Research Outputs

Permanent URI for this communityhttps://hdl.handle.net/20.500.14288/2

Browse

Filters

Advanced Search

Filter by

Settings

Quartile: search.filters.quartile.N/ASubject: search.filters.subject.Chemistry, physical and theoretical

Search Results

Now showing 1 - 10 of 17
  • Placeholder
    PublicationMetadata only
    AFM investigation of segmented, highly branched polyurethaneureas
    (American Chemical Society (ACS), 2006) Fornof, Ann R.; Long, Timothy E.; Sheth, Jignesh; Wilkes, Garth L.; Department of Chemistry; Department of Chemistry; Department of Chemistry; Department of Chemistry; Yılgör, İskender; Yılgör, Emel; Ünal, Serkan; Faculty Member; Researcher; Undergraduate Student; College of Sciences; College of Sciences; College of Sciences; 24181; 40527; 241611
    N/A
  • Placeholder
    PublicationMetadata only
    Exploring the architectural and hydrogen bonding mediated long-range connectivity of the hard segment phase in model oligomeric polyurethanes
    (American Chemical Society (ACS), 2004) Sheth, JP; Fornof, AR; Long, TE; Wilkes, GL; Department of Chemistry; Department of Chemistry; Yılgör, İskender; Faculty Member; College of Sciences; 24181
    N/A
  • Placeholder
    PublicationMetadata only
    Fabrication of microporous pla foams via thermally induced phase separation and solvent exchange
    (American Chemical Society (ACS), 2017) Department of Chemistry; Department of Chemistry; N/A; Department of Chemistry; Yılgör, İskender; Yılgör, Emel; Önder, Özgün Can; Faculty Member; Researcher; PhD Student; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; 40527; 24181; N/A
    N/A 
  • Placeholder
    PublicationMetadata only
    High molecular weight, high strength silicone-urea elastomers: preparation and properties.
    (American Chemical Society (ACS), 2002) Department of Chemistry; Department of Chemistry; Department of Chemistry; Yılgör, İskender; Yılgör, Emel; Faculty Member; Researcher; College of Sciences; College of Sciences; 24181; 40527
    N/A 
  • Placeholder
    PublicationMetadata only
    Influence of competitive hydrogen bonding between hard and soft segments on the properties of siloxane and polyether-based segmented copolymers.
    (Amer Chemical Soc, 1999) Department of Chemistry; Department of Chemistry; N/A; Department of Chemistry; Yılgör, İskender; Burgaz, Engin; Metin, Burak; Yurtsever, İsmail Ersin; Yılgör, Emel; Faculty Member; Undergraduate Student; Undergraduate Student; Faculty Member; Researcher; College of Sciences; College of Sciences; N/A; 24181; 17956; N/A; N/A; 40527
    N/A 
  • Placeholder
    PublicationMetadata only
    Mussel inspired coatings based on tannic acid and polyamines
    (American Chemical Society (ACS), 2017) Department of Chemistry; Department of Chemistry; N/A; Department of Chemistry; Yılgör, İskender; Yılgör, Emel; Söz, Çağla Koşak; Faculty Member; Researcher; PhD Student; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; 24181; 40527; N/A
    N/A 
  • Placeholder
    PublicationMetadata only
    Novel polyisobutylene-based polyureas
    (Amer Chemical Soc, 2009) Jewrajka, Suresh K.; Kennedy, Joseph P.; Department of Chemistry; Department of Chemistry; Department of Chemistry; Yılgör, İskender; Yılgör, Emel; Faculty Member; Researcher; College of Sciences; College of Sciences; 24181; 40527
    N/A
  • Placeholder
    PublicationMetadata only
    POLY 598-contribution of soft segment entanglements on the tensile properties of silicone-urea copolymers with low hard segment contents
    (American Chemical Society (ACS), 2009) Wilkes, Garth; Department of Chemistry; N/A; Department of Chemistry; Department of Chemistry; Department of Chemistry; Yılgör, Emel; Eynur, Tuğba; Bakan, Murat; Yılgör, İskender; Researcher; Master Student; Undergraduate Student; Faculty Member; College of Sciences; Graduate School of Sciences and Engineering; College of Sciences; College of Sciences; 40527; N/A; N/A; 24181
    Novel, segmented thermoplastic silicone–urea (TPSU) copolymers based on rather high molecular weight aminopropyl terminated polydimethylsiloxane (PDMS) soft segments ( 10,800 and 31,500 g/mol), a cycloaliphatic diisocyanate (HMDI) and various diamine chain extenders were synthesized. Copolymers with very low urea hard segment contents of 1.43–14.4% by weight were prepared. In spite of very low hard segment contents, solution cast films showed very good microphase separation and displayed reasonable mechanical properties. Tensile strengths of TPSU copolymers showed a linear dependence on their urea hard segment contents, regardless of the structure of the diamine chain extender used. The modulus of silicone–urea copolymers is dependent on the urea concentration, but not on the extender type or PDMS molecular weight. When silicone–urea copolymers with identical urea hard segment contents were compared, copolymers based on PDMS-31,500 showed higher elongation at break values and ultimate tensile strengths than those based on PDMS-10,800. Since the critical entanglement molecular weight (Me) of PDMS is about 24,500 g/mol, these results suggest there is a significant contribution from soft segment chain entanglement effects in the PDMS-31,500 system regarding the tensile properties and failure mechanisms of the silicone–urea copolymers. 
  • Placeholder
    PublicationMetadata only
    POLY 708-Photoluminescent rare-earth ion containing silicone copolymers
    (Amer Chemical Soc, 2006) Department of Chemistry; Department of Chemistry; N/A; Department of Physics; Department of Chemistry; Department of Physics; Yılgör, İskender; Yılgör, Emel; Demirbaş, Ümit; Sennaroğlu, Alphan; Kurt, Adnan; Tezgel, Arife Özgül; Faculty Member; Researcher; Master Student; Faculty Member; Teaching Faculty; Undergraduate Student; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; College of Sciences; 24181; N/A; 20328; 23851
    N/A 
  • Placeholder
    PublicationMetadata only
    Polyurethane synthesis revisited: effect of solvent and reaction conditions on prepolymer formation and polymer properties
    (American Chemical Society (ACS), 2014) N/A; Department of Chemistry; Department of Chemistry; Department of Chemistry; Yıldırım, Armen; Yılgör, Emel; Yılgör, İskender; Master Student; Researcher; Faculty Member; Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); Graduate School of Sciences and Engineering; College of Sciences; College of Sciences; College of Sciences; College of Sciences; College of Sciences; N/A; 40527; 24181
    N/A