Impact Modifier MBS Resin For PVC and The mechanism of rubber toughening plastic
Impact modifier MBS resin for PVC and The Mechanism of Rubber Toughening plastic
MBS additives are commonly known as MBS resin. As one of the most important impact modifier of PVC, MBS resin can maintain the transparency of PVC at the same time as toughening, and at the same time, compared with other impact modifiers, can be more substantial to enhance the toughness of products, which is widely used in PVC and PBT /PC and other engineering plastics processing applications.
Chinese name MBS additives commonly known as MBS resin type PVC one of the most important impact modifier.
2 rubber toughening the mechanism of plastic
As one of the most important impact modifiers of PVC, MBS resin can maintain the transparency of PVC at the same time as toughening, and at the same time, compared with other impact modifiers, Can be more substantial to enhance the toughness of products, which is widely used in PVC and PBT / PC and other engineering plastics processing applications.
Rubber toughening the mechanism of plastic editing
In glassy materials (such as PVC resin) under stress caused by material damage causes, is the material forced to high elastic deformation. If the deformation parts are impurities, fillers, voids, bubbles and other structural defects, stress easily concentrated in the weak parts, so that the rapid development of rupture, resulting in the material is much lower than the theoretical average strength has been destroyed. Pure PVC resin is a brittle material, continuous glass phase can not prevent the crack under the stress of the dramatic expansion, and finally the formation of cracks and crack rupture, so the impact resistance is poor. Improve the impact resistance of brittle materials, widely used method is to carry out rubber toughening. From the 50s onwards, people began to study the material toughening mechanism of the material, has put forward a variety of different theories, such as the direct absorption of energy theory, yield expansion theory, crack core theory, crazing - shear zone theory and silver Theory, and continue to develop and improve, and gradually establish a rubber toughening mechanism of the initial theoretical system. The two important conclusions drawn from the above theory are that the impact strength of the toughening material is related to the exponential function of the number of rubber particles in the system. Second, the rubber particles can effectively branch the grain and its diameter should not be less than the thickness , Otherwise it will be buried in the crocodile and does not work.