Search Results | Hagley Digital Archives

Title: Memorandum on Teflon, 1946-04-10
Date(s): 1946-04-10
Contributor(s): E.I. du Pont de Nemours & Company (originator), Raskob, John J. (John Jakob), 1879-1950 (former owner)
Description: Memo describing chemical and electrical properties, uses, and production.
Collection ID: John J. Raskob papers (Accession 0473)
Hagley ID: m473_20100709_027
Collection: John J. Raskob papers

Title: Lard boiled with hydrochloric acid and 1% of the substances
Date(s): 1887/1913, 1887, 1913
Contributor(s): Litchfield, Carter (collector), Lewkowitsch, J. (Julius), 1857-1913 (former owner)
Collection ID: Carter Litchfield photographs and ephemera on the history of fatty materials (Accession 2007.227)
Hagley ID: 2270151
Collection: Carter Litchfield history of fatty materials collections

Title: Table No. 5: Lard boiled with hydrochloric acid
Date(s): 1887/1913, 1887, 1913
Contributor(s): Litchfield, Carter (collector), Lewkowitsch, J. (Julius), 1857-1913 (former owner)
Description: Heading of table: 'Lard containing free fatty acids, boiled with Hydrochloric Acid and 1% of the Substances.'
Collection ID: Carter Litchfield photographs and ephemera on the history of fatty materials (Accession 2007.227)
Hagley ID: 2270152
Collection: Carter Litchfield history of fatty materials collections

Title: Monoglycerides, diglycerides, triglycerides molecular formulas
Date(s): 1887/1913, 1887, 1913
Contributor(s): Litchfield, Carter (collector), Lewkowitsch, J. (Julius), 1857-1913 (former owner)
Collection ID: Carter Litchfield photographs and ephemera on the history of fatty materials (Accession 2007.227)
Hagley ID: 2270147
Collection: Carter Litchfield history of fatty materials collections

Title: Interview with E.K. Bolton, 1961 September 14 [audio]
Date(s): 1961-09-14
Contributor(s): Bolton, Elmer K. (Elmer Keiser), 1886-1968 (interviewee), Wilkinson, Norman B. (interviewer)
Description: Bolton describes his working career and research in the chemical department, studying organic chemistry in Germany at the Kaiser Wilhelm Institute, and the company during World War I. He also describes various colleagues during his career. He also discusses the state of the industry during his career at DuPont, both in the United States and abroad.
Collection ID: Eleutherian Mills-Hagley Foundation interviews on the history of the DuPont Company Powder Yard (Accession 1970.370)
Hagley ID: 1970370_82713_Bolton
Collection: Oral histories on work and daily life in the Brandywine Valley

Title: Diffusion and Persistence of Silicone Oil in Rubbers and Low Density Polyethylene
Date(s): 1976-03
Contributor(s): Westerdahl, Carolyn A. (Lovejoy), 1935-2016 (author), Picatinny Arsenal (originator)
Description: Introduction : "Silicone release is used extensively in molding polymers. When it is used on the mold it gradually becomes incorporated into the polymers being molded. If the silicone can migrate it can change the bulk properties of the polymers. Even if it does not migrate and remains primarily at or near the surface, it will change surface properties, such as printability, coatability, and bondability. Therefore, it is of interest to know how much silicone remains within the polymer,...
Show moreIntroduction : "Silicone release is used extensively in molding polymers. When it is used on the mold it gradually becomes incorporated into the polymers being molded. If the silicone can migrate it can change the bulk properties of the polymers. Even if it does not migrate and remains primarily at or near the surface, it will change surface properties, such as printability, coatability, and bondability. Therefore, it is of interest to know how much silicone remains within the polymer, whether it migrates and how easy it is to remove." Abstract: "Experiments with a C-14 tagged silicone mold release have given no evidence of its diffusion through polyethylene or the elastomers Buna N, Buna S, butyl, Hypalon, natural, or urethane. Hexane rapidly removed the mold release from rubbers which it did not swell (urethane, Buna N, and Hypalon), Buna S, natural, and butyl rubbers retained a low level of the mold release agent, even after repeated treatment with hexane. This is presumably related to the fact that the latter three rubbers swell in the silicone. Removal of the silicone from polyethylene which has been molded against a surface coated with the mold release proved difficult."
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Collection ID: David Sarnoff Library technical reports (Accession 2009.1214.DS)
Hagley ID: 08219950_diffusion_and_persistence
Collection: David Sarnoff Library technical reports