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Solid Polymer Electrolytes, which are made by connecting or depositing electrodes (usually noble metal) to both sides of the membrane, conduct the electrons through an energy requiring process and rejoin the hydrogen ions to react with oxygen and produce water. [3] Fuel cells are expected to find strong use in the transportation industry.
Artificial polymer: Man-made polymer that is not a biopolymer. Note 1: Artificial polymer should also be used in the case of chemically modified biopolymers. Note 2: Biochemists are now capable of synthesizing copies of biopolymers that should be named Synthetic biopolymer to make a distinction with true biopolymers.
Thiokol was an American corporation concerned initially with rubber and related chemicals, and later with rocket and missile propulsion systems. Its name is a portmanteau of the Greek words for sulfur (Greek: θεῖον, romanized: theion) and glue (Greek: κόλλα, romanized: kolla), an allusion to the company's initial product, Thiokol polymer.
The SNF Group comprises subsidiaries and joint ventures in over 70 countries and operates 21 production sites in Europe, Americas, Asia and Australia. Its headquarters is located in Andrézieux, France. SNF has customers in over 130 countries and supplies products to a wide variety of industries. SNF is one of the major chemical companies in ...
Phenyl ether polymers are a class of polymers that contain a phenoxy or a thiophenoxy group as the repeating group in ether linkages. Commercial phenyl ether polymers belong to two chemical classes: polyphenyl ethers (PPEs) and polyphenylene oxides (PPOs). The phenoxy groups in the former class of polymers do not contain any substituents ...
LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]
Foams consist of a liquid or solid through which a gas has been dispersed to form cavities. This structure imparts a large surface-area-to-volume ratio on the system. [ 23 ] [ 32 ] Foams have found applications in insulation and textiles , [ 32 ] and are undergoing active research in the biomedical field of drug delivery and tissue engineering ...
Fragment of the solid-state structure of Na 2 S 5. The S 2− 5 chain consists of the yellow-colored atoms. [3] The alkali metal polysulfides arise by treatment of a solution of the sulfide with elemental sulfur, e.g. sodium sulfide to sodium polysulfide: S 2− + n S → S 2− n+1