12 Amorphous Solids.pptx - Structure of Materials 6:...

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MSE 2001 – Prof. LosegoGeorgia TechRecommended Readings:Schafferet al. (More complete): Chapter 6Ashbyet al.: Section 4.4Structure of Materials 6:Polymers and Other Amorphous Solids(i.e., Non-Crystalline Solids or “Glasses”)
MSE 2001 – Prof. LosegoGeorgia TechWhat is a glass?Definition 1: A ______________________ solidDefinition 2: A ______________________ solid.This is also known asan ______________________ solidDefinition 3:A solid without ________________________________
MSE 2001 – Prof. LosegoGeorgia TechShort-Range vs. Long-Range OrderTridymiteQuartz“Glass”All have SiO4tetrahedra that are corner-shared (i.e., same short-range order)
MSE 2001 – Prof. LosegoGeorgia TechThe structure of SiO2glass in “2D”CrystallineAmorphous
MSE 2001 – Prof. LosegoGeorgia TechAtomic Imaging of SiO2Glass by TEMLichtenstein, L.; Büchner, C.; Yang, B.; Shaikhutdinov, S.; Heyde, M.; Sierka, M.; Włodarczyk, R.; Sauer, J.; Freund, H.-J.; The atomic structure ofa metal-supported vitreous thin silica film,Angewandte Chemie International Edition51, 404-407 (2012)
MSE 2001 – Prof. LosegoGeorgia TechAtomic Imaging of SiO2by TEMLichtenstein, L.; Heyde, M.; Freund, H.-J.; Atomic arrangement in two-dimensional silica: from crystalline to vitreousstructures, TheJournal of Physical Chemistry C116, 20426-20432 (2012)
MSE 2001 – Prof. LosegoGeorgia TechX-ray Diffraction of SiO2: Crystalline & Amorphous
MSE 2001 – Prof. LosegoGeorgia TechUsing Scattering to Study SRO:Radial Distribution FunctionsA related measurement is “Pair Distribution Functions” (or PDFs)Distance (nm)Scattering Intensity
MSE 2001 – Prof. LosegoGeorgia TechWhat about polymers?Do polymers have short range order?What is theSRO in apolymer?
MSE 2001 – Prof. LosegoGeorgia TechMonomers & Their Polymers:Chain Growth(orAddition Polymerization)MonomerPolymerMethyl methacrylatePMMAStyrenePolystyreneVinyl ChloridePVCFree Radical PolymerizationMonomerPolymerMonomerPolymerIonic addition polymerization is another form of addition polymerization – similar except “ions”drive the addition.***1.2.3.*4.…Etc…polymer.html
MSE 2001 – Prof. LosegoGeorgia TechMonomers & Their Polymers:Step Growth(orCondensation Polymerization)Monomer(s)PolymerdiisocyanatediolPolyurethaneDiamineDicarboxylic AcidNylonAmino AcidPolypeptide1.

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Term
Fall
Professor
NoProfessor
Tags
Polymer, Glass, Polymer chemistry

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