1, plastic, glass is polymer. Its composition is polymethyl methacrylate.

2, the definition of plastic (the American association of plastics industry, mainly composed of carbon, oxygen, hydrogen and nitrogen, and other organic or inorganic elements, the finished product is solid, is in the process of manufacturing the molten liquid, so it can record heat melting, add pressure to the flow, cooling solidification, and form various shapes, the vast and varied ethnic group called plastic material.

3, poly (methyl methacrylate, acrylic acid and its ester kind of polymerization of polymers generally referred to as the acrylic resin, and the corresponding plastic collectively polyacrylic plastics, of which the most widely used polymethylmethacrylate. Abbreviation for PMMA polymethylmethacrylate, commonly known as organic glass, is so far in the synthesis of transparent material quality of a material is the most excellent, price and suitable varieties. Applications: PMMA soluble in organic solvents, such as phenol, phenyl methyl ether, etc., by spin coating can form a good film, has good dielectric properties, can be used as a field-effect tube (OFET) also called organic thin-film transistor (OTFT) of the dielectric layer. PMMA resin is avirulent environmental protection material, and can be used in the production of tableware, sanitary ware, etc., has a good chemical stability, and weather resistance.