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pyromellitic dianhydride |
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pyromellitic dianhydride [‚pī·rō·mə′lid·ik ¦dī·an′hī‚drīd]
(organic chemistry) C6H2(C2O3)2A white powder with a melting point of 286°C; soluble in some organic solvents; used for curing epoxy resins. Abbreviated PMDA. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | 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. |
pyromellitic dianhydride |
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