ZDP与EPT/ATO协同阻燃PA6的性能  

Properties of PA6 Synergistic Flame Retarded by ZDP Combined with EPT/ATO

作　　者：朱德振[1] 刘可[1] 李圆圆[1] 肖茹[1] 

机构地区：[1]东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海201620

出　　处：《工程塑料应用》2016年第12期8-13,共6页Engineering Plastics Application

基　　金：国家自然科学基金项目(21374015)

摘　　要：以二乙基次膦酸锌(ZDP),N,N′–乙撑双四溴邻苯二甲酰亚胺(EPT)和三氧化二锑(ATO)组成阻燃体系与聚己内酰胺(PA6)经熔融共混制得阻燃PA6。利用热失重、炭层形貌分析、傅立叶变换红外光谱、裂解气相色谱-质谱、差示扫描量热、垂直燃烧和极限氧指数(LOI)测试研究其阻燃及热性能。结果表明,ZDP与EPT/ATO具有协同阻燃作用,当PA6,ZDP,EPT与ATO配比为44∶3∶2∶1时,阻燃PA6的UL 94达到V–0级,LOI为29.4%;与纯PA6相比,结晶温度与热失重残炭率均有所提高,分别为188.8℃和8.7%,熔融温度几乎不变,最大热失重温度约为435.9℃;燃烧产生的次膦酸自由基、溴自由基和EPT残留物可以捕获燃烧区自由基,提高了离火自熄性;燃烧形成的连续致密孔隙状交联炭层具有抗滴落的作用。Zinc Diethylphosphinate （ZDP）,N,N′–ethylene-bis（tetrabromophthalimide） （EPT）,antimony trioxide （ATO） and polycaprolactam （PA6） was blended in twin screw to produce fiame-retardant PA6. Flame-retardant and thermal properties of fiame-retardant PA6 were studied by TG, morphology of char layers,FTIR,Py-GC/MS,DSC, UL 94 and LOI tests. The results show that ZDP with EPT/ATO have synergy fiame-retardant efficiency, and UL 94 and LOI results reach to V–0 and 29.4%, when the ratio of PA6,ZDP,EPT and ATO is 44∶3∶2∶1. Compared with pure PA6,its crystallization temperature and residual char’s mass improved more or less, which were 188.8 ℃ and 8.7%,respectively. The melting temperature is almost unchanged and the maximum thermo-gravimetric temperature is about 435.9℃; During burning, the phosphinate free radical, Brfi and residues of EPT can react with free radical of fire zone, and improving the self-extinguishing-away-fire. After burning, there are continuous compact and porous cross-linked charring layers formed, having anti-dripping effect.

关 键 词：阻燃 聚己内酰胺 二乙基次膦酸锌 N N′–乙撑双四溴邻苯二甲酰亚胺 三氧化二锑 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]