Faculty Member
Virginia Polytechnic Institute and State University, Department of Chemistry, Blacksburg, VA, USA
Ph.D. in Chemistry, 2005
Koç University, Department of Chemistry, Istanbul, Turkey
B.Sc. in Chemistry, 2001
Polymer synthesis, characterization and structure-property relationships, polyurethane chemistry, surface coatings, adhesives, structural composites, polymeric nanocomposites, carbon nanomaterials, carbon nanotubes, energy materials.
Peer-Reviewed Articles:
1. M. R. Loos, J. Yang, D. L. Feke, I. Manas-Zloczower, S. Unal, U. Younes, “Enhancement of fatigue life of polyurethane composites containing carbon nanotubes” Composites Part B: Engineering, 2013, 44, 740-744.
2. S. Unal, G. I. Ozturk, K. M. Sisson, T. E. Long, “Poly(caprolactone) containing highly branched segmented poly(ester urethane)s via A2 with oligomeric B3 polymerization” Journal of Polymer Science Part A: Polymer Chemistry, 2008, 46, 6285-6295.
3. C. Oguz, S. Unal, T. E. Long, M. A. Gallivan, “Interpretation of molecular structure and kinetics in melt condensation of A2 oligomers, B3 monomers, and monofunctional reagents” Macromolecules, 2007, 40, 6529-6534.
4. Q. Lin, S. Unal, A. R. Fornof, R. S. Armentrout, T. E. Long, “Synthesis and characterization of telechelic phosphine oxide polyester macroligands and cobalt(II) chloride polymer complexes” Polymer, 2006, 47, 4085-4093.
5. L. Supriya, S. Unal, T. E. Long, R. O. Claus, “Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach” Chemistry of Materials, 2006, 18, 2506-2512.
6. S. Unal, T. E. Long, “Highly branched poly(ether ester)s via cyclization-free melt condensation of A2 oligomers and B3 monomers” Macromolecules, 2006, 39, 2788-2793.
7. Q. Lin, S. Unal, A. R. Fornof, I. Yilgor, T. E. Long, “Highly branched poly(arylene ether)s via oligomeric A2 + B3 strategies” Macromolecular Chemistry and Physics, 2006, 207, 576-586.
8. J. P. Sheth, S. Unal, E. Yilgor, I. Yilgor, F. L. Beyer, T. E. Long, G. L. Wilkes, “A comparative study of the structure-property behavior of highly branched segmented poly(urethane urea) copolymers and their linear analogs” Polymer, 2005, 46, 10180-10190.
9. S. Unal, C. Oguz, E. Yilgor, M. Gallivan, T. E. Long, I. Yilgor, “Understanding the structure development in hyperbranched polymers prepared by oligomeric A2 + B3 approach: Comparison of experimental results and simulations” Polymer, 2005, 46, 4533-4543.
10. M. G. McKee, S. Unal, G. L. Wilkes, T. E. Long, “Branched polyesters: Recent advances in synthesis and performance” Progress in Polymer Science, 2005, 30, 507-539.
11. S. Unal, Q. Lin, T. H. Mourey, T. E. Long, “Tailoring the degree of branching: Preparation of poly(ether ester)s via copolymerization of poly(ethylene glycol) oligomers (A2) and 1,3,5-benzenetricarbonyl trichloride (B3)” Macromolecules, 2005, 38, 3246-3254.
12. M. G. McKee, T. Park, S. Unal, I. Yilgor, T. E. Long, “Electrospinning of linear and highly branched segmented poly(urethane urea)s” Polymer, 2005, 46, 2011-2015.
13. S. Unal, I. Yilgor, E. Yilgor, J. P. Sheth, G. L. Wilkes, T. E. Long, “A new generation of highly branched polymers: Hyperbranched, segmented poly(urethane urea) elastomers” Macromolecules, 2004, 37, 7081-7084.
14. I. Yilgor, B. D. Mather, S. Unal, E. Yilgor and T. E. Long, “Preparation of segmented, high molecular weight, aliphatic poly(ether-urea) copolymers in isopropanol: In-situ FTIR studies and polymer synthesis” Polymer, 2004, 45, 5829-5836.
15. Q. Lin, S. Unal, A. R. Fornof, Y. Wei, H. Li, R. S. Armentrout, T. E. Long, “Synthesis and characterization of poly(ethylene glycol) methyl ether endcapped poly(ethylene terephthalate)” Macromol. Symp. 2003, 199, 163-172.
Book Chapters:
1. S. Unal, G. I. Ozturk, T. E. Long, “Synthesis of hyperbranched polymers via polymerization of functionally symmetric monomer pairs” in Hyperbranched Polymers: Synthesis, Properties, and Applications (eds D. Yan, C. Gao and H. Frey), John Wiley & Sons, Inc., Hoboken, NJ, USA, 2011, pages 79-106.
Conference Proceedings:
1. U. Younes, S. Unal “New generation polyurethane-based fiber reinforced composites for vacuum infusion and the effect of multi-walled carbon nanotubes on their performance”, American Composites Manufacturers Association (ACMA) Composites Show, Las Vegas, NV, February 2012.
2. C. Oguz, S. Unal, T. E. Long, M. G. Gallivan, “Evolution of molecular structure in melt condensation of A2 + B3 hyperbranched polymers” Polymer Preprints (ACS, Div. of Polym. Chem.), 2008, 49, 36.
