Application of multi-element random copolymer in improvement of phase state structure and phase state stability of polyester/styrene resin alloy
A styrene-based resin and random copolymer technology, applied in the field of special compatibilizers, can solve the problems of re-aggregation of dispersed phases, large differences in solubility parameters between polyester and styrene-based resins, and easy phase separation, etc., to achieve High efficiency, good cost performance, and good thermal stability
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[0035] Example 1-4
[0036] According to the raw material composition ratio in Table 1, a special compatibilizer for improving the phase distribution and stability of polyester / styrene resin alloy was prepared. Examples 1-4, 14 and Comparative Example 1-2 (Preparation Method Consistent with the embodiment, regular adjustment of feeding). And these compatibilizers are used to prepare polyester / styrene resin alloys to study the improvement of the phase state and phase stability of such alloys.
[0037]
Example
[0038] Examples 5-9
[0039] PC resin is selected from Teijin Corporation’s PCI250WP (relative number average molecular weight is 22000g / mol, glass transition temperature is 140℃); ABS resin is selected from Korea Kumho Petrochemical’s P / D190 (relative weight average molecular weight is 120,000g / mol, of which The butadiene weight percentage content is 50%, the acrylonitrile weight percentage content is 15%, and the styrene weight percentage content is 35%.
[0040]
[0041] Put the above-mentioned components into a high-mixer in proportion to mix for 3 minutes, discharge the material, and then extrude and pelletize with a screw extruder. The processing temperature is 220~260℃, and the screw rotation speed is 300 rpm; high-mixer The speed of the twin-screw extruder is 2000rpm, and the aspect ratio of the twin-screw extruder is 36.
[0042] The particles prepared according to Examples 5 to 8 were conventionally injection molded into sheets, samples 1 to 4, respectively. The samples we...
Example Embodiment
[0045] The phase structure of Examples 5 and 6 is different, combined image 3 In the scanning electron microscope, the injection molded parts of Example 5 and Example 6 were sampled at the near gate position and the far gate position, and sliced and analyzed the phase structure by transmission electron microscope to observe the phase stability. In order to illustrate the influence of the compatibilizer of the present invention on the stability of the alloy phase distribution, a large mold was used for conventional injection molding to prepare injection molded parts with a length of 30 cm and a width of the standard width of the notched impact spline. The splines closest to the gate and the most Test the spline far away from the gate; it can be seen that in the injection mold, due to the existence of the shear-tension force field, the phase structure of Example 6 is unstable, and the phase structure at the far gate position is relatively close to the gate In other words, a cer...
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