CN110746758B - Preparation method of PC-ABS alloy material - Google Patents
Preparation method of PC-ABS alloy material Download PDFInfo
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Abstract
The invention discloses a preparation method of a PC-ABS alloy material, which comprises the following steps of taking 65-75 parts of PC resin; 25-35 parts of ABS resin, 1-2 parts of compatilizer; 0.1-1 part of a lubricant; 3-5 parts of sulfonated SBS resin; the sulfonation degree is 0.3 mmol/g-0.6 mmol/g; and drying the PC resin and the ABS resin, adding the rest raw materials, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain the alloy material particles. According to the invention, the components of the PC/ABS alloy material are optimized, the SBS additive is modified, and the sulfonated SBS is added with the sulfonic group, so that the chemical polarity and the spatial structure of the SBS are changed, and further the matte degree of the alloy material is influenced.
Description
Technical Field
The invention relates to the technical field of chemical materials, in particular to a preparation method of a PC-ABS alloy material.
Background
PC/ABS (Polycarbonate/acrylonitrile-butadiene-styrene) copolymer and mixture are thermoplastic plastics formed by combining Polycarbonate (Polycarbonate) and acrylonitrile-butadiene-styrene copolymer (ABS), combine the excellent characteristics of the two materials, and have the moldability of the ABS material, the mechanical property, the impact strength, the temperature resistance, the Ultraviolet (UV) resistance and other properties of PC, and the color is transparent-free particles, so that the PC/ABS can be widely used in automobile interior parts, business machines, communication equipment, household appliances and lighting equipment.
Automotive interior materials generally have a matte requirement, which is beneficial to reducing visual fatigue of drivers, thereby improving driving safety. The PC/ABS has good comprehensive performance, but because the surface gloss is higher, secondary processing such as matte paint spraying and the like is needed to realize the matte and beautiful effects. With the advent of automotive ELV regulations, spray-free, environmentally friendly solutions are needed to achieve direct recycling of articles. The spraying-free solution can not only greatly reduce the cost, but also reduce the environmental pollution caused by the paint spraying process.
In order to solve the above problems, it is necessary to develop a matte or low gloss PC/ABS material. It is common in the art to choose to add a partial matte material to the alloy material or to modify the composition of the alloy material to reduce the gloss.
For example, document 1: research on PC _ ABS matte alloys, by Chun; it discloses that:
the addition of various flatting agents can reduce the glossiness of the alloy in different degrees, the reduction degree of the matte degree gradually becomes slow and stable along with the increase of the addition amount, and the use amount of the flatting agent is preferably 2-6 parts.
The addition of the flatting agent 1 and the flatting agent 2 has no influence on the mechanical property of the PC/ABS alloy, the addition of the flatting agent 3 enables the bending modulus of the alloy to be seriously reduced, and the addition of the flatting agent 4 enables the impact strength of the alloy to be greatly reduced.
As is known from the content of document 1, the matting agent 3 is an ethylene-methyl acrylate-glycidyl methacrylate copolymer (AX 8900); matting agent 4 is BMAT; semi-crosslinked styrene-acrylonitrile random copolymer SAN.
As can be seen from document 1, the matting agents do not have a uniform chemical structural formula and do not belong to a uniform type of polymerized monomer; and the performance of various matting agents on the alloy material is also different. Since the matting agents 1 and 2 are self-made products, the chemical structures thereof are not verified, but are superior to the matting agents 3 and 4 from the experimental comparison of document 1. The matting agents 3 and 4 are known chemical resins, but the effects of the two on the properties of the alloy resin are different, and for example, the matting agent has a large effect on the flexural modulus and the matting agent 4 has a large effect on the impact strength.
From the above studies, the selection of the matting agent is not uniform, and the influence of different matting agents on the alloy material is unpredictable.
Therefore, one of the problems to be solved by the present invention is: the matting agent different from the matting agent in the document 1 is selected, so that the matting agent can achieve a good matte effect, and has low or no influence on the mechanical properties of the PC/ABS alloy material.
In addition, the PC/ABS alloy material has a wide application range, and the use and replacement period is often long. For example, when the PC/ABS alloy material is used as an automobile bumper or a protective plate, a user generally does not actively replace the PC/ABS alloy material when the PC/ABS alloy material is not damaged by collision, which puts high requirements on the good mechanical properties of the PC/ABS alloy material under the action of the external environment, and particularly, after the PC/ABS alloy material is used for a long time, the mechanical properties of the PC/ABS alloy material are reduced to a low degree, namely, the aging rate is slow.
