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A technology of plastic alloys and metal salts, applied in the field of plastic alloys and their preparation, can solve the problems of low temperature impact resistance, low polycarbonate toughness, and impact properties, etc., and achieve complementary advantages of components and excellent low temperature impact resistance. , the effect of excellent wear resistance
Active Publication Date: 2019-01-04
KINGFA SCI & TECH CO LTD
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Problems solved by technology
However, due to its poor wear resistance and solvent resistance, polyethylene terephthalate (PET) has good solvent resistance and wear resistance as a crystalline material, so people prepare PC / PET alloys to improve polycarbonate The characteristics of poor wear resistance and solvent resistance, but the addition of polyethylene terephthalate will also reduce the toughness of polycarbonate, resulting in a decrease in its impact performance, especially the decline in low temperature impact resistance, which restricts PC / Application of PET alloy in low temperature field
[0003] The patent application with the application number 201710139597.1 discloses a heat-resistant and solvent-resistant PC / PET modified resin, which introduces a polymer compatibilizer containing reactive epoxy functional groups into the PC / PET modified resin, and inhibits the transesterification reaction. To obtain better heat resistance, however, the patent application number 201710139597.1 does not solve the problem of low-temperature toughness decrease of PC / PET modified resin
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Embodiment 1
[0028] An embodiment of the plastic alloy of the present invention, the composition of the plastic alloy in this embodiment is shown in Table 1.
[0029] The preparation method of plastic alloy described in the present embodiment is:
[0030] (1) Weigh each component in the plastic alloy in proportion, and put it into a high-mixer, fully mix it evenly, and obtain the mixture;
[0031] (2) Add the mixture obtained in step (1) into a twin-screw extruder to extrude and granulate to obtain the plastic alloy; wherein, the temperature of each zone of the twin-screw extruder is 200-270° C., and the feeding speed is 15 -40kg / h, the rotational speed of the screw is 150-450r / min.
Embodiment 2～8
[0033] The components of the plastic alloys described in Examples 2-8 are all shown in Table 1, and the preparation methods of the plastic alloys described in Examples 2-8 are the same as in Example 1.
[0034] At the same time, the following properties of the plastic alloys described in Examples 1-8 were tested: -40°C notched impact strength, -40°C Dupont impact strength, solvent resistance (glacial acetic acid), dry wear resistance, wet wear resistance. Among them, the test methods for each performance are:
[0035] -40℃ notched impact: reference standard ISO 180;
[0036] -40°C DuPont impact: Cool the 100mm×100mm×2mm square plate in a low-temperature freezer at -40°C for 6 hours, and quickly take it out for low-temperature Dupont impact; the DuPont impact specification weight is 2kg, and the impact cone radius is 1 / 8in;
[0037] Solvent resistance: Fix the ISO tensile spline on a curved surface fixture with a curvature of 1, brush the corresponding solvent in the middle of...
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Abstract
The invention relates to plastic alloy and a method for preparing the same, and belongs to the technical field of high-polymer materials. The plastic alloy comprises, by weight, 1-90 parts of polycarbonate, 1-90 parts of siloxane copolymerization polycarbonate, 1-90 parts of polyethylene terephthalate, 0.01-3 parts of nucleating agents, 0-10 parts of toughening agents and 0-10 parts of compatilizer. The plastic alloy and the method have the advantages that the rigidity and the heat resistance of the polycarbonate, the low-temperature impact resistance of the siloxane copolymerization polycarbonate and the solvent resistance, the excellent forming properties and the excellent abrasion resistance of the polyethylene terephthalate are integrated in the polycarbonate/siloxane copolymerizationpolycarbonate/polyethylene terephthalate plastic alloy; phase-state structures of resin can be adjusted by the nucleating agents, the superior performance of three components are kept at the high levels, accordingly, effects of complementing the superiority of the components can be realized, and the plastic alloy prepared by the aid of the method is excellent in low-temperature impact resistance,solvent resistance and abrasion resistance.
Description
technical field [0001] The invention relates to a plastic alloy and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polycarbonate (PC) is an engineering plastic with a balance of rigidity and toughness, which is widely used in the fields of electronic appliances, rail transit and aerospace. However, due to its poor wear resistance and solvent resistance, polyethylene terephthalate (PET) has good solvent resistance and wear resistance as a crystalline material, so people prepare PC / PET alloys to improve polycarbonate The characteristics of poor wear resistance and solvent resistance, but the addition of polyethylene terephthalate will also reduce the toughness of polycarbonate, resulting in a decrease in its impact performance, especially the decline in low temperature impact resistance, which restricts PC / The use of PET alloys in the field of low temperature. [0003] The patent application with the applic...
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