简介：Fivefluorine-containingvinylethermonomerswerepreparedbythereactionbetween2-vinyloxyethanol,afluorinatedalcoholandhexafluorobenzeneinthepresenceofsodiumhydrideindimethylformamide.Tworepresentativepropertiesofthesemonomers,UV-curingbehaviorinitiatedbyacationicphoto-initiatorPAG201andsurfacefreeenergyofcoatingfilms,wereinvestigated.Photo-polymerizationproceededbothrapidlyandcompletelywithahighdouble-bondconversion(>90%)andafastcuringrate(maximumcuringtime<21s)forthreemonomers.Thesurfaceenergiesofthemonomersandtheresultingpolymerfilmsweretheninvestigated.TheminimumsurfacefreeenergyoftheUV-curedhomopolymerfilmsreaches7.1mJ/m2.X-rayphotoelectronspectroscopydatashowthatthelowsurfacetensionisinfluencedbyfluorinecontentinthesoftsegmentsandfluorinatedchains'migrationtothesurface.Thefivemonomersexhibitlowviscosity,lowsurfaceenergy,goodthermalstabilityandgoodphoto-polymerizationproperties,whichmakethemgreatcandidatesforUVcoatingandphotoresistapplications.

简介：TheeffectsofmagneticfieldonthegraftratioandstereoregularityofgraftsofPVA-g-MMAinthepresenceofbenzophenoneduringUVirradiationarediscussed.BymeansofIR,itwasfoundthatthegraftratiowasincreasedwiththeincrementofmagneticfieldstrength.Furthermore,applicationofrelativeweakmagneticfieldof0.4Teslahadbeenshowntosubstantiallyenhancethestereo-regularityofgraftcopolymer.Themaximumstereo-regularityappearedwhenthegraftratioapproachedto85%withthemagneticfieldof1.2Tesla(T).Theresistancetomoistureandheatresistanceofthegraftedcopolymerinthepresenceofmagneticfieldwerealsoimproved.