DuPont continued

DuPont continued their leadership role in synthetic fibers by commercializing acrylic fibers (Orion) in 1950. They did a repeat performance in 1-953 with a polyester called Dacron. The big four fibers—Nylon 6, Nylon 66, acrylics, and polyester—now account for most of the synthetic production and about half of the fiber production of all kinds, including cotton, silk, and wool. 

In 2002, DuPont celebrated its 200th anniversary. Its past 100 years were marked by its transformation from a company known for its explosives to a diversified chemical company. Today, DuPont is in the midst of another remake, into an integrated science company. It realizes that only by aligning itself with society s needs can a corporation like DuPont continues its successes into its next century. 

The year before DuPont continued to expand its long-established product... 

Scouting at DuPont continued for a brief period, during which Dr. Lawrence A. Cescon saw a reference to Japanese work that described photochromic behavior of certain oxidation products of triarylimidazoles (lophines). Soon other laboratories in Japan, Germany, England and the United States embarked on studies of these materials. 

Throughout the 1930s TEL proved itself a profitable product for DuPont, which remained virtually the only TEL producer into the post-World War II period. With no advantage to be gained in further collaboration, DuPont severed its ties with Ethyl Corp. in 1948 and continued to manufacture TEL independently. 

Conan DuPont s trade-name for their mineral filled acrylic continuous cast sheet material. This wear resistant and attractive material is used for consumer s kitchen counter... 

In 1930, DuPont launched the synthetic fiber industry with the discovery of nylon-6,6.2 In 1938, a pilot plant for nylon-6,6 production was put into operation, and in 1939, production was commenced at a large-scale plant in Seaford, Delaware. The classical method for the synthesis of nylon-6,6 involves a two-step process. In the first step, hexamethylene diamine (HMDA) is reacted with adipic acid (AA) to form a nylon salt. Polymerization of the aqueous salt solution is carried out at temperatures in the range of about 210-275°C at a steam pressure of about 1.7 MPa. When 275°C is reached, the pressure is reduced to atmospheric pressure and heating is continued to drive the reaction to completion. 

My coworkers and I feel deeply lucky and indebted to have met then Dr. Fritz Kalhammer from EPRI. Not only was EPRI s financial support significant for strengthening our NEMCA work in Patras, but most importantly, Dr. F. Kalhammer, a former student of G.M. Schwab, understood and described NEMCA as deeply, eloquently and concisely as nobody, in my opinion, had ever done before. Fritz s continuing support and friendship is gratefully acknowledged, as is that of Dr. H. Putter of BASF, another prominent electrochemist whose continuing collaboration is most valuable, as is BASF s, Dupont s and EU s continuing financial support. 

Fig. 1. Comparative effectiveness of treatment of patients with travelers diarrhea. Percentage of subjects who continued to have diarrhea by hour after treatment in subjects receiving one of three doses of rifaximin compared with two similar placebo-treated groups studied earlier using identical study methods (from DuPont et al. [13]).

The author s work in the area of CFD analysis of chemical reactors has been supported nearly continuously for the last 15 years by the U.S. National Science Foundation. The work on gas-solid multiphase flows and population balances was funded by the U.S. Department of Energy. The author would also like to acknowledge support from several companies, including Air Products and Chemicals, BASF, BASELL, BP Chemicals, Dow Chemical, DuPont Engineering, and Univation Technologies. Last, but not least, the author wishes to acknowledge his many collaborators over the years who are many in number to name them individually. 

DuPont s perspective on membrane development will be outlined. The expansion of the facilities at the Nafion Customer Service Laboratory will also be described. This expansion has been undertaken in support of DuPont s commitment to increase the understanding of chlor-alkali technology and ensure continuous improvement of DuPont s membranes. 

In its support of the commitment to increase the understanding of chlor-alkali technology and to continuously improve its membranes, DuPont has expanded its CSL (Customer Service Laboratory) facilities at Fayetteville, North Carolina in the United States. 

Project (by Sarnoff Corp with DuPont de Nemours and Co Central Research and Development) to print organic transistors on plastic for electronic displays and circuits. The goal is to develop materials, thin flexible plastic substrates, and methods for continuous high-resolution printing. 

Up to this point, it was considered that universities were where discoveries were made and industry was where they were put to some practical use. This separation between basic and applied work was quite prominent at this juncture and continues in many areas even today in some fields of work though the difference has decreased. But in polymers, most of the basic research was done in industry, having as its inception the decision by DuPont to bridge this unnatural gap between fundamental knowledge and application. In truth, they can be considered as the two hands of an individual, and in order to do manual work both hands are important. 

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