and the leading pattern is gradually emerging.

polyvinylpyrrolidone (pvp) is a nonionic polymer compound produced by polymerizing n-vinylpyrrolidone (nvp) under certain conditions. pvp has the advantages of excellent solubility, chemical stability, low toxicity, and film-forming properties. it has a high demand for applications as an auxiliary, additive, and auxiliary material. it is a widely used fine chemical product in medicine, textiles, chemicals,…