FT-IR spectroscopic studies of polyurethanes Part I. Bonding between urethane C-O-C groups and the NH Groups (Record no. 48991)
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| fixed length control field | 01793nam a2200181Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625153948.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-14806 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | FT-IR spectroscopic studies of polyurethanes Part I. Bonding between urethane C-O-C groups and the NH Groups |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Journal of Molecular Structure, 263, p.45-57 , 1991 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Fourier-transform-infrared-attenuated total internal reflectance (FT-IR-ATR)has been used to study polyurethanes containing different hard segments but the same soft segment. The spectra of a series of blended polyurethanes have been systematically studied. The changes in the urethane C-O-C regions of the olyurethanes with respect to the hard segments make a strong case for the existence of hydrogen-bonding interactions between the urethane C-O-C groups and the NH groups. The decreases in the relative intensities of carbonyl bands and shifts of NH stretching bands (as the urethane C-O-C bonding with NH groups increases)are in support of this proposal. The urethane C-O-C region is shown to be a useful region in interpreting ATR spectra of polyu- rethanes. The implications of these results to the present methods of estimating phase separations in polyurethanes are discussed. Results obtained from ab initio quantum hemical computational methods show this hydrogen bond to be directional and to have an energy of 6.32 kcal mol-' (compared with carbonyl hydrogen bond energy of 8.37 kcal mol-')which is surprisingly high. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Bandekar, J. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Klima, S. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1mTX9g7_meNAkCl2J_7UiyQU4jh_00NCp/view?usp=drivesdk">https://drive.google.com/file/d/1mTX9g7_meNAkCl2J_7UiyQU4jh_00NCp/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-14806 | 25.06.2025 | 25.06.2025 | Documentos solicitados |