PVC-木粉復合材料膠接性能的研究.pdf

1、東北林業(yè)大學碩士學位論文PVC木粉復合材料膠接性能的研究姓名：李影申請學位級別：碩士專業(yè)：木材科學與技術指導教師：程瑞香；王清文201006東北林業(yè)人學碩士學何論文AbstractThethesisdescribedbondingpropertiesofgluedblocksofPVCwoodplasticcomposites(WPC)withepoxyresinadhesiveandJ39acrylicadhesiveTheresul

2、tsshowedthatcompressingshearstrengthofgluedblockswithepoxyresinadhesiveWaSthebest，drycompressingshearstrengthofgluedblockswithJ39acrylicadhesiveWasthesecondTocomparedwithWPCmaterialsitselfcompressingshearstrengthsofglued

3、blocks、Ⅳi血epoxyadhesivesandJ39acrylicadhesiveCanreachthematerialitself72％and57％ThebondingeffectoftWOkindsofadhesivewasobviousforPVCWPC；Increascingcuringtimealsohadaffectontheshearstrengthofepoxyresinadhesive黜thespicemans

4、liedinroomforlong，thevaluewasmorethanupto807MPaCuringtimehadasignificanteffectonthebondingstrengthofgluedblockswithepoxyresinAftersurfacetreatmentwithacetone，compressingshearstrengthsofgluedblockswithJ一39acrylicadhesiveW

5、asincreasedgreatlyCompressingshearstrengthofthegluedspecimen塒thJ39acrylicadhesiveincreasedfrom597MPaupt0714MPacompressingshearstrengthincreased196％Asfortheepoxyadhesive，therewaslittledifferencebeforeandafteracetonesurfac

6、etreatmentAgingtestincludingboiledagingandUVagingwerealsotestedThroughcomparingthecompressingshearstrengthbeforeandafteragingtestitisfoundthattheagingpropertiesofepoxyresinadhesiveWasbetterthanJ39AcrylicadhesiveObservedb

7、ondinginterfaceofepoxyresinadhesiveaftertheagingbySEM，itwasfoundthatadhesivelayerwerechangedbutcombinationdegreebetweentheepoxyadhesiveandPVCWPCWasunchangedSurfacefreeenergyofPVCWPCwas403mN／mcalculatedbythecontactangleme

8、thodsanditWaslowerthanthewoodThisWaswhythatPVCWPCWasdimculttoadhesiveThepenetrationofdifferentadhesiveintoPVCWPCWasstudiedbySEMByobservingthebondinginterface，itcouldfoundthatadhesivepenetrateintotheholesandpores，andthisc

9、ouldformstrongmechanicalinterlockingwhichincreasedbondingstrengthofbondingjointsWecouldseebySEMthatthecombinationbetWeeninterfaceWashilgIlclose，thereWasnogapbetweentheinterface，adhesivesandmaterialsisverygoodfusionThebon

10、dinginterfaceofgluedblocksofPVCWPCWasstudiedbyFTIRItWaSfoundthatepoxyadhesiveformedtheC=0stretchingvibration，estergroupWaSformedafterthecuringreactionC=0stretchingvibrationpeal(whichWascausedbyesterificationofacryliceste