As a hot engineering plastic with strong comprehensive properties in recent years, POM board is widely used in the construction industry and manufacturing industry. Some people even think that POM board can replace metal materials such as steel, zinc, copper and aluminum. Since POM board is a thermoplastic engineering plastic with high melting point and high crystallinity, it needs to be modified and upgraded when it is used in different application scenarios.
POM material has the characteristics of high hardness, wear resistance, moisture resistance, chemical resistance, etc. It has strong fuel resistance, fatigue resistance, high impact strength, high toughness, high creep resistance, good dimensional stability, self-lubricating, It has a high degree of design freedom and can be used for a long time at -40 to 100 °C. However, due to the high relative density, the notched impact strength is low, the heat resistance is poor, it is not suitable for flame retardant, it is not suitable for printing, and the molding shrinkage rate is large, so POM modification is an inevitable choice. POM is very easy to crystallize during the forming process and generate larger spherulites. When the material is impacted, these larger spherulites are prone to form stress concentration points and cause material damage.
POM has high notch sensitivity, low notch impact strength, and high molding shrinkage rate. The product is prone to internal stress and is difficult to form tightly. This greatly limits the application range of POM and cannot meet industrial requirements in some aspects. Therefore, in order to better adapt to harsh working environments such as high speed, high pressure, high temperature, and high load, and further expand the application scope of POM, it is necessary to further improve The impact toughness, heat resistance and friction resistance of POM.
The key to the modification of POM is the compatibility between the phases of the composite system, and the development and research of multifunctional compatibilizers should be increased. The newly developed gel system and in-situ polymerized ionomer toughening make the composite system form a stable interpenetrating network, which is a new research direction to solve the interphase compatibility. The key to chemical modification lies in the introduction of multifunctional groups into the molecular chain by selecting comonomers during the synthesis process to provide conditions for further modification; adjusting the number of comonomers, optimizing the design of molecular structure, and synthesizing serialization and functionalization and high-performance POM.
original source: https://www.bydplastics.com/news/industry-prospect-of-anti-static-pom-sheet/
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