Patrick Joseph Mccloskey
General Electric
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Publication
Featured researches published by Patrick Joseph Mccloskey.
Synthetic Communications | 1993
James Paul Barren; Sunita Singh Baghel; Patrick Joseph Mccloskey
Abstract A practical method has been found for the reduction of PCBs and chlorinated benzenes in a nonpolar solvent with formic acid, water, Pd/C and sodium carbonate. This reductive dechlorination can be run under atmospheric pressure and relatively mild conditions.
Journal of Analytical Atomic Spectrometry | 2004
Antoaneta P. Krushevska; June Klimash; Joanne F. Smith; Elizabeth A. Williams; Patrick Joseph Mccloskey; V. Ravikumar
Phosphorus in different forms is used in a variety of applications (catalysts, thermal stabilizers, flame retardants) in polymeric formulations. It is important to be able to determine its concentration in raw materials, intermediates and final products. The challenge of measuring low concentrations of P, combined with the volatility of the organic phosphorus compounds, has been solved through a novel analytical procedure with a method detection limit of 0.4 µg g−1 P (10σ). The volatilization of organic P compounds was prevented by pre-oxidation with periodic acid, which allows ashing in the presence of magnesium acetate while maximizing the weight to final volume ratio. Using factorial design of experiments, experimental factors including ashing temperature, time, and the amount of the reagents were optimized with respect to accuracy and precision of the technique. The influence of Ti when present in the samples was eliminated by complexing it with H2O2. Additional pre-treatment with NH4OH was found to improve recovery for some reactive samples. Comparison with other established methods was carried out and is discussed.
Polymer Chemistry | 2016
Jan Henk Kamps; Theodorus Lambertus Hoeks; Edward Kung; Jan Pleun Lens; Patrick Joseph Mccloskey; Bart A. J. Noordover; Johan P. A. Heuts
Activated carbonates facilitate the preparation of polycarbonates based on monomers that are unsuitable for traditional melt polymerization at high temperatures. Bis(methyl salicyl) carbonate (BMSC) clearly shows reactivity benefits over diphenyl carbonate in melt polymerization reactions, resulting in shorter reaction times and reduced heat exposure during polymerization. The increased reactivity enables the melt polymerization of a wide range of monomers, as demonstrated by two examples using volatile resorcinol and sterically hindered tert-butyl hydroquinone as monomers in the preparation of (co)polycarbonates.
Joint International Symposium on Optical Memory and Optical Data Storage | 2011
Eugene Pauling Boden; Kwok Pong Chan; Dmitry V. Dylov; Evgenia Mikhailovna Kim; Peter William Lorraine; Patrick Joseph Mccloskey; Matthew Jeremiah Misner; Arunkumar Natarajan; Victor Petrovich Ostroverkhov; James Edward Pickett; Xiaolei Shi; Yuzuru Takashima; Vicki Herzl Watkins
Advances in micro-holographic materials and systems are presented. New materials show improved index change (10x) and sensitivity (100x) at >3x lower intensity vs. previously reported. Experimental results supporting single-sided optical drive concept is presented.
Archive | 2009
Radislav A. Potyrailo; Ronald James Wroczynski; Patrick Joseph Mccloskey; William G. Morris
In sensor and microfluidic applications, the need is to have an adequate solvent resistance of polymers to prevent degradation of the substrate surface upon deposition of sensor formilations, to prevent contamination of the solvent-containing sensor formulations or contamination of organic liquid reactions in microfluidic channels. Unfortunately, no comprehensive quantitative reference solubility data of unstressed copolymers is available to date. In this study, we evaluate solvent-resistance of several polycarbonate copolymers prepared from the reaction of hydroquinone (HQ), resorcinol (RS), and bisphenol A (BPA). Our high-throughput polymer evaluation approach permitted the construction of detailed solvent-resistance maps, the development of quantitative structure–property relationships for BPA-HQ-RS copolymers and provided new knowledge for the further development of the polymeric sensor and microfluidic components.
Archive | 2002
Patrick Joseph Mccloskey; Warren William Reilly; Brian James Grimmond
Archive | 2002
Norberto Silvi; Patrick Joseph Mccloskey; James Day; Mark Howard Giammattei
Archive | 2001
John Patrick Lemmon; Patrick Joseph Mccloskey; Oltea Puica Siclovan
Archive | 2006
Patrick Joseph Mccloskey; Warren William Reilly; Elliott West Shanklin; Gary William Yeager
Archive | 2004
Patrick Joseph Mccloskey; Norberto Silvi; Alberto Nisoli; Mark Howard Giammattei