*** **** *** *******, ********, GA 30736
●Experienced synthetic organic/polymer chemist with experience ranging from small molecule academic research to applied polymer chemistry for commercial purposes and project management.
●Background in chemical engineering.
●Can function equally well as part of interdisciplinary teams or independently.
●Both Ph. D. thesis (University of Rochester, 1996) and work experience in the design, original synthesis and characterization of novel organic materials.
●Proficient in NMR, FTIR, GC/MS, HPLC, GPC, DSC, UV/Vis./NIR, etc. with extensive experience in polymer chemistry (including polyacrylates, polyamides, polyesters, polyimides, and polyetherketones up to five pounds in scale), as well as conducting polymers, and small molecules such as liquid crystals.
●Will relocate and travel as required.
BS, MS, Ph.D. Chemical Engineering, University of Rochester, 1986-1996
Thesis title: “Design And Synthesis Of Vitrifiable Low-Molar-Mass Organic Materials”
Research Advisor: Professor Shaw H. Chen
Shaw Industries, Dalton GA 2008 – Current
●Polymer chemistry knowledge used to support polyamide fiber for consumer textiles, improve (-caprolactam recycling, managing a company funded external project.
●Responsible for producing a small library of phosphorus-containing molecules for testing as flame retardants. Materials that perform the best will be scaled up.
●“Methods for making mineral filler compositions and carpets made from the same” US2014/0287184 A1
●“Process for producing an ester and a diol from reclaimed carpet material” US 9,981,902 B2 2018
Albemarle, Pasadena TX 2007-2008
●Synthesis of phosphorus containing molecules for use as flame retardants.
●Achieved goal of producing economical, and industrially scalable production within 12 months.
AdaptivEnergy, Hampton VA 2006-2007
●Development of hot melt adhesives suitable for the high volume production of laminated piezoelectric devices. A primary source of organic chemistry expertise for the company.
●Duties included both applied polymer chemistry research as well as acting as a primary source of organic chemistry knowledge for the company.
●Responsible for the development of hot melt polyimide adhesives essential for the company’s core product (Ruggedized Laminated Piezoelectric).
●Complex yet economical blends of polyimides with property modifying dopants have been developed which meet PAR’s unique performance requirements have been made on scales suitable for production of thousands of devices per year.
●“Toughened Composite Film for Hot Melt Adhesives”, PAR Technologies Patent Disclosure Letter, with Y. Hu and E. Edrington
●“Hot Melt Thermosetting Polyimide Adhesives Containing Diacetylene Groups”, PAR Technologies Patent Disclosure Letter, with Y. Hu and E. Edrington
●“Polyimide/Copolyimide Films with Low Glass Transition Temperature for Use as Hot Melt Adhesives”, PAR Technologies Patent Disclosure Letter, with Y. Hu and E. Edrington
General Electric Corporate Research Lab, Niskayuna, NY 2004-2005. (contract position)
Simple and suitable for industrial production synthesis of polymers for high temperature solvent resistant structural elements and crosslinked membranes for crude oil separation, and a specific biopolyester.
●Worked on the synthesis and formulation of a high temperature, solvent resistant thermoset, a poly(etheretherketone). A material composition was identified which met a demanding set of product specifications not met by existing polymers.
●Producing membranes for crude oil separation that are the subject of a patent application. Systematic variation of monomer, crosslinker and solvent ratios resulted in a formulation that was successfully scaled up in a pilot plant.
●Synthesized copolyester which incorporated an agriculturally derived substance as monomer in order to enhance the thermal and mechanical properties of an existing parent polymer, poly(butyleneterephthalate). Furthermore, the compound is made from processed corn and will have higher value as a monomer than it would as food.
●“Polyaziridine Membranes”, General Electric Patent Disclosure, with G. Yeager and H. Wang
Naval Research Laboratory, Washington, DC 2000-2004
Center for Bio/Molecular Science and Engineering followed by Chemistry Division. (Post-doc)
●Complex academic synthesis of transparent conducting polymers and conjugated molecules for nanoelectronic applications.
●Responsible for the synthesis of a series of novel monomers for use in making conducting polymer, specifically a substituted poly(ethylenedioxythiophene). Substituent groups were varied to yield a high electrical conductivity but still transparent polymer, U.S. patent 6,867,281.
●A novel low molecular weight conjugated oligomer with property defining side and end groups was synthesized for use as a template for a nanometer scale connection between electrodes. Polymer end groups were designed make the oligomer bridge the gap between two nearby metal surfaces. The repeat unit structure was designed to attract clusters consisting of a few thousand gold atoms out of solution. The goal was the formation of a “rope” consisting of only a few million atoms anchored between electrodes.
●““Highly conducting and transparent thin films formed from new fluorinated derivatives of 3,4-ethylenedioxythiophene” US6,867,281 B2 2005
University of Rochester, Rochester, New York 1996-2000
Department of Chemical Engineering followed by post-doctoral fellowship at the NSF Center for Photoinduced Charge Transfer.
