Mark, Hermann

Band I, Teil 1, Mark, Hermann, Physik und Chemie der Cellulose, 1932. 

Boulhy, Mark, Hermann Hesse his Mind and his Art (Ithaca, NY, 1967)... 

Probably the first to take up this technique for purposes of scientific research was Michael Polanyi (1891-1976) who in 1922-1923, with the metallurgist Erich Schmid (1896-1983) and the polymer scientist-to-be Hermann Mark (1895-1992), studied the plastic deformation of metal crystals, at the Institute of Fibre Chemistry in Berlin-Dahlem in those days, good scientists often earned striking freedom to follow their instincts where they led, irrespective of their nominal specialisms or the stated objective of their place of work. In a splendid autobiographical account of those... 

Instead, we merely ask how did the two corner stones, namely the recognition of the macro or chainmolecule and the notion of chain flexibility evolve What were some of the first applications, based on these concepts An even sketchy consideration of these matters allows us to gage the flavor of the scientific methodology and at the same time, the impact of Hermann Mark s thoughts and work during that period. 

The other approach originated from the physicochemical side, specifically X-ray spectroscopy of semicrystalline systems, in particular cellulose. Hermann Mark concluded that the microbuilding blocks contained but a small number of structural residues and that these were held together at distances corresponding to valence bonds and with forces of the intensity corresponding to valence forces (4). 

Herbert Morawetz, whom Mark hired at Brooklyn Poly in 1951, says that he believes that Mark is incapable of negative emotion, "or at least they are buried beyond retrieval". As an example, it is well known that Hermann Staudinger disliked Mark as a result of the events about the establishment of the macro-molecular concept. His dislike bordered on open contempt, but Mark steadfastly refused to openly criticize Staudinger. In... 

A number of authors have studied the reductive termination step. The classical work by Hermann and Nelson (121) showed that the reduction of the titanium in alkyltitanates occurred readily with the more alkylated species. The same authors (122) showed that the stability of the alkyl metal decreased markedly when the number of alkyls per metal atom increased. This is parallel to increased anionicity of the alkyl. Vanheerden (123) pointed out that the disproportionation of alkyl-titanium was bimolecular. Cotton (124) showed that the coupling occurs when phenyl Grignard reagents are mixed with various transition metal salts. This is through disproportionation or combination of the alkyl radicals. 

Mark, Polanyi s colleague in the Institute for Fiber Chemistry, interested himself in the work on adsorption and its implications for catalysis, later recalling that most organic chemists found Polanyi s theory perfectly satisfactory, but that they were not much interested in electrons or the new physics. Scott, Michael Polanyi s creativity in chemistry, 284 also see Hermann Mark, Recollections of Dahlem and Lud-wigshafen, in Fifty Years of X-Ray Diffraction, 603-607, on 603. 

What Is a Polymer, Anyway Call in the Special Forces Hermann Staudinger and Herman Mark Who s the Fatherf Wallace Carothers and the First Synthetic Fiber From Globs to Fiber Chain-Growth Polymers... 

Hermann Mark (left) with Hermann Staudinger (Source Deutsches Museum). 

There was still more to come, and not only from the big, well-heeled companies and universities. At the University of Arkansas, Allen Hermann, chairman of the physics department, decided to go for a high Tc mark. Co-inventor of a heart pacemaker battery and a jazz trombone player of some note (stints with Ella Fitzgerald and Lionel Hamp-... 

Staudinger, Hermann (1970) From Organic Chemistry to Macromolecules A Scientific Autobiography Based on my Original Papers, translated from the German with a foreword by Mark, Herman F., New York, John Wiiey Sons... 

Kurt H. Meyer and Hermann Mark, Der Aujbau der hochpolymeren organischen Naturstoffe (Leipzig Akademische Verlagsgesellschaft, 1930). 

---