What is the phenomenon of burning benzene instead?

Change to benzene; Polyphenylene oxide (ppe) and polyphenylene oxide (ppo) both refer to the same polymer, because it is an oxide and an ether compound, which is called polyoxyxylene in Chinese. In 1960s, American G.E. Company first invented the synthesis of ppe at room temperature by using 2,6-xylenol in the presence of copper bromide and diamine catalyst, using the mixture of toluene and methanol as solvent, and introducing oxygen. The reaction formula is as follows. 2,6-xylenol is a monomer obtained by the reaction of phenol and methanol, and its process has also been successfully developed by General Electric Company. ..

The prepolymer with molecular weight is oxidized in air at high temperature after polymerization to produce a certain degree of bridging reaction to improve its molecular weight, so the product at that time is called "bridged pps". Summarize with the pps manufacturing patent of Phillips Oil Company-1. However, pps must be modified with fiber or filler to overcome its inherent brittleness. Because of its low viscosity, pps is still easy to form after adding a high proportion of fiber or filler. The modified polyphenylene sulfide not only has many physical properties, but also can be adjusted.

& lt/FONT & gt； & lt/TD & gt； & lt/TR & gt； & lt/TABLE & gt； & lt/TD & gt； & lt/TR & gt； 1. The lowest specific gravity can save material cost. & lt/FONT & gt； 2. The water absorption is the smallest, and it maintains good dimensional stability in humid environment. & lt/FONT & gt； 3. It also has flame retardant effect without adding flame retardant. & lt/FONT & gt； 4. It is well mixed with impact-resistant ps(hips) and shows excellent impact resistance. & lt/FONT & gt； 5. It can be mixed with pp, pa, pps and other plastics. & lt/FONT & gt；

Classification name of Ppe polypropylene: ppe (polypropylene) Typical application scope: household goods (dishwasher, washing machine, etc. ), controller shell, optical fiber connector and other electrical equipment. Process conditions of injection mold: drying treatment: it is recommended to apply handle gate and fan gate before processing. Chemical and physical characteristics: Generally speaking, the ppe or ppo materials provided by the business are generally mixed with other thermoplastic materials such as ps and pa. These mixed materials are still commonly called ppe or ppo. Mixed ppe or ppo ABS plastic; Acrylonitrile butadiene styrene. ABS is opaque ivory particles, and its products can be colored with high gloss. The relative density of ABS is about 1.05, and its water absorption is low. ABS has good adhesion to other materials and is easy to print, coat and electroplate on the surface. The oxygen index of ABS is 18 ~ 20. ABS is a flammable polymer with yellow flame, black smoke and special cinnamon smell. The thermal deformation temperature of ABS is 93~ 1 18℃, and the product can be increased by about 10℃ after annealing. ABS still shows some toughness at -40℃ and can be used in the temperature range of -40~ 100℃. ABS is not affected by water, inorganic salts, alkali and various acids, but can be dissolved in ketones, aldehydes and chlorinated hydrocarbons, and will produce stress cracking when corroded by glacial acetic acid and vegetable oil. ABS has poor weather resistance and is easy to degrade under the action of ultraviolet rays. After being outdoors for half a year, the impact strength decreased by half.