Document 2: the research on the degradation mechanism and high-valued recycling of waste PC/ABS alloy, the author Wang Asia Fei; document 2 discloses:
in the degradation process of PC/ABS, the peak intensity of infrared characteristic absorption peaks of carbonyl and hydroxyl is increased, and the phenomenon is observed in the infrared spectrums of PC phase and ABS phase in PC/PBS alloy. The PC phase in the PC/ABS alloy is also degraded in various modes such as photo-oxidative degradation, thermal degradation, hydrolysis and the like, the carbon-carbon double bond in the ABS phase is also damaged easily as polybutadiene, and then the lipid group in the PC phase is also damaged, but besides the change of the molecular chain structure, the phase structure of the PC/ABS alloy as a multiphase blend may be changed.
Document 3: influence of UV-234 on the thermal oxygen aging resistance of PC/ABS alloys, Zhou Ning by authors, etc.; disclosed is a method for producing:
research results show that in the thermal-oxidative aging process, the oxygen concentration on the surface of the alloy is far higher than that in the interior, so under the action of thermal oxygen, oxidation reaction is firstly carried out on the surface of the alloy to generate an oxidation thin layer, the alloy is hardened, and the tensile strength of the alloy material is increased. In addition, the interface between the rubber phase and the plastic phase in the ABS is damaged, the compatibility of the two-phase interface is reduced, the ABS is changed from toughness to brittleness, the physical and mechanical properties of the alloy are deteriorated, and the elongation at break and the impact strength are greatly reduced.
The UV-234 plays a role of a similar phenol antioxidant, the generation of free radicals in the aging process of the alloy is better inhibited, so that the aging chain scission and the generation of polar chromophoric groups of the alloy are effectively prevented, the thermo-oxidative aging resistance of the alloy is improved, and in the later stage of thermo-oxidative aging, the inhibition effect on the free radicals in the aging process of the alloy is gradually lost due to the change of the molecular structure of the UV-234, the thermo-oxidative aging speed of the alloy is accelerated, the mechanical property of the alloy is sharply reduced, and the yellowing degree of the alloy is increased. Document 3 improves the antioxidant aging performance of the alloy material by adding an antioxidant or an aging inhibitor.
However, aging of plastic alloy materials is a result of the combined action of various conditions, including photo aging, and high temperature oxidation. The method disclosed in document 3 is to add an ultraviolet absorber to the composition, which can perform good photooxidation but has a weak influence on hydrolytic aging and chemical corrosion aging.
In order to solve the problems, various auxiliary agents such as an antioxidant, an anti-hydrolysis agent, an anti-photosensitizer and the like can be added in the prior art, but most of the components have different polarities and are difficult to unify, so that the dissolution effect is poor, and unpredictable influence is further generated on the mechanical property of the alloy material.
Therefore, another technical problem of the present invention is to improve the overall anti-aging effect of the plastic alloy while minimizing the amount of additives.
In addition, SBS is used as a common component in PC/ABS alloy materials, and is mainly used as a toughening agent to improve the toughness of the alloy materials.
Disclosure of Invention
The invention aims to provide a preparation method of a PC-ABS alloy material, so that the prepared alloy material has a good matte effect, and the addition of a matte agent has low or no influence on the mechanical properties of the PC/ABS alloy material; meanwhile, the service life of the alloy material can be prolonged, and the aging process of the alloy material is delayed.
In order to achieve the above object, an embodiment of the present invention provides a method for preparing a PC-ABS alloy material, comprising the following steps:
(1) preparing raw materials by weight:
65-75 parts of PC resin; 25-35 parts of ABS resin;
1-2 parts of a compatilizer; 0.1-1 part of a lubricant;
3-5 parts of sulfonated SBS resin; the sulfonation degree is 0.3 mmol/g-0.6 mmol/g;
(2) and drying the PC resin and the ABS resin, adding the rest raw materials, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain the alloy material particles.
In a preferred embodiment of the invention, the compatibilizer is ABS-g-MAH.
In a preferred embodiment of the present invention, the lubricant is one of paraffin, fatty acid salt or stearate.
In the preferable scheme of the invention, the weight average molecular weight of the PC resin is 20000 g/mol-30000 g/mol; the vitrification temperature is 140-160 ℃; the weight average molecular weight of the ABS resin is 120000-150000 g/mol.
