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 .
均苯四甲酸二酐 - 百度百科
网页均苯四甲酸二酐，简称均酐，纯品为白色或微黄色结晶。. 暴露于潮湿空气中会很快吸收空气中的水分而水解成均苯四甲酸。. 溶于二甲基亚砜、二甲基甲酰胺、丙酮等有机溶剂，不溶于乙醚、氯仿和苯。. 主要用作作聚酰亚胺的原料，用于制造环氧树脂的固化消 ...
Understanding the Effect of the Dianhydride Structure on the …
网页2017年11月30日 · In this work we report the effect of the aromatic dianhydride structure on the thermal, optical, and mechanical properties and relaxation behavior of a set of polyimides based on a biobased aliphatic dimer diamine (DD1).
Organic acid anhydride - Wikipedia
网页Organic acid anhydride. Generic example of an anhydride of two carboxylic acids R1COOH and R2COOH, with the blue marked carboxylic acid anhydride functional group, where R stands for any group (typically hydrogen or organyl). An organic acid anhydride is an acid anhydride that is also an organic compound. An acid anhydride is a …
Why Dianhydrides | What Is
网页Dianhydrides are a type of anhydride, a general class of fine chemical intermediate formed by the removal of water from an organic acid. The simplest example includes two acyl groups bound by a common oxygen molecule. A “dianhydride” is a molecule that contains two anhydride groups.
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 …
Journal of Applied Polymer Science | Wiley Online Library
网页2013年4月24日 · A common dianhydride, pyromellitic dianhydride (PMDA), is reacted with various short-chain diamines to produce polymers with high imide density. Homopolymers and copolymers synthesized had dielectric constants ranging from 3.96 to 6.57.
Dianhydrides | Dianhydride Chemistry
网页A quick primer – dianhydrides have an extensive history as thermal curatives for epoxy resins and as co-monomers for polyimide synthesis. Dianhydrides were vital to the emerging electronics market of the 1960s, with epoxy polymers that offered sustainable properties under adverse conditions.
PTCDA 97 128-69-8 - MilliporeSigma
网页Perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) is a perylene derivative which forms highly crystalline films and dyes that can be used for a majority of electronic and opto-electronic applications. It provides a high electron mobility due to its low intermolecular distance which results in π-π conjugation.