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SEBS is often added to the blending system as a compatibilizer and toughening agent. In order to increase the blending compatibility with the polymer and reduce the interfacial tension, it is necessary to carry out grafting solution modification or blending solution modification on SEBS.
The most common SEBS modification method is to graft it with maleic anhydride (MAH) to increase the molecular polarity, making it compatible with some polymers.
[such as polyamide (PA)] compatibility, many research results show that SEBS-g-MAH is a good reactive compatibilization of PPO/PA66 blends, which effectively improves the interaction between the PPO/PA66 phase interface force, making the dispersed phase in the base particles smaller and uniform, becoming a stable sub-microscopic dispersion state. The addition of SEBS… gMAH has a good effect on the tensile strength, flexural strength and Izod notched impact strength of PPO/PA66 alloy. There is an improvement, but the rigidity and heat resistance are slightly reduced, and the cost of the alloy is greatly increased; therefore, the use of 5~10 parts of SEBS-g-MAH can obtain a PPO/PA66 alloy with excellent comprehensive properties. With SEBS-g-MAH - With the addition of g- -MAH, the glass transition temperature of PA66 in the blend system increases, and the glass transition temperature of PPO decreases, whether PPO is the continuous phase or PA66 is the continuous phase, and SEBS- g- - As the MAH increases, the greater the change in glass transition temperature.
| Test item | Test data | Test method |
| density | 0.91 g/cm³ | ASTM D792 ISO 1183 |
| Melting index | 2-9 (190ºC,50kg) g/10min | ASTM D1238 ISO 1133 |
| Grafting rate | Medium | acid-base titration |
| Appearence | white or light yellow Granular |
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