In the preferred scheme of the invention, the temperature of a screw cylinder of the screw extruder is 220-280 ℃; the rotating speed of the screw extruder is 280 r/min-400 r/min.
In the preferred scheme of the invention, the preparation method of the sulfonated SBS resin comprises the following steps: adding SBS resin into cyclohexane to dissolve; slowly dropwise adding concentrated sulfuric acid under the stirring condition for continuous reaction, and controlling the reaction temperature to be 30-45 ℃; and after the reaction is finished after 90-150 min, adding water to boil, and removing sulfuric acid to obtain the sulfonated SBS resin.
In summary, the invention has the following advantages:
according to the invention, the components of the PC/ABS alloy material are optimized, the SBS additive is modified, and the sulfonated SBS is added with the sulfonic group, so that the chemical polarity and the spatial structure of the SBS are changed, and further the matte degree of the alloy material is influenced.
The sulfonated SBS resin reacts with PC, so that the microroughness of the surface of the material is increased, and the glossiness of the alloy is reduced.
Drawings
FIG. 1 is a graph showing the results of the gloss tester in the first experiment of the present invention;
FIG. 2 is a graph of the results of optical micro-scanning in the first experiment of the present invention.
Detailed Description
The invention provides a preparation method of a PC-ABS alloy material, which comprises the following steps:
(1) preparing raw materials by weight:
65-75 parts of PC resin; 25-35 parts of ABS resin
1-2 parts of a compatilizer; 0.1-1 part of a lubricant;
3-5 parts of sulfonated SBS resin; the sulfonation degree is 0.3 mmol/g-0.6 mmol/g;
(2) and drying the PC resin and the ABS resin, adding the rest raw materials, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain the alloy material particles.
The compatilizer and the lubricant can adopt the compatilizer and the lubricant which are commonly used in PC/ABS in the prior art, and the compatilizer can influence the mechanical property of the material through a plurality of tests, but the compatilizer and the lubricant do not influence the function of the sulfonated SBS, so the influence between the compatilizer and the sulfonated SBS is not elaborated in the specification of the invention.
The lubricant is also a conventional lubricant, has very low additive amount, has no direct influence on the performance of an alloy material, and does not generate a synergistic effect or an inhibition effect with the sulfonated SBS. Therefore, the specification of the invention can test the mechanical property, the integral anti-aging effect and the matte effect of the sulfonated SBS on the PC/ABS alloy material.
Example 1:
the invention discloses a preparation method of PC/ABS alloy material
(1) Preparing raw materials by weight:
70 parts of PC resin; 30 parts of ABS resin; 2 parts of compatilizer ABS-g-MAH; 0.5 part of lubricant paraffin;
5 parts of sulfonated SBS resin; the degree of sulfonation was 0.5 mmol/g.
(2) Drying the PC resin at 100 ℃ for 3h, drying the ABS resin at 110 ℃ for 2h, adding the compatilizer, the lubricant and the sulfonated SBS, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain the alloy material particles.
The screw extruder can be divided into 9 heating zones, and the temperatures are respectively set to be 220-230 ℃, 230-240 ℃, 240-250 ℃, 250-260 ℃, 260-270 ℃, 270-280 ℃, 260-270 ℃ and the head temperature is 240-250 ℃; the rotating speed of the feeding rod is 12 r/min; the rotating speed of the screw of the main machine is 350 r/min.
The raw materials of the invention are selected from:
the PC resin is selected from PC resin particles with the model of PC-110 produced by Taiwan Qimei industry; the weight average molecular weight of the PC resin is 20000 g/mol-30000 g/mol; the vitrification temperature is 140-160 ℃;
the ABS resin is selected from ABS resin particles with the model of PA-765A produced by Taiwan Qimei industry; the weight average molecular weight of the ABS resin is 120000-150000 g/mol;
the compatilizer ABS-g-MAH is selected from the compatilizer ABS-g-MAH with the model number ZT-56, which is produced by Zhentong Plastic science and technology Limited in Changle county;
the lubricant paraffin is selected from food-grade lubricants produced by International trade company of Dalian and Union of China;
the sulfonated SBS resin is self-made.
The preparation method of the sulfonated SBS resin comprises the following steps: adding SBS resin into cyclohexane to dissolve; slowly dropwise adding concentrated sulfuric acid under the stirring condition for continuous reaction, and controlling the reaction temperature to be 40 ℃; after the reaction is finished after 120min, adding water to boil, removing sulfuric acid, and drying to obtain the sulfonated SBS resin.
