环状氯化磷腈微胶囊化的原位聚合

Microencapsulating Chlorocyclophosphazene by In-situ Polymerization Process

以三聚氰胺、尿素和甲醛为原料,采用原位聚合法,制备了囊心为环状氯化磷腈、囊壁为三聚氰胺尿素甲醛树脂的微胶囊阻燃剂。热重分析表明:微胶囊阻燃剂的起始热分解温度由纯环状氯化磷腈的180 ℃提高到300 ℃。将微胶囊阻燃剂应用于聚丙烯中,可使材料的阻燃性达UL 94 V 0级,且PP/环状氯化磷腈微胶囊阻燃剂材料的各项力学性能,特别是拉伸强度均优于PP/纯环状氯化磷腈材料。

Melamine-urea-formaldehyde-chlorocyclophosphazene microcapsule flame retardant was made by in-situ polymerization process using melamine, urea and formaldehyde as raw materials. The thermo-gravimetric measurements show that the initial thermal decomposition temperature of chlorocyclophosphazene microencapsule increases from 180 ℃ for the pure chlorocyclophosphazene to 300 ℃ . The polypropylene(PP)/chlorocyclophosphazene microencapsule could reach the flame retardant level of UL-94 V-0, and the mechanical properties of PP/ chlorocyclophosphazene microencapsule,especially the tensile strength are superior to PP/chlorocyclophosphazene.