What role does rare earth play in plastics? What is the main role?

At present, rare earths are mainly used as rare earth non-toxic heat stabilizers, rare earth modifiers, rare earth photoluminescent agents, rare earth magnetic agents, etc. in plastics.

In 2004, China’s outstanding application in this respect has the following aspects:

1. Hengshui Jingxin Chemical Group Co., Ltd. has successfully developed a new high-efficiency PVC rare earth composite stabilizer widely used in the production of PVC door and window profiles and pipes. The product has the characteristics of good plasticizing performance, high product smoothness and excellent dispersibility. In particular, it has carried out technological innovation and research on the application of rare earth elements in composite materials, which has shown superior performance in thermal stability system, internal and external lubrication system, modified toughening system, etc., and greatly improved the physical properties and mechanics of the products. Performance, welding performance, high temperature thermal stability of the product is also improved, while its anti-aging function, anti-static function has also improved, and the finish is more durable.

2. The “New Polypropylene Composite Modification Auxiliary and Materials” project jointly completed by Guangzhou Chemical Co., Ltd. and Guangzhou Blonde Technology Co., Ltd. used organic acids and derivatives to react with light rare earth and calcium-containing compounds to prepare new types. A polypropylene beta nucleating agent and an inorganic particle surface treatment agent for polypropylene filling. When the former is modified with polypropylene, the heat distortion temperature and impact strength of the polypropylene can be remarkably improved, and the tensile strength of the material is substantially maintained. When the calcium carbonate or the like treated by the latter is filled with polypropylene, the processing activity can be improved, the addition amount of the filler can be improved, the cost of the material can be reduced, the toughness of the material can be improved, and the tensile strength of the material can be not lowered. Both additives are non-toxic, odorless, colorless, etc., and their modification can expand the application range of polypropylene. The polypropylene material prepared by the nucleating agent synthesized by the project has been used by many users and has good reflection and good social and economic benefits.

3. Shanghai Normal University uses nanotechnology to extract energy from sunlight, and adds plastic film of rare earth nano multi-band light-transfer powder, which can convert solar ultraviolet light and part of yellow-green light into red light and blue light. These two kinds of light are plant photosynthesis. Essentially, red light allows plants to produce results, and blue light allows plants to grow stems and leaves. Covering such a light-transfer film is like applying 20% ​​of the pollution-free “light fertilizer” to crops. The yield of vegetables and flowers such as cucumber and watermelon can not only increase by 8% to 15%, but also the quality of crops. Vitamins and sugars. The content of starch and starch can be improved by 0.5% to 1%. At present, this light-transfer film has been used in more than 3,800 acres of farmland in Shanghai and Jiangsu.

4. Ningxia Hui Autonomous Region has successfully developed a rare earth multi-functional liquid film that can completely degrade and effectively solve the agricultural “white pollution”. After spraying the soil, the film forms a layer of black-colored rare earth polymer protective film on the surface, which can accept natural rainfall. After 30-50 days, it will naturally degrade into organic fertilizer after light and microbial action, which not only avoids “white pollution”. ", also increased fertility to the land. At the same time, it has the function of warming, moisturizing and protecting seedlings of plastic mulch. The use of farmland is also reduced by 30% compared with plastic mulch. At the same time, because of its strong adhesion ability, he will play an important role in preventing land desertification, artificial planting of desert plants, returning farmland to grassland, and preventing land desertification and sandstorms.