●Original molecular design and complex synthesis of a variety of liquid crystals, polymers and photosensitive compounds.
Work involved deducing the relationships between chemical structure and thermal properties in liquid crystalline polymers. Polyacrylates with various mesogenic pendants synthesized and processed with a goal of optimizing melt viscosity and solid phase optical properties, U.S. patent 5,332,522.
●Reactions and reagents
Ether formation (ROR,ArOR, ArOAr), Esterification (elimination of water, carbodiimide, Misunobu, …), transesterification to make high molecular weight polymer, C-C coupling (many Pd(0)/Ni(0) catalysis, boronate, stannate), alkyne-alkyne coupling (oligomer, small molecule), substitution of thioacetate for halide, ring closure to make ethylenedioxythiophene and oxadiazoles, cyanide substitution, diazoitization, ozonolysis, poly(etheretherketone), poly(ester), trifilates (from phenols and alkanols, as halide-equivalent leaving group), protection and deprotection (THP, various trialkyl silyl, ketal, benzyl, disulfide, etc.), aromatic halogenation, hydrides (lithium aluminum, sodium boro, sodiumcyanoboro), enzymatic reaction on carbohydrates, etc.
Column chromatography (gravity, pressure, and automated), preparative TLC and HPLC, recrystallization, distillation (atmospheric and vacuum), sublimation, UV reactor, air free reactions
50 mg – 3 kg of final product or intermediate
2-10 reactions in linear sequence, original arrangements of known reactions
●Analytical instrumentation, process equipment
NMR (proton and carbon), GC (MS, FID), HPLC, Viscometer (Ubbelhode, Brookfield), DSC, TGA, Karl Fisher, extruder, polymer grinders, 10-50 gallon reactor
Liquid crystals (polymer and low molar mass), conducting polymers, pervaporation membranes, solvent resistant high temperature polymers, nanowires, biopolymers, hot-melt adhesives.
“Thermotropic Chiral Nematic Liquid Crystalline Polymers,” with S. H. Chen et al, U.S. Patent number 5,332,522 July 26, 1994.
1.J. C. Mastrangelo and S. H. Chen, “New Thermotropic Chiral Nematic Polymers. 3. Copolymers Containing Cyanobiphenyl Group and (S)- -1-Phenylethanol or (S)- -1- Phenylethylamine,” Macromolecules 26, 6132 (1993).
2.J. C. Mastrangelo, T. N. Blanton, and S. H. Chen, “Crystallization upon Thermal Annealing of a Glass-Forming Liquid Crystal in the Nematic Regime,” Appl. Phys. Lett. 66, 2212 (1995).
3.J. C. Mastrangelo, S. H. Chen, and T. N. Blanton, “Glass-Forming Ability and Morphological Stability of Cyclohexane and Bicyclooctene Rings Containing Disperse Red 1,” Chem. Mater. 7, 1904 (1995).
4.S. H. Chen, J. C. Mastrangelo, H. Shi, A. Bashir-Hashemi, J. Li, and N. Gelber, “Novel Glass-Forming Organic Materials. 1. Adamantane with Pendant Cholesteryl, Disperse Red 1, and Nematogenic Groups,” Macromolecules 28, 7775 (1995).
5.S. H. Chen, H. Shi, J. C. Mastrangelo, and T. N. Blanton,” Design, Synthesis, and Stability of Organic Glasses for Advanced Optical Applications,” Polymer Preprints 36(2), 43 (1995).
6.S. H. Chen, J. C. Mastrangelo, T. N. Blanton, and A. Bashir-Hashemi, “Novel Glass-Forming Liquid Crystals. IV. Effects of Central Core and Pendant Group on Vitrification and Morphological Stability,” Liquid Crystals 21, 683 (1996).
7.J. C. Mastrangelo, S. H. Chen, T. Blanton, and A. Bashir-Hashemi, “Vitrification and Morphological Stability of Liquid Crystals,” Mat. Res. Soc. Symp. Proc. 425, 19 (1996).
8.T. Tsutsui, C. P. Lin, S. Saito, S. H. Chen, H. Shi, and J. C. Mastrangelo, “Use of Glass-Forming Liquid Crystalline Materials for Electroluminescent Diodes,” Mat. Res. Soc. Symp. Proc. 425, 225 (1996).
9.C. P. Lin, T. Tsutsui, S. Saito, S. H. Chen, J. C. Mastrangelo, and H. Shi, “Electroluminescent Diodes using Cyclohexane-Based Glass-Forming Liquid Crystals and Their Analogues,” Mat. Res. Soc. Symp. Proc. 425, 233 (1996).
10.S. H. Chen, H. Shi, B. M. Conger, D. Katsis, and J. C. Mastrangelo, "Novel Vitrified Liquid Crystals and Potential Applications, Mat. Res. Soc. Symp. Proc. 425, 13 (1996).
11.S. H. Chen, H. Shi, B. M. Conger, J. C. Mastrangelo, and T. Tsutsui, "Novel Vitrifiable Liquid Crystals as Optical Materials," Adv. Mater. 8, 998 (1996).
