Ammonium Polyphosphate with Crystal Form V by DAP+P2O5
Ammonium polyphosphate (APP) is a widely used intumescent flame retardant ingredient, it has six crystalline forms, APP-V is seldom studied in literature. In this study, APP-V was prepared by process of diammonium phosphate (DAP)+P2O5 as raw material, and melamine as condensation agent under dry ammonia. Its properties such as water solubility was tested and compared with APP-II. Further characteristics techniques such as FTIR, XRD, and TGA were used to characterize this product.
Shiquan Liu and Min Zuo
G. X. Zhao and G. S. Liu, "Ammonium Polyphosphate with Crystal Form V by DAP+P2O5", Advanced Materials Research, Vols. 306-307, pp. 713-716, 2011