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 4
Displaying 1-5 of 5 articles from this issue
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Review
Review
Original Paper
  • PropertiesofPhotocrosslinkedAcrylicSiloxane-phenylEster
    Kimihiro MATSUKAWA, Hiroshi IOUE
    2003 Volume 39 Issue 4 Pages 146-151
    Published: April 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.146
    JOURNAL FREE ACCESS
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    Severalacrylicsiloxane-phenylesterswerepreparedbyesterificationreactionsofsiloxanecompoundscontainingtwoorthreehydoxyphenylgroupswithacryloylchlorideormethacryloylchloride.Byusingbenzoinethyletherasaphotoinitiator.thesebi-andtri-functionalsiloxaneacrylateswerepolymerizedtogivecrosslinkedfilms.Andthephotocrosslinkedcopolymersweregeneratedwithmethylmethacrylateordimethylaminoethylmethacrylate.theirpropertiessuchasheatresistance,waterrepollency,andsurfacehardnesswereevaluated.TheresultsofRamanspectroscopyandgelationratioshowedthatphotocrosslinkingofacrylicsiloxane-phenylestersproceededmorethanmethacrylicsiloxane-phenylesters･Heatresistanceofacrylicsiloxanephenylesters,which5wt%losstemperaturewashigherthan400℃,werehigherthanthatofmethacrylicsiloxane-phenylesters.Itwasfoundthatwaterrepellencyofphotocrosslinkedfilmsbyameasurementofwatercontactanglewasdependentonthecontentsofsiloxanegroups
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Original Paper
  • ElectricalandHeatingPropertiesofFlake-likeParticleFilledPolymerPlaneHeater
    Ryozo KUROSAKI, Takeshi KITANO
    2003 Volume 39 Issue 4 Pages 136-145
    Published: April 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.136
    JOURNAL FREE ACCESS
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    Theconductivecompositesarepreparedbyepoxy(EP)andurethane(UR)resigndispersedwithnickel-coatedsericite(Ni-S)andcured.Variousfactorssuchasfillercontent,temperature,processing,curingconditionsandexpansioncoefficientofmatrixpolymerinfluencedonelectricalconductivityofthecompositesareinvestigatedexperimetally・Heatingbehaviorsofthesematerialsarealsocharacterizedbysurfacetemperaturemeasurements.Itwasfoundthatvolumeresistivitydecreasesexponentiallywithanincreaseoffillercontent,anddifferentcriticalcontentsinwhichvolumeresistivitychangestoanincreaseareobservedforeachcomposite.Thetemperatureandexpansionofmatrixpolymerdependenciesofresistivityofthecompositeswereshowntobeingoodcorrelation.Ni-S/URcompositesshowedthePositiveTemperatureCoefficient(PTC)effecthigherthanNi-S/EPcomposites.Ni-S/URcompositesshowedPTCeffectsbyheatingunderanincreasedenvironmentaltemperatureandalsoundersuppliedvoltage.
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Original Paper
  • EffectofParticleSizeandMixingRatioofSugiSawdustontheStrengthPropertiesofPolypropylene-SugiSawdustCompositeMateria
    Chieko Ohira, Tomoyasu SAKUNO
    2003 Volume 39 Issue 4 Pages 131-135
    Published: April 01, 2003
    Released on J-STAGE: October 31, 2014
    DOIhttps://doi.org/10.11618/adhesion.39.131
    JOURNAL FREE ACCESS
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    Theeffectofparticlesizeandmixingratioofsugi(Cryptomeria血ponicaD.Don)sawdustondensityandontensileandbendingstrengthsofcompositematerialsmadefrompolypropylene(PP)andsugisawdustwasinvestigated.UntreatedsawdustwhichwasclassifiedintosixparticlesizegroupsfromP150(particlespassing100mesh)to850(particlespassing16mesh.retainedat18mesh)wasusedasfillerforthecompositematerial.Itwasrevealedthateventheroughestsugisawdust(particlesize850)couldbeusedasfiller・Asparticlesizeincreased,thedensityandtensileandbendingstrengthsofthecompositematerialsdecreased・WhenmixedwithPPindifferentproportionsofsawdust,itwaspossibletoutilizesawdustofparticlesize150(particlespassing50mesh,retainedatlOOmesh)asfillerataratiooffrom20%to60%.Inthiscase,thedensityofthecompositematerialsincreasedwhentheratioofsawdustincreased.Thetensileandbendingstrengthsofsampleswith20%sawdustwerelowerthanthoseofpurePP・ThestrengthsslightlydecreasedastheratioofsawdustincreasedHowever,thevalueofthetensileandbendingstrengthsofmaterialswitha20%mixedraticandwitha60%mixedratioshowedinsignificantdifferences
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