We're going to talk about hydroxypropyl methyl cellulose
Hydroxypropyl methylcellulose is a synthetic polymer made of natural cellulose by chemical modification. Hydroxypropyl methylcellulose is a natural cellulose derivative; hydroxypropyl methylcellulose production and synthetic polymer are different; its primary material is cellulose, a natural polymer compound. Because of the unique structure of natural cellulose, cellulose cannot react with an etherifying agent. But after the treatment of the swelling agent, the strong hydrogen bond between and w