Control test:
preparation method of PC/ABS alloy material
(1) Preparing raw materials by weight:
70 parts of PC resin; 30 parts of ABS resin; 2 parts of compatilizer ABS-g-MAH; 0.5 part of lubricant paraffin;
and 5 parts of an auxiliary agent.
(2) Drying PC resin at 100 ℃ for 3h, drying ABS resin at 110 ℃ for 2h, adding a compatilizer, a lubricant and an auxiliary agent, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain alloy material particles.
The screw extruder can be divided into 9 heating zones, and the temperatures are respectively set to be 220-230 ℃, 230-240 ℃, 240-250 ℃, 250-260 ℃, 260-270 ℃, 270-280 ℃, 260-270 ℃ and the head temperature is 240-250 ℃; the rotating speed of the feeding rod is 12 r/min; the rotating speed of the screw of the main machine is 350 r/min.
The control experiment and example 1 were conducted using the same manufacturing process except that the sulfonated SBS resin was replaced with a different additive to verify the effect of the sulfonated SBS resin.
Factors influencing the performance of PC/ABS alloy material
The experimental method comprises the following steps: the PC/ABS alloy is prepared by the method of example 1 or a control experiment, the basic components and the preparation method of each experimental example are the same, and only the auxiliary materials are different.
The basic component comprises 70 parts of PC resin; 30 parts of ABS resin; 2 parts of compatilizer ABS-g-MAH; 0.5 part of lubricant paraffin. The addition amount of the auxiliary materials is 5 parts.
The adjuvants in each experimental example are shown in table 1:
table 1: components of the respective Experimental examples in experiment I
The conventional SBS resin is unmodified SBS resin, does not contain sulfonic acid groups, and has different chemical structures and chemical properties from SBS; both do not belong to the same substance. SBS, MBS, and EMA are common toughening agents.
Experiment one: influence of different auxiliary materials on matte effect of PC/ABS alloy material
The experiment can verify the matte effect of different toughening agents on the alloy material, and can verify the effect difference between the sulfonated SBS resin and the non-sulfonated SBS resin.
The matte effect test method comprises the following steps:
(1) and (3) testing the glossiness: testing the glossiness of the sample piece according to GB/T8807-1988, wherein the testing angle is 60 degrees; the glossiness instrument is a high-precision glossiness meter manufactured by Shenzhen Shenshi science and technology Limited, and the model is YG 60; the test results are shown in fig. 1.
(2) And (3) testing by an optical microscope: the sample was injection molded into a 100 mm diameter piece and the surface topography near the center point was observed at 500 times magnification with the results shown in figure 2.
As can be seen from fig. 1, the gloss results of experimental example 2 and experimental example 5 are similar, which indicates that the influence of EMA on gloss is very weak and has no significant influence, the gloss of experimental example 4 is 75.8, the gloss of experimental example 2 is 89.2, which indicates that the gloss can be slightly reduced after MBS is added on the basis of experimental example 2, but the effect still does not meet the matte requirement.
In the experimental example 3, the conventional SBS resin is added on the basis of the experimental example 2, so that the glossiness can be obviously reduced, and the alloy material can have a certain matte effect after the conventional SBS resin is added.
In the experimental example 1, the sulfonated SBS resin is added on the basis of the experimental example 2, the gloss test effect is the lowest, and the matte effect is the best after the alloy material is added. Meanwhile, compared with the experimental example 3, the glossiness of the sulfonated SBS is reduced by about 58%, and the sulfonated SBS has a better matte effect compared with the unmodified SBS.
Compared with a chemical mechanism, the sulfonated SBS is prepared by grafting a sulfonic acid group into a butadiene chain segment and a styrene chain segment containing chemical activity; the cohesive strength of SBS is increased and the polarity is increased by introducing sulfonic group with higher polarity; these properties change the surface gloss of the material after the synthesis of the two main resins when the SBS main chain and the PC/ABS resin are subjected to cross-linking reaction.
Experiment two: experiment for influence of toughening agent on mechanical strength of alloy material
The experiment can verify the mechanical influence of different toughening agents on the alloy material
The experimental method comprises the following steps:
testing the tensile strength of the sample according to GB/T1040-2006, wherein the test speed is 50 mm/min;
the samples were tested for notch impact strength according to GB/1843-.
Experimental example 6: the auxiliary materials in experimental example 6 used epoxidized SBS resin;
experimental example 7: the auxiliary material in the experimental example 7 is the SBS grafted by grafting maleic anhydride.
