Department of Chemistry

Prof GJ Summers

College of Science, Engineering and Technology
School of Science
Department: Chemistry
Professor
Tel: 012 429 8020 / 011 670 9305
E-mail: summegj@unisa.ac.za

Qualifications

  • BSc (UWC)
  • BScHons (UStell)
  • MSc (Akron, USA)
  • PhD (Akron, USA)
  • HED (UNISA)

Currently teaching

  • CHE4808: Chemistry Honours Research Project
  • CHE4806: Organic Polymer Chemistry
  • CHE1502: General Chemistry 1B

Fields of academic interests

  • Organic Polymer Chemistry

Field of Specialisation

Organic synthesis; polymers; Polymer synthesis and mechanism; Functionalized polymers by controlled/ living free radical polymerization, anionic polymerization and step growth polymerization methods; Polymerization kinetics; Polymerization processes; Polymers for industrial applications; Macromolecular engineering; Nanomolecular engineering.

Journal articles

  • “Electrochemical, morphological and spectroscopic study of poly(aniline-co-o-bromoaniline) (PA-co-o-BrA) conducting copolymer”, US Waware, GJ Summers, AMS Hamouda and M Rashid, Ionics, 24, 1701-1708 (2018). DOI.org/10.1007/s11581-017-2335-z

  • “Synthesis and characterization of polyaniline, poly(3-fluoroaniline) and poly(aniline-co-3-fluoroaniline) derivatives obtained by chemical oxidative polymerization methods”, US Waware, GJ Summers, M Rashid and AMS Hamouda, Polym Plastics Tech Eng 57(10), 1015-1025, (2018) DOI.org/10.1080/03602559.2017.1370108.

  • “Polyimides and sulfonated polyimides derived from functionalized 1,1-diphenylethylene derivatives”,
    GJ Summers, MG Kasiama and CA Summers, Macromol Symp 375(1) 1600174 (2017), 10 pages.

  • “Tuning the Electrical Properties of Polyaniline by Copolymerization with o-bromoaniline”, US Waware, AMS Hamouda, AS Hameed and GJ Summers, Funct Mater Lett 10(4), 1750039 (2017), 6 pages.

  • “The spectral and morphological studies of the conductive polyaniline thin film derivatives by the in situ copolymerization”, US Waware, AMS Hamouda, M Rashid, GJ Summers, J Mater Sci Mater Electron, 28(20) 15178-15183 (2017).

  • “Synthesis and characterization of electrically conductive poly(aniline-co-3-bromoaniline) nanocomposites", US Waware; AMS Hamouda, AS Hameed and GJ Summers, J Mater Sci Mater Electron,
    28(14), 10693-10699, (2017).

  • “Poly(ether ether sulfones)s and Sulfonated Poly(ether ether sulfone)s derived from Functionalized 1,1-Diphenylethylene Derivatives”, GJ Summers, MG Kasiama and CA Summers, Polym Int 65, 798-810 (2016).

  • Conducting Polyaniline Nanorods doped with Aromatic Carboxyl Chain End Functionalized Polystyrene”, GJ Summers, US Waware, MR Maduwa and CA Summers, Synthetic Metals 209, 251-261 (2015).

  • “The Preparation of α-Bis and α,ω-Tetrakis Aromatic Oxazolyl and Carboxyl Functionalized Polymers using“1,1-Bis[4-(2-(4,4-dimethyl-1,3-oxazolyl))phenyl]ethylene in Atom Transfer Radical Polymerization Reactions”, GJ Summers, RB Maseko and CA Summers, Polym Intl 63, 1785-1796 (2014).

  • “The Syntheses of α-Bis(4-Aminophenyl) and α,ω-Tetrakis(4-aminophenyl) Functionalized Polymers using 1,1-Bis(4-aminophenyl)ethylene in Atom Transfer Radical Polymerization Reactions” GJ Summers,
    MP Ndawuni and CA Summers, Polym Intl, 63, 876-886 (2014).

