The Development of Elastomer Rheological Processability Quality Control Instruments

1993 ◽  
Vol 66 (3) ◽  
pp. 435-454 ◽  
Author(s):  
James L. White ◽  
Istvan Soos

Abstract We have surveyed the development of processability measurements from its origins, about 1920, to the present. We have followed the factors—technology, scientific, and political—which have caused its evolutions. The earliest instruments the capillary and compression rheometer, are still with us. As early as the mid 1930s, different traditions developed in the United States and Germany, differences which continue to the present day. These were accentuated by the development of synthetic rubber and World War II. The Germany industry used the Defo compression instrument and the Americans decided on the Mooney shearing disc viscometer. The early postwar period saw a temporary withdrawal of German activity and an American interest in stress relaxation measurements with a biconical stress relaxation instrument being made semi-commercial by B. F. Goodrich in the 1970s. B. F. Goodrich has continued to improve this instrument over the past generation. The post-1975 period has also seen increased activity in Germany; Bayer AG(i) redesigned the Defo instrument and had it commercialized by Haake and (ii) devised a Mooney post-shearing stress relaxation measurement which has been commercially developed by Monsanto. A pressure-controlled rotational rheometer has been developed by Avon Rubber which allows for better study and characterization of slip. The development of instruments has been coupled with growing knowledge of the rheological properties of gum elastomers and carbon black compounds.

2019 ◽  
Vol 35 (2) ◽  
pp. 231-254
Author(s):  
Andreu Espasa

De forma un tanto paradójica, a finales de los años treinta, las relaciones entre México y Estados Unidos sufrieron uno de los momentos de máxima tensión, para pasar, a continuación, a experimentar una notable mejoría, alcanzando el cénit en la alianza política y militar sellada durante la Segunda Guerra Mundial. El episodio catalizador de la tensión y posterior reconciliación fue, sin duda, el conflicto diplomático planteado tras la nacionalización petrolera de 1938. De entre los factores que propiciaron la solución pacífica y negociada al conflicto petrolero, el presente artículo se centra en analizar dos fenómenos del momento. En primer lugar, siguiendo un orden de relevancia, se examina el papel que tuvo la Guerra Civil Española. Aunque las posturas de ambos gobiernos ante el conflicto español fueron sustancialmente distintas, las interpretaciones y las lecciones sobre sus posibles consecuencias permitieron un mayor entendimiento entre los dos países vecinos. En segundo lugar, también se analizarán las afinidades ideológicas entre el New Deal y el cardenismo en el contexto de la crisis mundial económica y política de los años treinta, con el fin de entender su papel lubricante en las relaciones bilaterales de la época. Somewhat paradoxically, at the end of the 1930s, the relationship between Mexico and the United States experienced one of its tensest moments, after which it dramatically improved, reaching its zenith in the political and military alliance cemented during World War II. The catalyst for this tension and subsequent reconciliation was, without doubt, the diplomatic conflict that arose after the oil nationalization of 1938. Of the various factors that led to a peaceful negotiated solution to the oil conflict, this article focuses on analyzing two phenomena. Firstly—in order of importance—this article examines the role that the Spanish Civil War played. Although the positions of both governments in relation to the Spanish war were significantly different, the interpretations and lessons concerning potential consequences enabled a greater understanding between the two neighboring countries. Secondly, this article also analyzes the ideological affinities between the New Deal and Cardenismo in the context of the global economic and political crisis of the thirties, seeking to understand their role in facilitating bilateral relations during that period.


2019 ◽  
Vol 8 (1) ◽  
pp. 52-99 ◽  
Author(s):  
Linh D. Vu

Abstract Exploring the construction and maintenance of Nationalist Chinese soldiers’ graves overseas, this article sheds light on post-World War II commemorative politics. After having fought for the Allies against Japanese aggression in the China-Burma-India Theater, the Chinese expeditionary troops sporadically received posthumous care from Chinese veterans and diaspora groups. In the Southeast Asia Theater, the Chinese soldiers imprisoned in the Japanese-run camps in Rabaul were denied burial in the Allied war cemetery and recognition as military heroes. Analyzing archival documents from China, Taiwan, Britain, Australia, and the United States, I demonstrate how the afterlife of Chinese servicemen under foreign sovereignties mattered in the making of the modern Chinese state and its international status.


