caa a22 4500 465787339 CHVBK 20180323112013.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00395569 doi (NATIONALLICENCE)springer-10.1007/BF00395569 Synthesis and characterization of alternating copolyimides containing aliphatic spacers [Elektronische Daten] [C. Avadhani, S. Vernekar] Summary: Alternating copolyimides and homopolyimides of pyromellitic dianhydride and benzophenonetetracarboxylic dianhydride containing aliphatic spacers have been synthesized by the solution polycondensation of N,N-bis(isocyanatoalkyl)-1,2,4,5-benzenetetracarboxylic-1,2:4,5-diimides and N, N-bis(isocyanatoalkyl)-3,3′: 4,4′-diimides with pyromellitic dianhydride (PMDA) and benzophenonetetracarboxylic dianhydride (BTDA) in dimethylacetamide. These polyimides are semicrystalline, thermally stable and soluble in polar aprotic solvents with inherent viscosities in the range 0.29 - 0.62 dL/g in m-cresol. Springer-Verlag, 1990 Avadhani C. Division of Polymer Chemistry, National Chemical Laboratory, 411008, Pune, India aut Vernekar S. Division of Polymer Chemistry, National Chemical Laboratory, 411008, Pune, India aut Polymer Bulletin Springer-Verlag 24/5(1990-11-01), 487-492 0170-0839 24:5<487 1990 24 289 https://doi.org/10.1007/BF00395569 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00395569 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Avadhani C. Division of Polymer Chemistry, National Chemical Laboratory, 411008, Pune, India aut NATIONALLICENCE 700 1- Vernekar S. Division of Polymer Chemistry, National Chemical Laboratory, 411008, Pune, India aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 24/5(1990-11-01), 487-492 0170-0839 24:5<487 1990 24 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer