【摘要】 利用共沉淀法合成了次磷酸铝(AHP)和羟基锡酸锌(ZHS),将ZHS在300℃条件下用马弗炉煅烧3 h得到无定形的锡酸锌(ZS)。将AHP和ZS协同阻燃聚对苯二甲酸丁二醇酯(PBT),并通过极限氧指数、垂直燃烧测试(UL 94)和微型量热等分析了体系的阻燃性。结果表明,当ZS的含量为1.4%(质量分数,下同)时,综合极限氧指数和UL 94测试结果,其阻燃效果最好,极限氧指数从纯PBT的21.8%上升到24.1%,UL 94等级从纯PBT的滴落严重提高到V-0级,说明AHP与ZS在合适的比例下能显著提高PBT的抗滴落性;当ZS的含量为1.4%时,样品的热释放速率从纯PBT的561.40W/g下降到538.57 W/g。更多还原

【Abstract】 Aluminum hypophosphite(AHP) and Zinc hydro xystannat(ZHS) were synthesized through homogeneous precipitation method.And then ZHS was calcined in a muffle furnace at 300 ℃for 3 h forming amorphous zinc stannate(ZS).AHP and ZS were used as a flame retardant for poly(1,4-butylene terephthalate)(PBT).When the content of ZS was 1.4%,limiting oxygen index increased from 21.8%for neat PBT to 24.1%,and UL 94 rating reached V-0.In addition,the heat release rate was decreased to 538.57 W/g from 561.40 W/g for neat PBT.更多还原