Journal of The Adhesion Society of Japan
Online ISSN : 2187-4816
Print ISSN : 0916-4812
ISSN-L : 0916-4812
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Volume 39, Issue 9
Displaying 1-4 of 4 articles from this issue
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Review
Original Paper
  • FracturedMorphologyofBiodegradableAdhesiveContainingRiceBranandItsBiodegradability
    Toshio OGAWA, Osamu YAMAGA, Satoshi OSAWA
    2003 Volume 39 Issue 9 Pages 342-348
    Published: September 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.342
    JOURNAL FREE ACCESS
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    Thefracturedsurfacewasexaminedfromtheviewpointofinterfacialchemistry,whenthebiodegradableadhesivecontainingricebranwasusedforwood.Whenpoly(lacticacid)wasusedthecohesivefailurewasmainlyobserved.Whenpoly(butylenessuccinateadipate)andpolj(caprolactone)wereused,theinterfacialfailurewasmainlyobserved.However,thestrengthofpolymeritselfwasconsideredtoplayaveryimportantroleintheadhesivestrengthofthisblendsystemfot､wood.Inthelandfilltest,thenumberofmicroorganismsaroundthetestpiecesincreasedconsiderablywithricebrancontent.Atthesametime,themolecularweightsofpolymersdecreasedwiththericebrancontent.Wecanconcludethatthericebrancontributeslargelytothebiodegradalionrateofthesepolymers.
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Original Paper
  • DynamicViscoelasticAnalysisofCuringProcessofUrea-FormaldehydeResinandFormaldehydeEmission
    Kensuke KAWARADA, Takahiko IIDA, Masaharu OHMI, Hiroshi TOMINAGA, kiyo ...
    2003 Volume 39 Issue 9 Pages 334-341
    Published: September 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.334
    JOURNAL FREE ACCESS
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    Inordertoanalyzethecuringprocessofurea-formaldehyde(UF)resin,thedynamicviscoelasticityand'''C-NMRspectraoftheUFresinsynthesizedundervariousconditionsweremeasured.Furthermore,theeffectofchemicalstructurechangesoftheUFresinontheformaldehydeemissionfromplywoodwasexamined・Theexperimentalresultsshowedthattherelativerigidity(G;/Go)oftheUFresinwasnearlyconstantinthetemperaturerangeofT,toT,.ItwasestimatedfromtheG//GovaluethatwhentheUFresinwassynthesizedwithhighformaldehyde/urea(F/U)molarratio,thecross-linkedstructurewasformedbytheliquid-to-rubbertransformationintheUFresin.WhentheUFresinwithhighF/Uratiowascuredat115℃,arelativelyhigheramountofdimethyleneetherbondandmethylolgroup,whichareeasilyhydrolyzed,andmethyleneglycolwerefoundinthecuredresins.Accordingly,itwassuggestedthattheamountofformaldehydeemissionfromtheplywoodincreasedalongwiththeincreaseofF/Uratioowingtotheformationofeasilyhydrolyzedfunctiongroupsandincludingmethyleneglycolinthegelledrubberresin.
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Original Paper
  • EffectofGasMixingonPlasmaPolymerizationofEthyleneatAtmosphericPressure
    Eishi KATAKAMI, Tohru UEHARA, Hiroyuki KATAYAMA
    2003 Volume 39 Issue 9 Pages 327-333
    Published: September 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.327
    JOURNAL FREE ACCESS
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    Cellophanewasplasmatreatedinethyleneatatmosphericpressure,fortheaimingofformingahydrophobicsurface・Contactangleswithdiiodomethane,glycerineandwatei､weremeasured,andsurface-freeenergyofsolidsurfaceswascalculated.FT-IRspecti､aweretakenforplasma-treatedcellophanes.Theamountofdepositionwascalculatedbyweightincreasebeforeandaftertheplasmatreatment・Surfacesofplasma-treatedcellophanewereobservedbyaSEM.Acellophanesurfacewaschangedfromhydrophilictohydrophobicbyplasmatreatment.FT-IRspectrasuggestedthattherewasdefinitequantityof-CH2CH2-and>C=0groupsonplasmatreatedcellophane.Theamountofdepositionincreasedwithanincreaseofethylenecontentinnitrogen,carbondioxideorargonmixedgas.FromtheresultsofSEMobservation,asubstancedepositedonsurfacesofcellophanetreatedbymixedgasesshowedtheshapeoffinethreadandthethreadswereentangledofthemselves.
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