Synthesis and characterization of novel polyurethanes based on 4,4 `-[1,4-phenylenedi-diazene-2,1-dlyl] bis(2-carboxyphenol) and 4,4 `-[1,4-phenylenedi-diazene-2,1-diyl] bis(2-chlorophenol) hard segments
| Title | Synthesis and characterization of novel polyurethanes based on 4,4 `-[1,4-phenylenedi-diazene-2,1-dlyl] bis(2-carboxyphenol) and 4,4 `-[1,4-phenylenedi-diazene-2,1-diyl] bis(2-chlorophenol) hard segments |
| Publication Type | Journal Article |
| Year of Publication | 2007 |
| Authors | Raghu, AV, Gadaginamath, GS, Mathew, NT, Halligudi, SB, Aminabhavi, TM |
| Journal | Reactive & Functional Polymers |
| Volume | 67 |
| Issue | 6 |
| Pagination | 503-514 |
| Date Published | JUN |
| Type of Article | Article |
| ISSN | 1381-5148 |
| Keywords | azo polymers, fluorescence, hard segments, Morphology, phase separation, polyurethanes, spectroscopy, Thermal properties |
| Abstract | Eight novel polyurethanes (PUs) based on 4,4'-[1,4-phenylenedi-diazene-2,1-diyl]bis(2-carboxyphenot) and 4,4'-[1,4phenylenedi-diazene-2,1-diyl]bis(2-chloro- phenol) as hard segments with four diisocyanates viz., 4,4-diphenyl-methane diisocyanate, toluene 2,4-diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate were prepared. Structural and thermal characterization of the segmented PUs were determined by FT-IR, UV spectrophotometry, fluoroscence spectroscopy, H-1 NMR, C-13 NMR spectroscopy and DTA/TGA analysis. All the PUs contain domains of semi-crystalline and amorphous structures, as indicated by X-ray diffraction. PUs were soluble in polar aprotic solvents like N-methyl-2-pyrrolidone (NMP), dimethyl formamide (DMF) and dimethylsulfoxide (DIVISO). (c) 2007 Elsevier Ltd. All rights reserved. |
| DOI | 10.1016/j.reactfunctpolym.2007.02.003 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 2.725 |