简介：Throughinterfacialpoly-condensationofR2SnCl2(R=Me,Bu)withvariousdiacids,diphenols(diols),diamines,amino-acids,hydroxyacids,urea,orthiourea,aseriesoforgano-tinpoly-esters,poly-ethers,poly-amines,poly-amine-esters,poly-ureas,poly-thioureaswereprepared,andcharacterisedaltogethertotalling100polymers,amongwhich91arepreviouslyunreported.ThesynthesizedpolymershaveapotentialasathermostabilizerinPVCproducts.

简介：Bis(β-alkoxycarbonylalkyl)tindichlorideswereinterfacialcondensedwithorganicdithio-alcoholstogiveaseriesofneworgano-tinpolymers.Experimentalparameterswerediscussed.Thepolymerssynthesizedweretestedfortheireffectontheheat-stabilizationofPVCresins.Theresultsareofinterestinthisareaofapplication.

简介：SereralPd-SnO2/D3520andPd-PbO/D3520catalystswithPd/D3520,SnO2/D3520andPbO/D3520catalystsasreferencewerestudiedbymeansofIRandXPS.InteractionbetweenPdandthesecondmetalorbetweenmetalandsupportwasobserved.ResultsshowthatthereisastronginteractionbetweenPdandthesecondmetal,butthereisnotanobviousinteractionbetweenmetalandsupport.TheactiveconstituentisPd.HydrogenationactivityofthecatalystsisalteredbecauseoftheinteractionbetweenPdandthesecondmetal.TheactivityofthecatalysisforhydrogenationhasrelationtoouterlayervalenceelectrondensityofPd.