  • “The Syntheses of Aromatic Oxazolyl and Carboxyl Functionalized Polymers using 4,5-Dihydro-4,4-dimethyl-2-[4-(1-phenylethyl)phenyl]oxazole in Atom Transfer Radical Polymerization Reactions” GJ Summers, RB Maseko and CA Summers, Eur Poly J, 49, 1111-1127 (2013).

  • “α-Bis and α,ω-Tetrakis(4-dimethylaminophenyl) Functionalized Polymers by Atom Transfer Radical Polymerization using 1,1-Bis[(4-dimethylamino)phenyl]ethylene as Tertiary Diamine Initiator Precursor anf Functionalizing Agent”, GJ Summers, MP Ndawuni and CA Summers, Polym Intl 61, 1353-1361 (2012).

  • “The Synthesis of Aromatic Oxazolyl and Carboxyl Functionalized Polymers by Atom Transfer Radical Polymerization: The Atom Transfer Radical Polymerization of Styrene initiated by 2-[4-(bromomethyl)-phenyl]-4,5-dihydro-4,4-dimethyloxazole”, GJ Summers, RB Maseko, MP Beebeejaun and CA Summers,
    J Poly Sci Part A Polym Chem 49, 2601, (2011).

  • “Mechanical Properties of Ternary Blends of ABS + HIPS + PETG”, WW Focke, S Joseph, J Grimbeek,
    GJ Summers and B Kretzschmar, Polymer-Plastics Technology and Engineering, 48,  814 (2009).

  • “SEM Studies of Surfactant-Assisted Micro-Mixing of Melamine and Wax Particles”, E Karakatsanis,
    WW Focke and GJ Summers, J Appl Poly Sci 99, 2554-2557 (2006).

  • “Dipyridyl Functionalized Polysulfone for Membrane Production” GJ Summers, MP Ndawuni and
    CA Summers, J. Membr Sci 226, 21 (2003).

  • “Primary Amine Functionalized Polystyrene by Atom Transfer Radical Polymerization”, GJ Summers,
    MP Ndawuni, and CA Summers, Polym Intl 52, 158 (2003.

  • “Low Molar Mass Poly(styrene-co-acrylate acid) Amphiphilic Block Copolymers: Synthesis and Characterization, E Karakatsanis, WW Focke and GJ Summers, Macromol Symp 193, 187 (2003).

  • “Chemical Modification of Polysulfone: Anionic Synthesis of Dipyridyl Functionalized Polysulfone”,
    GJ Summers, MP Ndawuni and CA Summers, Polymer 42, 397-402 (2001).

  • “Tertiary Amine Functionalized Polystyrene by Atom Transfer Radical Polymerization”, GJ Summers,
    MP Ndawuni and CA Summers, J. Polym Sci Part A Polym Chem 39, 2058 (2001).

  • “Synthesis of aromatic carboxyl functionalized polystyrene by atom transfer radical polymerization”,
    GJ Summers, MP Beebeejaun and CA Summers, Polym Intl 49, 1722 (2000).

  • "The synthesis of a hydrocarbon-soluble organolithium anionic initiator: A gas-liquid chromatographic study of the reaction of sec-butyllithium with p-divinylbenzene", GJ Summers, CA Summers and coworkers, Polymer 40 5429-5437 (1999).

  • “Anionic Synthesis of Aromatic Amide and Carboxyl Functionalized Polymers. Chain End Functionalization of Poly(styryl)lithium with N,N-Diisopropyl-4-(1-phenylethenyl)benzamide”, GJ Summers and RP Quirk, J Polym Sci Part A Polym Chem 36, 1233-1241 (1998).

  • "Anionic synthesis of aromatic carboxyl functionalized polymers. Chain end functionalization of poly(styryl)lithium with 4,5-dihydro-4,4-dimethyl-2-[4-(1-phenylethenyl)phenyl]oxazole", GJ Summers and
    RP Quirk, Polym Intl 40 79-86 (1996).