EPDM rubber powder has excellent corrosion resistance and anti-aging properties. It is mostly used in the laying of outdoor stadiums, runways, playgrounds and other outdoor venues or used in rubber products to improve the anti-aging properties of rubber products and reduce production costs. . EPDM powder can also be used in PP materials to improve the physical and mechanical properties of pure PP materials. So how can EPDM rubber be used in PP materials?
Studies have shown that, with the increase of EPDM powder, the hardness of PP material will gradually decrease, the tensile strength will increase first and then decrease, and the thermal stability will increase significantly. This is inseparable from the performance characteristics of EPDM rubber products. Therefore, the use of ethylene propylene terpolymer powder in PP materials is one of the methods to improve the overall performance of PP materials. However, in the course of use, excessive use of EPDM powder may cause some physical properties of the PP material to decrease, which requires reasonable control.
1. The blending of EPDM rubber powder will cause the hardness of PP material to decrease. The use of EPDM rubber powder to produce high hardness products in PP materials requires additional measures to be taken at the same time as adding EPDM powder. Material hardness.
2. The tensile strength of PP materials will increase first and then decrease with the increase of EPDM powder content. This is because the amount of EPDM rubber powder is too high to be aggregated and cannot be uniformly dispersed in the PP material matrix. As a result, the tensile strength of the PP material decreases significantly; therefore, the blending amount of the Sanyuanyi rubber powder in the PP material is preferably controlled to 15-20 parts, which can reduce the amount of the PP material and can also stretch the PP material. The highest point of strength increase.
3. With the increasing use of EPDM powder, the bending strength of PP material will increase first and then decrease sharply. This is because of the amount of EPDM rubber scorch, PP material and EPDM powder. The compatibility is good, the binding force between the molecular interfaces is strong, and the bending strength of the PP material is obviously increased; but the aggregation of the rubber powder caused by the excessive use of the EPDM rubber powder will reduce the binding force between the EPDM rubber powder and the PP material. Lead to a sharp drop in bending strength of the PP material.
4. Impact strength refers to the energy of the sample cross-sectional area searched and broken when the sample is broken or segmented by the impact load. It is a commonly used index to measure the toughness of the material, and its level directly affects the service life of the PP material; The addition of ethylene propylene rubber powder has a great influence on the impact strength of PP materials. Usually when the EPDM rubber powder is mixed in a small amount in the PP material, the impact strength of the PP material slightly rises; the amount of the EPDM rubber powder exceeds 40 parts. The impact strength of PP material increases significantly, so EPDM rubber is an ideal material to improve the toughness of PP materials.
Change in the amount of EPDM powder will also affect the flowability and thermal stability of the PP material. Excessive use of the EPDM powder will cause poor flow properties of the PP material, which will affect its processing performance. The amount of EPDM rubber powder will increase. The thermal stability of PP materials has improved significantly. In practical applications, when the amount of EPDM rubber powder is 15-20 parts, the compatibility with the PP material is the best, and the tensile strength, toughness, bending strength, thermal stability, etc. of the PP material can be improved, and the PP product is produced. Manufacturers should not blindly increase the amount of EPDM rubber powder.