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Influence of plastic impact modifier on plastic Products
Anti-impact modifier is an additive used to improve the impact performance of polymer materials, also known as toughening agent. At present, the auxiliaries are mainly used in rigid polyvinyl chloride, polystyrene, polypropylene, thermosetting epoxy resin and other plastic materials. Plastic packaging The toughening effect and mechanism of anti-impact modified jing on rigid polymers has become an important content in the research of polymer. At present, the most representative toughening theory has the theory of silver grain, the crack theory of shear yield and the toughening theory of rigid particle (RO).
The theory of silver grain holds that toughening materials, such as rubber, are used as stress concentrations in the plastic matrix. The plastic packaging induces the matrix to be "silver-textured" and shear yielding, making the matrix brittle and ductile transformation. Thus enhancing its toughness. Silver grain theory, the toughening material, such as rubber in the plastic matrix as a stress concentration, induced the matrix "silver grain" and shear yield, so that the seal occurs brittle and ductile transformation. Plastic packaging to improve its toughness. The theory of crack-initiation with shear yield is a further study of the theory of silver grain, the theory holds that when the toughening material is stressed, the plastic packaging can induce the crack and shear zone by forming stress concentration when the toughening material is deformed, and the impact strength of the material will be improved by absorbing a lot of impact.
The rigid particle toughening theory holds that under the action of stress field, the plastic packaging tomb has a compressive stress on the rigid tension, which causes the rigid particles to have a "cold pull" deformation, which absorbs the impact energy and enhances the impact strength of the material.
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