DOPS衍生物阻燃剂的合成及聚乳酸复合材料的性能  

Synthesis of flame retardant based on DOPS derivatives and properties of polylactic acid composites

作　　者：王建航 许志彦 叶小林[1] 侯泽明 龙丽娟[2] 宝冬梅[1] WANG Jianhang;XU Zhiyan;YE Xiaolin;HOU Zeming;LONG Lijuan;BAO Dongmei(School of Chemical Engineering,Guizhou Minzu University,Guiyang 550025,Guizhou,China;National Engineering Research Center for Compounding and Modification of Polymer Materials,Guiyang 550014,Guizhou,China)

机构地区：[1]贵州民族大学化学工程学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《精细化工》2022年第2期396-402,共7页Fine Chemicals

基　　金：国家自然科学基金项目(51863004);贵州省科技计划项目(黔科合基础[2020]1Y211);贵州省科技计划项目(黔科合基础-ZK[2021]一般248);贵州省2018年度高层次创新型人才培养-千层次人才项目。

摘　　要：以马来酸酐(MAH)和9,10-二氢-9-氧杂-10-磷杂菲-10-硫化物(DOPS)为原料,合成了马来酸酐-9,10-二氢-9-氧杂-10-磷杂菲-10-硫化物(MAH-DOPS),将MAH-DOPS应用于聚乳酸(PLA)的阻燃改性。采用TG、极限氧指数(LOI)、垂直燃烧(UL-94)、锥形量热、TG-FTIR和SEM-EDS测试了MAH-DOPS对PLA的热稳定性、阻燃性能和热降解行为的影响。结果表明,阻燃剂MAH-DOPS中的P、S元素产生的协同阻燃作用提高了阻燃效率,改善了PLA的阻燃性能。当阻燃剂质量分数为5%时,制备的PLA/MAH-DOPS-5%的LOI为28.1%,达到UL-94 V-0级,总热释放量和平均有效燃烧热降低。MAH-DOPS同时在气相和凝聚相发挥阻燃作用,并以气相阻燃机理为主。Maleic anhydride-9,10-dihydro-9-oxa-10-phosphophene-10-sulfide(MAH-DOPS)was synthesized from maleic anhydride(MAH)and 9,10-dihydro-9-oxa-10-phosphophene-10-sulfide(DOPS)and used to modify polylactic acid(PLA).The effects of MAH-DOPS on the thermal stabilitiy,flame-retardant and thermal degradation behaviour of PLA were investigated by TG,limit oxygen index(LOI)test,vertical flame test(UL-94),cone calorimeter,thermogravimetric-Fourier transform infrared spectroscopy analysis(TG-FTIR)and SEM-EDS.The results showed that the synergistic flame retarding effect of P and S elements in MAH-DOPS improved the flame retarding efficiency and flame retarding performance of PLA.When the mass fraction of flame retardant was 5%,the LOI of prepared PLA/MAH-DOPS-5%was 28.1%,the vertical combustion grade reached UL-94 V-0,both total heat release and average effective heat of combustion decreased.MAH-DOPS played a flame retardant role in both gas phase and condensed phase,and the flame retardant mechanism was mainly in the gas phase.

关 键 词：MAH-DOPS 聚乳酸 合成 阻燃机理 橡塑助剂 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ317[化学工程—高聚物工业]