第2期PreparationandpropertiesofultravioletcuringsulfurcontainingsealantMINYa-lan1,HOUPing-an1,LIUYi-fan2,ZHANGJian-zheng2(1.VICChengduAircraftIndustrial(Group)CoLtd,Chengdu610061,China;2.AECCBeijingInstitueofAeronauticalMaterials,Beijing100095,China)Abstract:TheThiol-eneclickreactionwasusedtopreparephotoinitiatedradicalcuringsealantsbasedonpolythioetherrubber.Theeffectoftypesandamountofphotoinitiatorsinthecuringsystem,aswellasthetypesofolefinsandpolythiolsontheme-chanicalpropertiesofthesealantaftervulcanization,temperatureofthermaldecomposition,andglasstransitiontemperaturewerestudied.Theresultsshowedthatcomparedwithphotoinitiator184,thecu-ringeffectandthermalstabilityofthecuredsealantwerebetterwhenusingphotoinitiator1173,andthemechanicalpropertiesandthermalstabilityofthesealantdecreasedwithincreasingamountofphotoinitiator.Andtheappropriateamountofpho-toinitiator1173was0.03phr(mass,thesamebe-low).Themechanicalpropertiesofpolythioethersealantcuredwithtripropyleneglycoldiacrylate(TPGDA)ascuringagentwerethebest,andthemechanicalpropertiesandthermalstabilityofthesealantincreasedwithincreasingamountofTPGDA.AndtheappropriateamountofTPGDAwas1.00phr.Theadditionofmultifunctionalmercaptancouldim-provethecrosslinkingdegreeofthesealantandalsomaketheglasstransitiontemperatureincreased.Keywords:liquidpolythioetherrubber;ultravio-letcuring;sulfurcontainingsealant;photoinitiator;curingagent;mechanicalpropertythecuringprocessofpolysulfidesealantbyinsitudielectricanalysis[J].JournalofAppliedPolymerScience,2012,126(5):1725-1732.[6]刘嘉.二氧化锰硫化剂对聚硫密封剂性能的影响[J].中国胶粘剂,2012,21(5):13-16.[7]索军营.环境温湿度条件对聚硫密封胶性能的影响[J].中国胶粘剂,2015,24(4):20-22.[8]HoyleCE,LoweAB,BowmanCN.Thiol-clickchemistry:Amultifacetedtoolboxforsmallmoleculeandpolymersynthesis[J].ChemicalSocietyReviews,2010,39(4):1-34.[9]MatherBD,ViswanathanK,MillerKM,etal.Michaelad-ditionreactionsinmacromoleculardesignforemergingtech-nologies[J].ProgressinPolymerScience,2006,31(5):487-531.闵雅兰等.紫外光固化含硫密封剂的制备及性能国内简讯··2023年1-2月我国合成橡胶进出口概况据合成橡胶工业协会网站3月21日报道,2023年1-2月,我国共进口主要合成橡胶166kt,与2022年同期相比增加1kt,增幅1%。2023年1-2月,我国共出口主要合成橡胶97kt,与2022年同期相比增加52kt,增幅117%。我国共进口合成胶乳29kt,与2022年同期相比减少了10%;进口天然胶乳共75kt,同比增加了1%。我国共进口复合橡胶7kt,与2022年同期相比减少了37%;进口天然橡胶共310kt,同比减少了8%;进口天然橡胶与合成橡胶混合物共736kt,同比增加了28%。99··