·1·ChemicalPropellants&PolymericMaterials··ChemicalPropellants&PolymericMaterials·2···3·ChemicalPropellants&PolymericMaterials·4···5·ResearchProgressinModificationofBismaleimideResininChinaANQun-li1,QIShu-hua1,ZHOUWen-ying1,SHIXiang2(1.DepartmentofAppliedChemistry,SchoolofScience,NorthwesternPolytechnicalUniversity,Xi'an710072,China;2.DepartmentofMeterialScienceandEngineering,Xi'anUniversityofScienceandTechnology,Xi'an710054,China)DevelopmentSurveyofAqueousPolyurethaneAdhesivesWENGHan-yuan(ChinaPolyurethaneIndustryAssociation,LimingResearchInstituteofChemicalIndustry,Luoyang471000,China)ChemicalPropellants&PolymericMaterials·16·