G. Wunsch

Bio: G. Wunsch is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Rapid Methods for Quality Control of Gun Propellants

Abstract: Several single-base, double-base, and triple-base gun propellants were analyzed by three different methods: Conventional analytical methods (TL 1376–600) High-pressure liquid chromatography (HPLC) Derivative spectroscopy. The results obtained by these methods agree well and show a good reproducibility. However, compared with each other, the chromatographic methods are not only more rapid and more flexible than the conventional wet chemical analysis, they enable a quantitative determination of blasting oil mixtures like nitroglycerin or diglycoldinitrate. The same holds for many other explosives, stabilizers and stabilizer reaction products.

Phthalic Acid Esters

Abstract: The twentieth century can as properly be called the age of organic chemistry as it can the atomic age. The dramatic increase in the production of synthetic fibers, processed foods, pesticides, plastics, pharmaceuticals, and a thousand other materials has completely altered our immediate human environment and provided a wealth of new materials. But it has also transformed our natural environment both intentionally and unintentionally.

Determination of the Decomposition Behavior of Double‐Base Propellants at Low Temperatures

Abstract: Thermal and mechanical stability are very important characteristics of energetic materials used as ingredients of propellants compositions. For the determination of the thermal decomposition behavior of solid double base propellants, usually gravimetric, calorimetric, and chemical methods are being employed. At ICT, the decreasing rates of stabilizers determined by high-performance chromatography at different temperatures are successfully used as a mean to forecast the chemical life time of propellants containing nitric esters. On the other hand, the mechanical properties are evaluated by measuring the tensile strength with a more or less accuracy. In the last years, the increasing performance of the gel-permeation chromatography enabled the determination of the molecular weight and the molecular weight distribution of nitrocellulose in different propellants. In this connection a linear relationship between temperature and depolymerization rate was obtained. This relationship corresponds fairly well with the stabilizer depletion rate and the drop in the mechanical properties.

Determination of Diphenylamine and its Mono-Derivatives in Single-Base Gun Propellants During Aging by High Performance Liquid Chromatography

Abstract: The separation and quantitative determination of diphenylamine and its mono-derivatives in single-base gun propellants during aging was investigated by High Performance Liquid Chromatography (HPLC). We have defined optimal conditions to allow determination of diphenylamine and its mono-derivatives during aging until their levels fell below limits of detection.

Low hazard small-scale synthesis and chemical analysis of high purity nitroglycerine (NG)

Abstract: A previously reported two-phase (99.5% fuming nitric acid/dichloromethane) batch method to prepare high purity 1,2,3-propanetriyl trinitrate (nitroglycerine, NG) was evaluated, simplified and adapted specifically for low hazard small-scale synthesis. The purity of the product, as determined by NMR spectroscopy, HPLC and IR spectroscopic analysis was found to be greater than 99%. The quick synthetic method is highly recommended when small amounts of highly pure NG are required for analytical and related purposes in the absence of a microreactor.

Capillary gas chromatography of double-base propellants

Abstract: The separation and quantitative determination of propellant constituents on short, wide-bore fused-silica capillary columns, coated with crosslinked methylsilicone phase was investigated. The analytical results were quite satisfactory.