12.S. H. Chen, H. Shi, J. C. Mastrangelo, and J. J. Ou, “Thermotropic Chiral Nematic Side- Chain Polymers and Cyclic Oligomers,” Progress in Polymer Sci. 21, 1211 (1996).
13.J. C. Mastrangelo, B. M. Conger, S. H. Chen, and A. Bashir-Hashemi, “Novel Glass- Forming Organic Materials. 2. Structure and Fluorescence of Pyrene- and Carbazole- Containing Cyclohexane, Bicyclooctene, and Adamantane,” Chem. Mater 9, 227 (1997).
14.S. H. Chen, J. C. Mastrangelo, T. N. Blanton, and A. Bashir-Hashemi, "Novel Glass- Forming Organic Materials. 3. Cubane with Pendant Nematogens, Carbazole, and Disperse Red 1," Macromolecules 30, 93 (1997).
15.B. M. Conger, J. C. Mastrangelo, and S. H. Chen, "Fluorescence Behavior of Low Molar Mass and Polymer Liquid Crystals in Ordered Solid Films," Macromolecules 30, 4049 (1997).
16.S. H. Chen, J. C. Mastrangelo, B. M. Conger, A. S. Kende, and K. L. Marshall, "Synthesis and Characterization of Thermotropic Chiral-Nematic Polythiophenes," Macromolecules 31, 3391 (1998).
17.J. C. Mastrangelo, B. M. Conger, S. H. Chen, and A. S. Kende, "Mesomorphic Conjugated Polymers," Polymer Preprints 39 (2), 1026 (1998).
18.S. H. Chen, B. M. Conger, J. C. Mastrangelo, A. S. Kende, and D. U. Kim, "Synthesis and Optical Properties of Thermotropic Liquid Crystalline Polythiophene and Poly(p-phenylene) Derivatives," Macromolecules 31, 8051 (1998).
19.B. M. Conger, D. Katsis, J. C. Mastrangelo, and S. H. Chen, "Fluorescence of Pyrenyl and Carbazolyl Derivatives in Liquid Solution and Solid Film," J. Phys. Chem. A 102, 9213 (1998).
20.S. H. Chen, D. Katsis, J. C. Mastrangelo, A. W. Schmid, T. Tsutsui, and T. N. Blanton, "Circularly Polarized Light Generated by Photoexcitation of Luminophores in Vitrified Liquid-Crystal Films," Nature 397, 506 (1999).
21.D. Katsis, P. H. Chen, J. C. Mastrangelo, S. H. Chen, and T. N. Blanton, "Vitrified Chiral-Nematic Liquid Crystalline Films for Selective Reflection and Circular Polarization," Chem. Mater. 11, 1590 (1999).
22.S. H. Chen, J. C. Mastrangelo, and R. J. Jin, "Glassy Liquid-Crystal Films as Broadband Polarizers and Reflectors via Spatially Modulated Photoracemization," Adv. Mater. (in press).
23.S. H. Chen, D. Katsis, P. H. Chen, J. C. Mastrangelo, and T. Tsutsui, “Circularly Polarized Light Produced with Glassy Liquid-Crystal Films,” Polymer Preprints 40 (2), xxx (1999).
24.S. H. Chen, R. J. Jin, D. Katsis, J. C. Mastrangelo, S. Papernov, and A. W. Schmid, “Photoracemization Broadens Selective Reflection and Polarization Band of Glassy Chiral-Nematic Films,” Liquid Crystals (submitted).
25.B. D. Martin, E.R. Welsh, J. C. Mastrangelo, R. Aggarwal, “General O-Glycolation of 2-Furfuryl Alcohol Using b-Glucuronidase”, Biotechnology And Bioengineering, Vol. 80, No. 2, 2002, 222-227.
26.J. Naciri, J. Mastrangelo, C. H. Patterson, S. E. Koh, S. K. Pollack, C. S. Dulcey, R. Shashidhar, J. G. Kushmerick, “Sequential Deprotection for Control of Orientation in the Self-Assembly of Asymmetric Molecules for Molecular Electronic Devices”, Langmuir, 2004, 20(5), 1838-42.
27.B. D. Martin, C. H. Patterson, J. C. Mastrangelo, R. Aggarwal
“Chemoenzymatic Synthesis and Characterization of Glycosylated Poly(3,4 Ethylenedioxythiophene)" to be submitted to Synthetic Metals by 30 Sept 03.
28.Y. H. Ha., N. Nikolov, S. C Wang, B. Martin, S. Pollack, J. Mastrangelo, C. Dulcey, R. Shashidhar, “Conductivity tuning of poly(3,4-ethylenedioxythiophene) through side-group cleavage ”, Synthetic Metals, 144, 1(8) 2004, 101-105.
29.Y.H. Ha, N. Nikolov, S. K. Pollack, J. Mastrangelo, B. Martin, R. Shashidhar "Towards a Transparent, Highly Conductive Poly(3,4-ethylenedioxythiophene), in preparation for Chemistry of Materials