At present, the scientific and technological innovation in the field of materials is changing with each passing day, superconducting materials, carbon fiber and ceramic bases, resin-based composite materials, etc., allow the public to be overwhelmed, and the 'materials' are becoming intelligent, micro-nano, and can be designed in the direction of development. East China University of Science and Technology Li Chunzhong The professor team has been researching in the field of polymer composites for many years. Through the complementary advantages of various materials, a number of 'modified polymer composites' have been developed. These 'modified' materials have either dielectric or flame-retardant properties. The functional properties of the environmentally friendly polyvinyl chloride are also polypropylene, polyamide, polybutylene terephthalate and other composites with excellent mechanical properties. In the future, elevators, wireless base stations, and automobiles will use such polymer composites. .
Li Chunzhong introduced that, for example, the elevator balance compensation chain is an important safety component that keeps the elevator running smoothly. It is usually wrapped in PVC. However, existing materials in China contain substances that are banned by some European Union regulations. Once the combustion process has high smoke density, it is easy to produce. Toxic gases. The project team developed a high oxygen index, low smoke density halogen-free flame-retardant polymer. The elastomer meets the requirements of EU regulations. Its flame retardant and mechanical properties even surpass those of Germany and the United States.
Another example is the base station used in wireless communication. Its RF antenna needs a radome protection against UV, wind and rain, and temperature effects. The materials developed by the project team can withstand temperatures of 80 degrees Celsius, resist UV light, resist aging, and resist wind. Suitable for long-term outdoor use, and is also environmentally friendly material that can be recycled.
To improve the properties (toughness, rigidity, strength, etc.) and functions (flame retardance, cold resistance, high temperature resistance, resilience, sealing, etc.) of polymer composites, it is necessary to add different substances to the polymer. What is added? How to increase the distribution of these substances in the polymer, and the wear and tear between the materials, etc., toward the design of the project team? After more than ten years of hard work, the project team has finally found the 'secret formula': interface expansion, multiphase Collaboration, molding equipment structure design and process optimization, a total of three breakthrough points, and finally invented a series of inorganic modified polymer materials and products with high performance and specific functions.
Li Chunzhong stated that the future competition is the competition of materials. The Hong Kong-Zhuhai-Macao Bridge, Guizhou 'Tianyan' large-caliber radio telescope...... These 'super projects' were built in the construction of advanced materials, and enterprises have mastered powerful advanced materials. Can easily win in the market competition. According to reports, Huali team's 'modified' material, also includes a polyamide material, it has a high degree of rigidity and long-term heat resistance, to meet the starter gear high rigidity, The heat and wear resistance requirements can replace metal gears. This is a great advantage for the weight reduction of cars, and it can also save energy. Another PBT/PET/hybrid reinforcement composite material has excellent heat resistance. Sexual and mechanical properties, some of the indicators have exceeded the foreign similar products, have been applied in high-end domestic cars.
'Combination is one of the inevitable trends in the development of materials. Polymer-based composites are the most widely used species at the moment. ' Li Chunzhong said that they will make unremitting efforts in the development of new materials, and develop new features to meet people's production and life. The demand.