Expert in Polymer Synthesis and Properties, Catalysis, Physical-Organic Chemistry, and Molecular Modeling
Expert was a lead chemist in the development and commercialization of polytrimethylene terephthalate (PTT, also known as polypropylene terephthalate and Corterra ™ polymers) and is one of the top experts on PTT polyester synthesis and chemistry. His research contributions helped define the first world-scale continuous, all-melt PTT plant starting up in 2004. He has extensive experience in pilot scale production of PTT and solid-state polymerizations. His research also identified the mechanisms of thermal and oxidative degradations of PTT, which led to stabilized proprietary compositions. He is also familiar with many aspects of PET and PBT chemistry. His contributions to PTT process chemistry development and numerous patents in this field were recognized by him being chosen the 2003 Texas Inventor of the Year and a co-recipient of the American Chemical Society's Team Innovation Award in 2000. In addition, Expert discovered a new family of polyester copolymers based on cyclobutanediol monomers, which exhibit both good thermal properties (glass transition >100 degrees C) and unusually high, even ultra-high, impact resistance rivaling polycarbonates. This copolyester technology is currently under development at Texas State University, San Marcos.
Expert was lead scientist for several years on developing ring-opening metathesis polymers (ROMP), including discovering several novel in situ catalyst systems for polymerization of dicyclopentadiene (polyDCPD) and new compositions based on cyclohexenenorbornene monomers. His research in this area also resulted in new rubber-modified compositions using various Kraton ™ styrene-butadiene and styrene-isoprene block copolymers to improve impact properties. He is familiar with reaction injection molding (RIM) concepts used for manufacture of polyDCPD. His contributions led to several U.S. patents and publications on ROMP polymers and catalysts.
Expert’s research has dealt extensively with development, modification and improvement of polymerization catalysts, which are a significant portion of his inventions and patents. His research includes catalysts used in polyester synthesis (PET, PBT, PTT), the discovery of several in situ catalysts systems for ring-opening metathesis polymerizations (ROMP), particularly procatalysts based on tungsten, and discovery of several catalysts for aromatic polyether processes. Expert is also familiar with nickel-catalyzed aromatic coupling reactions to form biaryls using aryl chlorides and bromides and published a paper on the mechanism of this reaction. He is also generally familiar with many types of polymerization catalysts, e.g. metallocenes, and homogeneous catalysts used in industrial chemical processes.
Expert was involved for several years in the development of high-performance engineering polymers, particularly the process chemistry to make polyarylethers, such as polyaryletherketones (e.g. PEEK) and polysulfones. These processes involve intimate knowledge of nucleophilic displacement chemistry of aryl chlorides and fluorides. He developed improved catalysts and a novel strategy to prepare highly crystalline polyether ketones via amorphous precursors made from novel ketal-modified monomers (published). His research in this area contributed to many U.S. patents and commercialization. He is also generally familiar with the chemistry and properties of other engineering resins, such as polyarylates, polyethersulfones, and polyetherimides.
Although Expert’s research has focused on polymer chemistry and synthesis, he is very familiar with and understands basic polymer mechanical and physical properties for a wide range of polymers and is familiar with the common test methods. These include intrinsic viscosity, melt flow, Izod impact, modulus, tensile properties, glass transition temperature, differential scanning calorimetry, gravimetric analysis, Instron tests, and the like. He is also familiar with modern analytical techniques used to characterize polymers, monomers, and byproducts, such as gas chromatography (GC), mass spectroscopy (MS), GC-MS, nuclear magnetic resonance spectroscopy (NMR) and paramagnetic shift reagents, high pressure liquid chromatography (HPLC), infrared spectroscopy, and the like.
Expert's doctorate degree was in the field of physical organic chemistry at one of the premier U.S. universities. His interest in understanding organic and organometallic reaction mechanisms has been one of the underlying themes of his research in polymer chemistry and catalysis. He has investigated, for example, the mechanisms of nickel-catalyzed coupling reactions, the thermal decomposition of polyesters, nucleophilic displacement chemistry, and reaction kinetics for several systems.