The preparation methods of the auxiliary materials in experimental examples 6 and 7 can be referred to in the literature "the modification progress of SBS and the application thereof in adhesive", and the authors have strong plum red.
The tensile strength and notched impact strength of experimental examples 1 to 3, 6 and 7 were measured using the above-described experimental methods, and the test results are shown in table 2:
table 2: mechanical experiment detection result
| Group of | Auxiliary materials | Tensile strength | Notched impact strength |
| Experimental example 1 | Sulfonated SBS resin | 52.6 | 39.8 |
| Experimental example 2 | Is free of | 32.4 | 48.2 |
| Experimental example 3 | Conventional SBS resins | 51.9 | 28.6 |
| Experimental example 6 | Epoxidized SBS | 52.3 | 27.8 |
| Experimental example 7 | Grafted SBS | 50.4 | 25.4 |
As can be seen by comparing the experimental example 2 with the experimental example 3, the experimental example 6 and the experimental example 7, after the three types of SBS of the toughening agent are added, the tensile strength of the alloy material is obviously improved, but the notch impact strength of the alloy material is also obviously reduced. In comparison with experimental example 2, the tensile strength of the modified sulfonated SBS was also significantly improved, and the notch impact strength was also decreased, but the decrease was much lower than that of the unmodified SBS resin, the epoxidized SBS resin, and the grafted SBS resin.
It can be seen from the comparison between experimental example 1 and experimental example 3 that the tensile strength of the alloy material is not significantly improved but the notch impact strength is significantly improved by more than 39% after the conventional SBS resin is replaced by the sulfonated SBS resin. Therefore, the influence of the SBS resin on the notch impact strength of the alloy material can be reduced by the sulfonated SBS resin, and other products obtained by SBS modification do not have the effect. After sulfonic groups are introduced into SBS resin, the polarity of chains at two ends is improved, and the SBS resin can generate a microgel effect of chemical crosslinking with ABS/PC, so that a micro-roughness effect is caused on the surface of a material, a matte effect is achieved, and the SBS resin has a good effect in ABS and PVC alloy materials.
The impact strength of the ABS alloy material is obviously reduced along with the increase of the dosage of SBS. This is mainly because, in the ABS composite material containing, as the amount of SBS used increases, the particles formed become larger and the particles of the dispersed phase that are too large are forced to deform under large stress, becoming stress concentration points, resulting in deterioration of the properties of the material, and the content of the effective toughening agent gradually decreases as the amount of SBS used increases, resulting in a sharp decrease in the impact strength of the material as the amount of SBS used increases. However, the particles formed by the sulfonated SBS resin in the melting process are smaller and are more uniformly dispersed in the PC/ABS composite material, so that the particles can be more uniform when bearing stress compared with the conventional SBS or other modified ABS, the particles are more dispersed when becoming stress concentration points, and the degradation effect on the notch impact strength is reduced, so that the notch impact strength is obviously improved compared with the rest of experimental examples in which SBS is added although the notch impact strength is lower than that of the example 2.
Another technical problem of the present invention is to improve the overall anti-aging effect of plastic alloys while minimizing the amount of additives. Therefore, the anti-aging effect of the invention is verified by the following experiments; the anti-aging effect is mainly investigated
Experiment three: anti-ultraviolet aging effect and thermal oxidation aging effect contrast
The experimental detection method comprises the following steps:
thermal oxygen aging test: GB/T7141-2008 is adopted; the experimental temperature is 110 ℃, and the experimental time is 400 h;
ultraviolet aging test: GB/16422.3-2014 is adopted;
light source: UV lamp tubes UVA and UVB; spectral range: ultraviolet band (280-400 rm).
The UV aging detection adopts a fluorescent ultraviolet lamp as a light source, and an accelerated weather resistance test is carried out on the material by simulating ultraviolet radiation and condensation in natural sunlight so as to obtain the weather resistance result of the material.
