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Twin-screw granulator mixed with modified plastics

by:TENGDA     2022-09-29

There are two fundamental types of interactions between the two components in the interface layer: the two components build up chemical bonds, such as graft copolymer blends and block copolymers; the second type is that the two components rely solely on subvalent forces. (eg van der Waals forces, hydrogen bonds) separation. Since van der Waals force is ubiquitous, in addition to chemical bond connection between components in the interface layer of graft copolymer blends and block copolymers, there is also van der Waals force separation. In the game of ordinary thermo-mechanical blending modified plastic systems, if a solubilizer is added, in the process of thermo-mechanical blending, chemical reactions may occur in the sorting of components. In this way, the components in the interface layer will not be separated by secondary valence. There are also chemical bonds.


The better the compatibility of the twin-screw extruder, the greater the separation strength. Regarding the blending of two polymers with poor compatibility, not only the thickness of the interface layer is thin, but the separation strength between the components is also small, and the properties of the blend are also relatively poor, especially the mechanical properties, which are lower than those of the pure matrix resin. In order to increase the thickness of the interface layer, strengthen the separation strength between components, and obtain blended modified plastics with excellent properties, compatibilization technology is often used.


According to the wet-contact theory, the separation strength between the two components mainly depends on the interfacial tension. The smaller the interfacial tension, the greater the separation strength. The interfacial tension is related to temperature. According to the diffusion theory, the inter-annual separation strength of the Leon components mainly depends on the compatibility between the two components.


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