Views:3 Author:Site Editor Publish Time: 2019-10-08 Origin:Site
(1)Combustion method. Operation: Cut an 8 cm *2 cm edge material of wire mesh, tie it to chopsticks with wire, ignite the wire mesh with matches, and the wire mesh is ignited. Observation: While melting, it burns slowly, and the nylon net is the globular yellow-brown glass ash, while the black smoke burns while melting, and the polyester net is the hard black ash residue. It is nylon mesh that burns wool and polyester mesh that smells fragrant.
(2) acid dissolution method. Operation: Take a small amount of sulfuric acid or hydrochloric acid, sulfuric acid to prepare 70% solution, hydrochloric acid to prepare 20% solution, wire mesh edge material into the above solution.