The composition of each experimental example in experiment three is as follows:
| blank group | Experimental example 31 | Experimental example 32 | Experimental example 33 | Experimental example 34 | Experimental example 35 | |
| Base component | Is provided with | Is provided with | Is provided with | Is provided with | Is provided with | Is provided with |
| Sulfonated SBS | 5 portions of | 5 portions of | ||||
| Conventional SBS | 5 portions of | |||||
| Epoxidized SBS | 5 portions of | |||||
| Uvioresistant agent 234 | 1 part of | 1 part of | ||||
| Antioxidant 2246 | 1 part of | 1 part of |
The five experimental examples adopt the method disclosed by the third experiment to carry out artificial aging, and the tensile strength and the notch impact strength before and after aging are tested after the experiment is finished; the results are shown in Table 3:
table 3: test results of the third experiment
As can be seen from table 3, the order of the reduction rate of the tensile strength is:
experimental example 35, experimental example 34, experimental example 31, experimental example 33, blank group, and experimental example 32.
The reduction rate sequence of the notch impact strength is as follows:
experimental example 35, experimental example 34, experimental example 32, experimental example 33, and blank group.
Because the notch strength is reduced after the sulfonated SBS is added, the invention calculates the effect of the auxiliary materials and other reagents on anti-aging by the reduction rate which is the ratio of the difference between the value before presbyopia and the value after aging to the value before presbyopia.
In experimental example 34, the anti-ultraviolet agent and the antioxidant are added, so that the reduction rate itself is low, which indicates that the anti-ultraviolet agent and the antioxidant have corresponding anti-oxidation and anti-light effects.
In experimental example 32 and experimental example 33, a conventional SBS resin and an epoxidized SBS resin were added, and the reduction rates of the blank group, experimental example 32, and experimental example 33 were about 70%, which significantly changed from those of the other 3 experimental examples, i.e., the reduction rates of the three experimental examples were high, indicating that the aging degree was severe.
In the experimental example 31, the sulfonated SBS resin was added, and the reduction rate was lower than those in the experimental examples 32 and 33, which indicates that the alloy material in the experimental example 31 was aged more effectively. From the composition analysis of the alloy materials, it can be seen that experimental examples 31 to 33 are only the replacement of different SBS resins, the conventional SBS resin and the epoxidized SBS resin added in experimental examples 32 and 33 cannot have good aging resistance, and the aging resistance can be retarded by using the sulfonated SBS resin; but still has a significant gap compared to the experimental examples in which the antioxidant and the anti-ultraviolet agent are added, and thus the anti-aging effect of even the sulfonated SBS cannot achieve the effect of the anti-aging agent.
Therefore, the effect of the sulfonated SBS and the two age resistors is verified through the experimental example 35, and the reduction rate of the experimental example 35 is the lowest from the data, so that the sulfonated SBS and the age resistor do not have the mutual inhibition effect.
The invention aims to improve the matte effect through the modified sulfonated SBS resin and eliminate or reduce the negative effect of the SBS resin on notch impact resistance; in an anti-aging experiment, the composite material added with the sulfonated SBS resin has a better anti-aging effect, so that the invention also solves the problem of improving the anti-oxidation and anti-ultraviolet capabilities of the resin material.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (4)
1. The preparation method of the PC-ABS alloy material is characterized by comprising the following steps:
(1) preparing raw materials by weight:
65-75 parts of PC resin;
25 to 35 portions of ABS resin
1-2 parts of a compatilizer;
0.1 to 1 portion of lubricant;
3-5 parts of sulfonated SBS resin; the sulfonation degree is 0.3 mmol/g-0.6 mmol/g;
(2) drying the PC resin and the ABS resin, adding the rest raw materials, uniformly mixing by using a blender, heating and extruding by using a screw extruder, cooling and granulating after extruding to obtain alloy material particles;
the compatilizer is ABS-g-MAH;
the lubricant is one of paraffin, fatty acid salt or stearate.
2. The method of claim 1, wherein: the weight-average molecular weight of the PC resin is 20000 g/mol-30000 g/mol; the vitrification temperature is 140-160 ℃; the weight average molecular weight of the ABS resin is 120000 g/mol-150000 g/mol.
3. The method of claim 1, wherein: the temperature of a screw cylinder of the screw extruder is 220-280 ℃; the rotating speed of the screw extruder is 280 r/min-400 r/min.
4. The method of claim 1, wherein: the preparation method of the sulfonated SBS resin comprises the following steps: adding SBS resin into cyclohexane to dissolve; slowly dropwise adding concentrated sulfuric acid under the stirring condition for continuous reaction, and controlling the reaction temperature to be 30-45 ℃; after the reaction is finished after 90-150 min, adding water to boil, and removing sulfuric acid to obtain the sulfonated SBS resin.
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| CN201911145035.3A CN110746758B (en) | 2019-11-21 | 2019-11-21 | Preparation method of PC-ABS alloy material |
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