, pelletizing, obtain master batch;
2) by the first segment machine barrel place charging opening feeding of the auxiliary agent of polycarbonate, toughner, chainextender and residual content at twin screw extruder, master batch is in Section of five machine barrel charging opening feeding of twin screw extruder, through fusion plastification, extruding pelletization, system is to polycarbonate/polyethylene terephthalate.
10. the preparation method of polycarbonate/polyethylene terephthalate according to claim 9, is characterized in that, step 1) in, the temperature that melt extrudes of described twin screw extruder is 245 DEG C ~ 275 DEG C;
Step 2) in, the temperature that melt extrudes of described twin screw extruder is 245 DEG C ~ 300 DEG C.
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