East China University of Science and Technology "produced" fire retardant new materials

At present, the technological innovation in the field of materials is changing with each passing day. Superconducting materials, carbon fiber , ceramic-based and resin-based composite materials have made the public unstoppable. The “materials” are developing in the direction of intelligence , micro-nano and design. Prof. Li Chunzhong from East China University of Science and Technology has been studying in the field of polymer composites for many years. Through the complementary advantages of various materials, he has developed a variety of “modified polymer composite materials”. These “modified” materials have both dielectric properties. Or environmentally-friendly polyvinyl chloride with functional properties such as flame retardant, and composite materials such as polypropylene, polyamide, and polybutylene terephthalate with excellent mechanical properties. In the future, elevators, wireless base stations, and automobiles will use this kind of material. Polymer composites.

Li Chunzhong introduced that, for example, the elevator balance compensation chain is an important safety component to keep the elevator running smoothly, usually wrapped in PVC. However, the existing materials in the country contain some substances banned by EU regulations. Once the combustion process is high in smoke density, it is easy to produce toxic gases. The high oxygen index and low smoke density halogen-free flame retardant polymer developed by the project team meet the requirements of EU regulations, and its flame retardant and mechanical properties even exceed the famous products of Germany and the United States.

For example, the base station used in wireless communication requires the protection of the radome from ultraviolet rays, wind and rain, and temperature. The materials developed by the project team can withstand temperatures of 80 degrees Celsius, and are highly resistant to ultraviolet rays, aging, and wind. They are suitable for long-term outdoor use and are environmentally friendly materials that can be recycled.

To improve the properties (toughness, rigidity, strength, etc.) and function (flame retardancy, cold resistance, high temperature resistance, resilience, sealing, etc.) of polymer composites, it is necessary to add different substances to the polymer. What to add? How to add? How to make the distribution of these substances in the polymer, the wear and tear between the materials, etc., develop in the direction of the project team design? After more than ten years of hard work, the project team finally found the “secret side”: interface capacity increase, multi-phase synergy, molding equipment structure design and process optimization, a total of three breakthrough points, and finally invented a series of high performance and specific functions of inorganic Modified polymer materials and articles.

Li Chunzhong said that the future competition is material competition. Hong Kong-Zhuhai-Macao Bridge, Guizhou "Tianyan" large-caliber radio telescope... Building these "super projects", advanced materials have contributed. Enterprises with powerful and advanced materials can easily win in the market competition. According to reports, the Huali team's "modified" materials also include a polyamide material, which has high rigidity and long-term heat resistance, meeting the requirements of high rigidity, heat resistance and wear resistance of the starter gear. Can replace metal gears. This is a big plus for car lightweighting, and it can also save energy. Another PBT/PET/hybrid reinforcement composite material has excellent heat resistance and mechanical properties, and some indexes have surpassed similar foreign products, and have been applied in medium and high-grade domestic cars.

“Composite is one of the inevitable trends in the development of materials. Polymer-based composites are currently the most widely used varieties.” Li Chunzhong said that they will make unremitting efforts in the development of new materials , develop new functional characteristics, and satisfy people's production and life. Demand.