Expert is adept at applying molecular modeling computational approaches and techniques to understanding practical chemical problems. Early in his career, he published several papers on orbital mapping techniques for analyzing thermal concerted electrocyclic reactions. More recently, for example, he has used the ChemCAChe suite of semi-empirical molecular orbital programs (e.g. Mopac, AM1, PM3, etc.) to understand the chemistry of polyesters, including the thermodynamics of cyclic dimer formation and the thermal stability of PTT, PET, and PBT.
Expert is currently assisting a company and university who are developing the ultra high impact copolyesters that he invented.
Expert may consult nationally and internationally, and is also local to the following cities: San Jose, California - San Francisco, California - Sacramento, California - Oakland, California - Stockton, California - Fremont, California - Santa Rosa, California - Hayward, California - Sunnyvale, California - Concord, California
|Year: 1973||Degree: Ph.D.||Subject: Physical Organic Chemistry||Institution: California Institute of Technology|
|Year: 1968||Degree: B.S.||Subject: Chemistry and Mathematics||Institution: Central Missouri State University|
|Years: 1987 to 2004||Employer: Shell Chemicals LP||Title: Staff Research Chemist||Department: Corterra(TM) Polymers||Responsibilities: Expert was the principal company technical investigator for developing the process chemistry and formulations for commercial scale production of poly(trimethylene terephthalate) polyester [PTT], which is the company's new Corterra ™ polyester for carpet and textile fibers. He discovered a new family of ultra-high impact polyester copolymers. He has also studied the degradation mechanisms of polyesters. He was lead scientist for development of new ring-opening metathesis [ROMP] polymers, monomers and catalysts. He initiated new ideas and exploratory projects in the New Chemical Product Development group, including exploring high-throughput screening technology ("combichem") and applying computational molecular modeling techniques for understanding polymer chemistry and reaction mechanisms. He managed Shell-sponsored research at universities and helped manage intellectual property assets. He is an inventor on 56 U.S. patents during his career so far.|
|Years: 1986 to 1987||Employer: Amoco Performance Products||Title: Senior Research Scientist||Department:||Responsibilities: He continued his research on high-performance engineering condensation polymers begun at Union Carbide.|
|Years: 1974 to 1986||Employer: Union Carbide Corp.||Title: Senior Research Scientist||Department: Engineering Polymers||Responsibilities: Expert conducted exploratory research on high-performance polymers (and also led a small research group) that developed nickel-catalyzed coupling routes to aromatic polymers, developed new processes and catalysts for synthesis and scale-up of polyarylethers, polyetherketones and polysulfones, and developed new engineering polymer compositions. His research on condensation polymerizations involved examination of the reaction mechanisms of nucleophilic displacement chemistry. He also published several papers on computational chemistry using his orbital topology theory.|
|Years: 1972 to 1974||Employer: Yale Univerisity||Title: Postdoctoral Research Fellow||Department: Chemistry||Responsibilities: He conducted research on trimethylene methane intermediates in collaboration with Professor Jerome Berson.|
|Years||Country / Region||Summary|
|Years: 1999 to 2002||Country / Region: Germany||Summary: Expert has conducted pilot plant studies in collaboration with research partners on several occasions during 1999-2002.|
|Associations / Societies|
|Expert is a member of the American Chemical Society.|
|Awards / Recognition|
|He was co-recipient of the prestigious national American Chemical Society Award for Team Innovation in 2000 for his contribution to the development of Corterra ™ polymers. In 2003, he was named Texas Inventor of the Year by the Intellectual Law division of the State Bar of Texas. He was honored with the Distinguished Alumnus Award by Central Missouri State University in 1996. He has been chosen to appear in "American Men & Women of Science," 20th ed., 1998-99, and "Who's Who in America," 58th ed. 2004.|
|Publications and Patents Summary|
|Expert is the inventor or co-inventor on 56 U.S. patents and numerous foreign patents, primarily concerning polymer compositions, processes, additives and catalysts. He has 17 publications on polymers, physical organic chemistry, and theoretical chemistry. His patents and publications have been cited over 500 times in the chemical literature.|
|Training / Seminars|
|Expert has developed and presented training seminars on polyester chemistry. He has also presented numerous chemistry papers at national and international conferences.|
|Other Relevant Experience|
|Expert has working knowledge of the ChemCAChe molecular modeling program, which he has applied to several practical chemistry problems. He has used factorial experimental design (JMP) extensively in his research projects.|
|German||Expert reads a little German.|