Introduction to the development history of plexiglass at home and abroad. Plexiglass was first produced in 193 1 year by Rohm & Haas, Germany, replacing cellophane plastics. It has been used in aircraft industry as cockpit cover and windshield. In 1950s, Rohm &; Haas company developed plasticized and unplasticized plexiglass, then developed slightly crosslinked plexiglass with network structure, and took the lead in successfully developing oriented plexiglass for manufacturing aircraft windshield and cockpit cover. In 1960s, the former Soviet Union developed a new type of oriented plexiglass through polymerization and stretching. At present, in addition to the United States and Russia, Germany's Rohm Company, Britain's ICI Company, Aerostt"turesHamble Company and LucasAerosPace Company, France's sullyProductsSpecianx Company and Japan's Mitsubishi Rayon Company (MRc) also produce oriented and oriented stretch crosslinked plexiglass.
Introduction to the development history of plexiglass at home and abroad. In China, the research on the synthesis and polymerization of methyl methacrylate (MMA) monomer was started by Institute of Chemistry, Chinese Academy of Sciences on 1953. 1955, Jinxi Institute of Chemical Technology completed the industrial scale-up test of MMA monomer synthesis and casting polymerization in Shenyang Chemical Comprehensive Laboratory, and began to develop oriented plexiglass in 19. 1985 imported the grinding and polishing machine from Sie~in company in the United States, which basically solved the long-standing apparent quality problems of oriented plexiglass such as hot spot resistance and optical distortion. The main performance of plexiglass is shown in Table 2. 1, among which the most outstanding is its excellent optical performance, which is not only superior to other transparent plastics (such as PS and PC), but also higher than ordinary glass by more than 10%, with a wide transmission range (transmission wavelength of 287-2600lun), and can transmit most ultraviolet rays and even some infrared rays.