Pyromellitic dianhydride - Wikipedia
网页Pyromellitic dianhydride (PMDA) is an organic compound with the formula C 6 H 2 (C 2 O 3) 2. It is the double carboxylic acid anhydride that is used in the preparation of polyimide polymers such as Kapton. It is a white, hygroscopic solid. It forms a hydrate.
Pyromellitic dianhydride - NIST Chemistry WebBook
网页Pyromellitic dianhydride. Formula: C 10 H 2 O 6. Molecular weight: 218.1193. IUPAC Standard InChI:InChI=1S/C10H2O6/c11-7-3-1-4-6 (10 (14)16-8 (4)12)2-5 (3)9 (13)15-7/h1-2H Copy. IUPAC Standard InChIKey:ANSXAPJVJOKRDJ-UHFFFAOYSA-N Copy. CAS Registry Number: 89-32-7.
Pyromellitic dianhydride 97 89-32-7 - MilliporeSigma
网页Pyromellitic dianhydride (PMDA) is an acidic anhydride that can be used as a repair agent and as a chain extender in the formation of polyethylene terephthalate (PET) based chain extensions. It is mainly used in the production of thermoplastics and …
Pyromellitic dianhydride, 97%, Thermo Scientific Chemicals
网页Pyromellitic dianhydride is used as a monomer in the preparation of polyimide polymers such as kapton; thermoplastics such as polyesters, polyethers, plasticizers, and expoxy resins. It is involved in the preparation of high performance coatings due to its mechanical, thermal and oxidative stability properties.
Synthesis and characterization of pyromellitic dianhydride ...
网页2021年12月22日 · The formation of sulfonated polyimides synthesized using pyromellitic dianhydride (PMDA) and diamine-bearing sulfonic acid groups was well confirmed by spectroscopic methods. The polyamide structure was calculated with a 6–311 G basis set of the DFT/B3LYP method.
Organic acid anhydride - Wikipedia
网页Illustrative acid anhydrides. Acetic anhydride is produced on a large scale for many applications. Naphthalenetetracarboxylic dianhydride, a building block for complex organic compounds, is an example of a dianhydride. Maleic anhydride is a cyclic anhydride, widely used to make industrial coatings.
Pyromellitic dianhydride | C10H2O6 | CID 6966 - PubChem
网页Pyromellitic dianhydride is a hygroscopic substance that undergoes hydrolysis when contacted by moisture in the atmosphere resulting in the formation of pyromellitic acid(4). Unreacted particulate-phase pyromellitic dianhydride may be removed from the air by wet and dry deposition(SRC).