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PMDA
(redirected from Pyromellitic Dianhydride)

   Also found in: Encyclopedia 0.01 sec.
AcronymDefinition
PMDAPyromellitic Dianhydride (chemistry)
PMDAPhotoImaging Manufacturers and Distributors Association
PMDAPharmaceuticals and Medical Device Agency (Japan)
PMDAPlutonium Management and Disposition Agreement (US-Russia)
PMDAProgramme for Museum Development in Africa
PMDAPlastics Machinery Distributors' Association (United Kingdom)
PMDAProject: Most Downloaded App (mobile phones)


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EXPERIMENTAL Material Used PAA a condensation product of benzene-1, 2, 4, 5-tetra-carboxylic-l,2, 4, 5-dianhydride or pyromellitic dianhydride (PMDA), and 4, 4'-diaminodiphenyl ether or oxydianilline (ODA) was procured from M/s ABR Organics, Hyderabad, India and this product was marketed as ABRON S-10.
polyamic acid (PAA) having molecular weight 42,000 a condensation product of pyromellitic dianhydride and oxydianiline (ODA).
[20, 21] mentioned molar complexes between the studied solvent, 1-methyl-2-pyrrolidinone (NMP) and pyromellitic dianhydride dianiline poly(amic acid)s where four molecules of NMP hydrogen bond to the repeat unit of the precursor creating populations of bound and free species of NMP.
 
 
 
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