2023年9月第60卷第5期四川大学学报(自然科学版)JournalofSichuanUniversity(NaturalScienceEdition)Sep.2023Vol.60No.5聚磷酸铵改性乙烯基酯树脂的阻燃性能与阻燃机理研究林雨欣,付腾,郭德明,王玉忠(四川大学化学学院环保型高分子材料国家地方联合工程实验室,成都610065)摘要:乙烯基酯树脂(VER)因其具有良好耐腐蚀性能和优异的物理性能被广泛应用于诸多领域,然而由于VER极易燃,限制了其使用范围。为了提高VER的阻燃性,本文将聚磷酸铵(APP)作为阻燃剂引入VER中,制备得到阻燃乙烯基酯树脂固化物;采用热重分析仪(TGA)表征了VER的热稳定性;扫描电子显微镜(SEM、SEM-EDX)研究了VER燃烧后残炭的微观形貌,表面元素组成及分布;利用极限氧指数(LOI)、垂直燃烧测试(UL-94)、锥形量热((CCT)对其阻燃性能进行测试;采用热重红外光谱联用仪(TG-FTIR)等手段分析APP在VER中的阻燃机理研究结果表明,当APP的引入量为30Wt%时,乙烯基酯树脂的极限氧指数达到30.3%,通过UL-94V-0级别.APP在凝聚相和气相中共同发挥阻燃作用.关键词:聚磷酸铵;乙烯基酯树脂;阻燃中图分类号:TQ325ResearchontheflameretardantperformanceandmechanismofvinylesterresinmodifiedbyammoniumpolyphosphateLINYu-Xin,FUTeng,GUODe-Ming,WANGYu-Zhong(Materials(MoE),NationalEngineeringLaboratoryofEco-FriendlyPolymericMaterials(Sichuan),StateKeyLaboratoryofPolymerMaterialsEngineering,CollegeofChemistry,SichuanUniversity,Chengdu610065,China)Abstract:Vinylesterresin(VER)isawidelyusedmaterialduetoitsgoodcorrosionresistanceandex-cellentphysicalproperties.However,itsextremeflammabilitylimitsitsuseinmanyfields.ToimprovetheflameretardancyofVER,theauthorsofthispaperintroduceammoniumpolyphosphate(APP)asaflameretardant,andprepareflameretardantcuredvinylesterresin.Thefollowingmethodsareusedtotesttheflameretardantpropertiesofthepreparedcompounds:thermogravimetricanalyzer(TGA)tocharacterizethermalstability;scanningelectronmicroscope(SEM,SEM-EDX)toinvestigatethemicro-scopicmorphology,compositionanddistributionofsurfaceelementsofresidualcarbonafterburningofVER;limitingoxygenindex(LOI),verticalburningtest(UL-94),andconecalorimetry(CCT)totesttheflameretardantproperties;thermogravimetricinfrared...