3. E. Anderson, S. Unal, T. E. Long, “Phosphonium cations as a new avenue for electrostatic interactions in polymer design” Polymer Preprints (ACS, Div. of Polym. Chem.), 2008, 49, 262.
4. E. Anderson, S. Unal, T. E. Long, “Synthesis and association of phosphonium cation-containing polyesters for food packaging applications” Polymer Preprints (ACS, Div. of Polym. Chem.), 2007, 48, 731.
5. I. Yilgor, E. Yilgor, S. Unal, A. Fornof, T. E. Long, J. P. Sheth, G. L. Wilkes, “AFM Investigation of Segmented, Highly Branched Polyurethaneureas” Polymer Preprints (ACS, Div. of Polym. Mater. Sci. Eng.), 2006, 94, 309.
6. S. Unal, M. G. McKee, D. J. Massa, T. E. Long, “Synthesis and characterization of phosphonium-based telechelic polyester ionomers” Polymer Preprints (ACS, Div. of Polym. Chem.), 2005, 46, 1028.
7. S. Unal, C. M. Palmer, T. E. Long, “Synthesis of phosphonium-based acrylic ionomers” Polymer Preprints (ACS, Div. of Polym. Chem.), 2005, 46, 1064.
8. K. M. Sisson, S. Unal, T. E. Long, “Poly(caprolactone) based, highly branched segmented poly(ester urethane)s and poly(ester urethane urea)s via A2 and B3 methodologies” Polymer Preprints (ACS, Div. of Polym. Chem.), 2005, 46, 695.
9. S. Unal, I. Yilgor, E. Yilgor, Q. Lin, T. H. Mourey, T. E. Long, “Synthesis of segmented hyperbranched polymers using oligomeric A2 and B3 polymerization strategies” Polymer Preprints (ACS, Div. of Polym. Mater. Sci. Eng.), 2004, 91, 262.
10. I. Yilgor, J. P. Sheth, S. Unal, E. Yilgor, G. L. Wilkes, T. E. Long, “Structure-property relations in segmented, hyperbranched polyetherurea elastomers” Polymer Preprints (ACS, Div of Polym. Mater. Sci. Eng.), 2004, 91, 12.
11. C. Oguz, S. Unal, E. Yilgor, M. Gallivan, T. E. Long, I. Yilgor, “Understanding the structure development in hyperbranched polymers prepared by oligomeric A2+B3 approach: comparison of simulations and experimental results” Polymer Preprints (ACS, Div of Polym. Mater. Sci. Eng.), 2004, 91, 443.
12. Q. Lin, S. Unal, T. E. Long, “Polymerization of A2 and B3 monomers: A novel approach to hyperbranched polyarylates” Polymer Preprints (ACS, Div of Polym. Mater. Sci. Eng.), 2003, 88, 544.
13. Q. Lin, S. Unal, A. R. Fornof, Y. Wei, T. E. Long, “Synthesis and characterization of poly(ethylene glycol) endcapped poly(ethylene terephthalate) with decreased protein adhesion” Polymer Preprints (ACS, Div. of Polym. Chem.), 2003, 44(1), 191.
14. E. Yilgor, S. Unal, U. Makal, I. Yilgor, “Influence of hydrogen bonding on the properties of silicone copolymers” Polymer Preprints (ACS, Div. of Polym. Chem.), 2001, 42(1), 120.
15. I. Yilgor, E. Yilgor, S. Unal, U. Makal, M. Gordeslioglu, E. Yurtsever, “New model for the microphase morphology of segmented polyurethanes and polyureas” Polymer Preprints (ACS, Div. of Polym. Chem.), 2001, 42(1), 438.
Other Publications:
Patents Granted:
1. S. Sommer, E. Luehmann, S. Unal, M. J. Dvorchak, “Process for the production of sized and/or wet-strength papers, paperboards and cardboards”, Bayer MaterialScience LLC, US8647471.
2. Y. Berezkin, P. D. Schmitt, S. Unal, “Polyurethane dispersions for use in personal care products” Bayer MaterialScience LLC, Patent Numbers: US7445770, US8114938, EP1970391.
3. Y. Berezkin, P. D. Schmitt, S. Unal, “Polyurethane dispersions based on polycarbonate polyols and suitable for use in personal care products” Bayer MaterialScience LLC, Patent Numbers: US7452525, US8034322, EP2028205.
Patent Applications Published/Pending:
1. R. R. Roesler, L. Gindin, S. Unal, P. D. Schmitt, R. M. Konitsney, “Radiation-Curable Polyurethane Dispersions”, Bayer MaterialScience LLC, US20140120353.
2. U. Younes, R. Hunt, S. Unal, E. Giles, J. Matsco, “Composites having high levels of carbon nanotubes and a process for their production”, Bayer MaterialScience LLC, US20130256605.
3. U. Younes, S. Unal “Reinforced Composites Produced by a Vacuum Infusion or Pultrusion Process”, Bayer MaterialScience LLC, US20130216390.
4. S.Unal, Y. Berezkin, P. Schmitt, K. Haider “Aqueous Dispersions of Polyurethane and Nanoparticles”, Bayer MaterialScience LLC, US20130101540.
5. S. Unal, R. Hunt, H. Hocke, “Vapor phase functionalization of carbon nanotubes” Bayer MateriaScience LLC, Application Number: US20120234204.
6. I. Yilgor, S. Unal, E. Yilgor, T. E. Long, Q. Lin, “Hyperbranched segmented copolymers and methods of making same for fuel cells” Virginia Tech Intellectual Properties, Application Number: WO2005060444.