Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Naphthalene diisocyanate structure

Abstract Three series of new polyimides were prepared by condensation of imidazole-blocked 2,5-bis(n-alkoxymethyl)-1,4-benzene diisocyanates with pyromellitic dianhydride (PMDA), benzophenone tetracarboxylic dianhydride (BPDA), and naphthalene tetracarboxylic dianhydride (NTDA), respectively. After the polymers obtained were spectroscopically characterized, their solubilities, thermal properties and crystalline structures were measured and discussed. It was found that structures and properties of the polyimides having regularly substituted n-alkoxymethyKn-CHjOC Hj j, m=4,6,8) side branches are governed not only by side chain length, but also by main chain rigidity. [Pg.401]

See other pages where Naphthalene diisocyanate structure is mentioned: [Pg.247]    [Pg.3271]    [Pg.210]    [Pg.419]    [Pg.93]    [Pg.13]    [Pg.189]    [Pg.67]   
See also in sourсe #XX -- [ Pg.14 , Pg.74 , Pg.75 ]



SEARCH



Diisocyan

Naphthalene structure

© 2024 chempedia.info