2011 ◽  
Vol 28 (2) ◽  
pp. 151-169 ◽  
Author(s):  
Michael A. Rynkiewich

Abstract There was a time when mission studies benefitted from a symbiotic relationship with the social sciences. However, it appears that relationship has stagnated and now is waning. The argument is made here, in the case of cultural anthropology both in Europe and the United States, that a once mutually beneficial though sometimes strained relationship has suffered a parting of the ways in recent decades. First, the article reviews the relationships between missionaries and anthropologists before World War II when it was possible to be a ‘missionary anthropologist’ with a foot in both disciplines. In that period, the conversation went two ways with missionary anthropologists making important contributions to anthropology. Then, the article reviews some aspects of the development of the two disciplines after World War II when increasing professionalism in both disciplines and a postmodern turn in anthropology took the disciplines in different directions. Finally, the article asks whether or not the conversation, and thus the cross-fertilization, can be restarted, especially since the youngest generation of anthropologists has recognized the reality of local Christianities in their fields of study.


1968 ◽  
Vol 20 (2) ◽  
pp. 279-300 ◽  
Author(s):  
Klaus Epstein

Schwarz's study Vom Reich zur Bundesrepublik is, in the opinion of this reviewer, the single most important book on the occupation studyperiod in Germany after World War II that has yet appeared. It is not an ordinary narrative history—indeed, it presupposes a good deal of prior knowledge—but is rather a topical analysis of the following problems: the various possible solutions to the German question in the years after 1945; the policies toward Germany of the four victorious powers—Russia, France, Britain, and the United States; the development of German attitudes on the future political orientation of one or two Germanies; and finally, the factors that led to the voluntary acceptance of Western integration by most West Germans even though this integration meant the partition of Germany.


2005 ◽  
Vol 15 (1) ◽  
pp. 107-144 ◽  
Author(s):  
David P. Setran

AbstractIn the years between World War I and World War II in the United States, public and religious educators engaged in an extended struggle to define the appropriate nature of character education for American youth. Within a post-war culture agonizing over the sanctions of moral living in the wake of mass violence and vanishing certitudes, a group of conservative educators sought to shore up traditional values through the construction of morality codes defining the characteristics of the “good American.” At the same time, a group of liberal progressive educators set forth a vigorous critique of these popular character education programs. This article analyzes the nature of this liberal critique by looking at one leading liberal spokesperson, George Albert Coe. Coe taught at Union Theological Seminary and Teachers College, Columbia University, and used his platform in these institutions to forge a model of character education derived from the combined influences of liberal Protestantism and Deweyan progressive education. Coe posited a two-pronged vision for American moral education rooted in the need for both procedural democracy (collaborative moral decision making) and a democratic social order. Utilizing this vision of the “democracy of God,” Coe demonstrated the inadequacies of code-based models, pointing in particular to the anachronism of traditional virtues in a world of social interdependence, the misguided individualism of the virtues, and the indoctrinatory nature of conservative programs. He proposed that youth be allowed to participate in moral experimentation, adopting ideals through scientific testing rather than unthinking allegiance to authoritative commands. Expanding the meaning of morality to include social as well as personal righteousness, he also made character education a vehicle of social justice. In the end, I contend that Coe's democratic model of character education, because of its scientific epistemological hegemony and devaluing of tradition, actually failed to promote a truly democratic character.


1992 ◽  
Vol 52 (1) ◽  
pp. 41-60 ◽  
Author(s):  
Robert Higgs

Relying on standard measures of macroeconomic performance, historians and economists believe that “war prosperity” prevailed in the United States during World War II. This belief is ill-founded, because it does not recognize that the United States had a command economy during the war. From 1942 to 1946 some macroeconomic performance measures are statistically inaccurate; others are conceptually inappropriate. A better grounded interpretation is that during the war the economy was a huge arsenal in which the well-being of consumers deteriorated. After the war genuine prosperity returned for the first time since 1929.


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