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------=_NextPart_01C68C9B.E985D700 Content-Location: file:///C:/4F8B5EB9/PolymerMaterialsfortheRollerIndustry_files/master07.xml Content-Transfer-Encoding: quoted-printable Content-Type: text/xml; charset="utf-8" ------=_NextPart_01C68C9B.E985D700 Content-Location: file:///C:/4F8B5EB9/PolymerMaterialsfortheRollerIndustry_files/pres.xml Content-Transfer-Encoding: quoted-printable Content-Type: text/xml; charset="utf-8" ------=_NextPart_01C68C9B.E985D700 Content-Location: file:///C:/4F8B5EB9/PolymerMaterialsfortheRollerIndustry_files/slide0001.htm Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="us-ascii" Polymer Materials for the Roller Industry
Polymer Materials
for the Roller Industry
Carl D. McAfee, Ph.D.
McAfee Consulting LLC
1 October 2003
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Background
nMcAfee Consulting LLC
nPolymer chemistry- experience rubber & plastics =
nRemco
nMachine builders – building machines for both =
nSPB Corp.
nSupplying materials over wide range of polymers
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Objective of this talk
nRemind you of the different types of polymers
nDefinitions, parameters, etc.
nIllustrate progress made in last few years
nDiscuss challenges in manufacturing
nPellets must be dried to remove adsorbed H2<= /span>O
nDiscuss new product enhancements
nDynamic, thermal, barrier, fatigue, & lifetime <= /span>
nProvide references & sources for further study
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Polymer Types (physical considerations)
nThermoplastic
nLinear, non-crosslinked, service temp. below melting point, recyclable &= amp; reprocessable, viscosity & Tg considerations
nThermoset
nNetworked, cross linked, higher service temps.
nPolymer Alloys
nThermoplastic phase surrounding a thermoset phase, gives properties of both
n
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Polymer Types (chemical considerations)
nWe can further define polymer types by the chemistry of the “pieces” in the polymer
nPolar & Non-polar polymers
nPolar has electronegativity
nNon-polar does not have electronegativity
nExample -> oil & water do not readily mix
n-> oil & gasoline are both hydrocarbons & mix
nWe must consider these thoughts with polymers and their given applications
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Examples
nPolar Polymers
nNBR, TPU, SIS, SBS, SEBS, PC, PA, CR, FL
nNon-Polar Polymers
nPP, PE, EPDM, Butyl, Isoprene
nMatched Examples
nNBR polymer in an oilfield application
nEPDM polymer in an acidic or basic application
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Applications
nImportant to match polymer material to requirements of the given application
nQuestions to ask
nWhat type of physical properties do I need?
nWhat type of chemical resistance do I need? <= /div>
nWhat type of dynamic properties do I need?
nHow often will I need to replace this material?
nHow much can I spend on this material?
nDo I need to be able to recycle this material?
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Polymers can be compounded
nPolymers can be formulated for specific properties
<= span class=3DBB style=3D'position:absolute;left:-4.57%;top:.1em'>nCompou= nded in a variety of mixers
<= span class=3DBB style=3D'position:absolute;left:-4.5%;top:.1em'>nCan ext= end, add oils, fillers, or curatives
nGreatly enhance the capabilities of an already wide range of materials
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Polymer Reinforcement Options
nTraditional - Carbon black
nParticle size approx. 5-10 microns
nChemical nature – hydrocarbon – non-polar
nTypical use levels up to 100 phr
nConventional - Silica
nParticle size approx. 1 micron
nChemical nature – neutral
nTypical use levels up to 50 phr
nNext Generation - Nanoclays
nParticle size approx. 0.1 micron
nChemical nature – variable – polar to non-polar
nTypical use levels up to 20 phr
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New Product Enhancements
nDynamic <= /div>
nBetter chance for polymer to heal
nThermal <= /div>
nIncreased stability & flame retardancy
nBarrier <= /div>
nMicro barrier for in= c. resistance to gases & solv.
nFatigue <= /div>
nLess chance for crack propagation
nLifetime =
nAll of the above translates into longer lifetimes
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Useful Websites
nThermoplastics, thermosets, & elastomers
nwww.spbcorp.com 
nwww.matweb.com
nwww.rubbernews.com
nwww.plasticnews.com
n= www.uspto.gov 
nSearch engines -> TPE, TPV, TPO, MPR
nEquipment -> = www.rollerequipment.com
nPolymer Consultants -> www.prochemist.com 
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References
nUniversities
nAkron, Texas A&M, Univ. of Texas, Southern Mississippi, Cornell, etc.&= #13;
nNanocomposites 2002, Delivering New Value to Polymers, 23-25 Sep 2002, San Die= go, CA
nACS National Meetings – rubber & plastics
nANTEC National Meetings
nSPE Local Meetings
nSPI National & Local Meetings
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Contact Information
nCarl D. McAfee, Ph.D.
nMcAfee Consulting LLC
n1016 Kennedale-Sublett Road
nP.O. Box 36, Kennedale, TX 76060
n= cmcafee@prochemist.com
n817-483-4126 main office
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