MPP无卤阻燃聚丙烯纤维的辐照改性研究  

Irradiation modification of halogen-free MPP flame retardant polypropylene fibers

作　　者：曹文玥[1] 贾二鹏[1] 喻慈航[1] 徐建军[1] 叶光斗[1] 姜猛进[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料与工程国家重点实验室,四川成都610065

出　　处：《合成纤维工业》2013年第1期6-9,共4页China Synthetic Fiber Industry

基　　金：广东教育部产学研项目(2010B090400386)

摘　　要：采用自制季戊四醇螺环磷酸酯双蜜胺盐(MPP)无卤阻燃剂与聚丙烯(PP)进行共混纺丝,制备了无卤阻燃PP纤维,采用低能电子辐照对无卤阻燃PP纤维进行改性,并对MPP的结构、PP纤维的力学性能及阻燃性能进行了表征。结果表明:自制MPP为预期结构;随着MPP含量的增加,PP纤维的极限氧指数(LOI)增大,但其断裂强度有所下降;MPP质量分数为8%时,纤维断裂强度为6.02 cN/dtex,LOI为24.5%;随低能电子辐照量的增大,MPP质量分数8%的阻燃PP纤维的LOI大幅度增加;当电子辐照量为200 kGy时,阻燃PP纤维的LOI为33.8%,断裂强度为3.08 cN/dtex,起始分解温度和残炭率比纯PP纤维均有较大幅度增加,燃烧形成连续致密的炭层。A halogen-free flame retardant polypropylene （PP） fiber was prepared from a self-made halogen-free flame retard- ant, i.e. melamine salt of pentaerythritol spirocyclic phosphate （MPP）, and PP by blend spinning process. The halogen-free re- tardant PP fiber was modified by low-energy electron irradiation. The structure of MPP and the mechanical properties and flame retardanee of the fiber were characterized. The results showed that the self-made MPP had the structure just as designed; the lim- it oxygen index （ LOI ） of PP fiber rose, but the breaking strength dropped while increasing the MPP content; the breaking strength of the fiber was 6.02 cN/dtex and the LOI was 24.5% as the mass fraction of MPP was rationally controlled as 8% ; the LOI of the flame-retardant PP fiber containing 8% MPP by mass fraction increased with the increase of low-energy electron irradiation dosage; the LOI of the flame retardant PP fiber was 33.8% and the breaking strength was 3.08 cN/dtex when the electron irradiation dosage was 200 kGy; and the initial decomposition temperature and char residue were greatly increased as compared with those of pure PP fiber, and the continuous and compact structure of char residue formed after combustion.

关 键 词：聚丙烯纤维 阻燃纤维 季戊四醇螺环磷酸酯双蜜胺盐 无卤阻燃 电子辐照 

分 类 号：TQ342.62[化学工程—化纤工业]