Isocyanate — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Isocyanate har tendens til at absorbere, samlet fra publiceret litteratur og rangeret efter understøttende bevis. Hver tildeling kan spores til en kilde (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Isocyanate tildeles normalt ved at lede efter en tilbagevendende klynge af karakteristiske toppe frem for et præcist lærebogsnummer. Tabellen nedenfor viser, hvor litteraturen oftest placerer denne gruppe i FTIR, rangeret efter akkumuleret evidens.
Karakteristiske FTIR-toppe for Isocyanate
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 2270 | 15 | 13 | 1,0 |
| 2250 | 7 | 5 | 1,0 |
| 2266 | 5 | 5 | 1,0 |
| 2252 | 2 | 2 | 1,0 |
| 2260 | 2 | 1 | 1,0 |
| 2360 | 1 | 1 | 1,0 |
| 1647 | 1 | 1 | 1,0 |
| 1689 | 1 | 1 | 1,0 |
| 2273 | 1 | 1 | 1,0 |
| 524 | 1 | 1 | 1,0 |
| 2263 | 1 | 1 | 1,0 |
| 2271 | 1 | 1 | 1,0 |
| 1445 | 1 | 1 | 1,0 |
| 2253 | 1 | 1 | 1,0 |
| 2276 | 1 | 1 | 1,0 |
| 2850 | 1 | 1 | 1,0 |
| 2350 | 1 | 1 | 1,0 |
| 2097 | 1 | 1 | 1,0 |
| 2142 | 1 | 1 | 1,0 |
| 2264 | 1 | 1 | 1,0 |
| 2280 | 1 | 1 | 1,0 |
| 2262 | 1 | 1 | 1,0 |
| 2240 | 1 | 1 | 1,0 |
| 2281 | 1 | 1 | 1,0 |
| 2275 | 1 | 1 | 1,0 |
| 2244 | 1 | 1 | 1,0 |
| 2258 | 1 | 1 | 1,0 |
| 1639 | 1 | 1 | 1,0 |
| 2241 | 1 | 1 | 0,95 |
| 1526 | 1 | 1 | 0,7 |
Viser de 30 bedst understøttede toppe ud af 32 i alt for Isocyanate.
Spektrumlogik
En funktionel gruppetildeling bliver mere sikker, når flere forventede bånd optræder sammen. Brug denne side til at finde de bedst understøttede peaks, og bekræft derefter, at den samme prøve udviser et sammenhængende mønster snarere end et enkelt isoleret hit.
Anvendelse i virkeligheden
Disse sider er nyttige til analyse af ukendte materialer, topforklaring i rapporter, polymerfejlfinding og verifikation af, om en kandidatmaterialefamilie er kemisk plausibel.
Almindelige fejl
- Brug af én funktionel-gruppe-side som en komplet materialebedømmelse uden at kontrollere resten af spektret.
- Antager, at det stærkeste bånd altid er det mest diagnostiske.
- At glemme, at forarbejdning, tilsætningsstoffer, ældning og blandinger kan flytte eller udvide forventede toppe.
Verifikationsrådgivning
Brug DSC, GC-MS eller TGA, når flere materialefamilier deler lignende bånd, eller når blandings-effekter gør FTIR-tildelingen usikker.
Litteratur bag disse tildelinger
-
2270 cm⁻¹ tillid 1,0
“Samples were canbeobserved[17].Thereactionbetweenurethaneprepolymerand dehydratedingradedalcohols(10,30,50,70,80,85,90,95,and100%) polyvinyl alcohol indicates the absence of isocyanate peaks (NCO) at 2270cm-1.”
Preparation and characterization of polyvinyl alcohol hydrogels crosslinked by biodegradable polyurethane for tissue engineering of cartilage DOI: 10.1016/j.msec.2010.02.017 -
2270 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Curing reaction kinetics of HTPE polymer studied by simultaneous rheometry and FTIR measurements DOI: 10.1007/s10973-016-5485-8 -
1639 cm⁻¹ tillid 1,0
“Small band at 1639 belongs to carbonyl (-C=O) with C=O-NH arrangements of traces of urea which may be present due to the reaction of excess isocyanate with moisture in air.”
Preparation and characterization of aliphatic polyurethane and modified hydroxyapatite composites for bone tissue engineering DOI: 10.1007/s00289-019-03067-5 -
2258 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
In situ FTIRATR studies on the structure development of polyurethaneurea systems DOI: 10.1002/app.34199 -
2266 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Reaction kinetics of dicyclohexylmethane-4,4[prime]-diisocyanate with 1- and 2-butanol: A model study for polyurethane formation DOI: 10.1002/app.28320 -
2250 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Degradation of polyester polyurethane by an indigenously developed consortium of Pseudomonas and Bacillus species isolated from soil DOI: 10.1016/j.polymdegradstab.2016.11.003 -
2244 cm⁻¹ tillid 1,0
“the disappearance of isocyanate peak at 2244 using FTIR-ATR.”
Shoaib 和 Bahadur - 2016 - Synthesis of thermally and mechanically improved p DOI: 10.1515/epoly-2016-0134 -
2270 cm⁻¹ tillid 1,0
“cm-1 cm-1 N=C=O peak at 2270 was ascribed to bonds.”
Novel Polyvinyl Alcohol (PVA)/Cellulose Nanocrystal (CNC) Supramolecular Composite Hydrogels: Preparation and Application as Soil Conditioners DOI: 10.3390/nano9101397
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