Thermal degradation behavior of rigid polyrethane foams prepared with different fire retardant concentrations and blowing agents (Record no. 48161)
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| 000 -LEADER | |
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| fixed length control field | 03045nam a2200301Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625153932.0 |
| 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-13965 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Thermal degradation behavior of rigid polyrethane foams prepared with different fire retardant concentrations and blowing agents |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Polymer, 43(24), p.6471-6479, 2002 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | In order to understand the effect of flame retardant (FR)and blowing agents on the thermal stability of rigid polyurethane foams and their resultant chars, two series of polyurethane foams produced with different blowing agents (HCFC-141b and pentane)and various concentrations of a FR (0-50 wtporcent)were investigated using standard flammability test (ASTM, D-3014), solid-state 13C NMR, TGA and Py-GC/MS. The unique combination of these analytical techniques has proved to be a valuable method for understanding the thermal degradation of rigid polyurethane foams. The standard flammability tests indicate an optimum FR concentration of about 15 wt percent for foams using HCFC-141b as the blowing agent, while no optimum condition was determined with pentane. The percent mass retained (PMR)values or char yields have a linear relationship with combustion flame temperature in both series of blowing agents. The solid-state 13C NMR studies clearly show that pentane is chemisorbed during the polymerization and is retained within the foam matrix. The chars have lower concentrations of methylene and oxygenated aliphatic carbons, but a subsequent increase in aromatics is observed. The FR investigated preserves the chemical structure of the polyurethane foam, and, therefore, results in a higher PMR or char yield. The TGA experimental data showed that the maximum combustion reactivities of the chars have a linear relationship with the FR concentration in the parent foams. Py- GC/MS results indicate that the aliphatic oxygenated functional groups are the first to evolve during the pyrolysis and combustion of the polymeric structure. Finally, this study has shown that the addition of FR to the foam ormulation results in lower concentrations of small molecules being volatilized, and therefore, preserving the original chemical structure of the parent foam. However, the FR investigated does not seem to be as effective for the pentane series, and gives higher char aromaticities and PMR values than those reported for the HCFC-141b series. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | RIGID POLYURETHANE FOAMS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | THERMAL DEGRADATION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | FLAME RETARDANT |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Zhong T. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Maroto-Valer, M.M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Andrésen, J.M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Miller, J.M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Miller, J.W. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Listemannb, M.L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mcdaniel, P.L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mcdaniel, P.L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Furlan, W.R. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/17NSdp6najCYOCe9L-Wbt9X7IpPwwWtrs/view?usp=drivesdk">https://drive.google.com/file/d/17NSdp6najCYOCe9L-Wbt9X7IpPwwWtrs/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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-13965 | 25.06.2025 | 25.06.2025 | Documentos solicitados |