Flame-retardant properties of chitin liquefaction-based polyurethane foam

Chen, Fanfan; Wang, Chiyi; Liu, Xiaoyun; Wang, Zhifen; Lin, Fu‐Cheng; Zhang, Yucang

doi:10.1007/s10965-023-03521-z

Cited by 7 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak of the ether bond C-O-C from 1112 cm −1 to 1043 cm −1 indicates that the liquefied polyol and isocyanate are involved in the reaction, and R-PUF has the basic structure of a carbamate. 23 The peak at 2280 cm −1 is asymmetric stretching vibration of the -NCO, 26 which also indicates the generation of R-PUF. The isocyanate R-N = C = O contains two hetero double bonds, which are active and can easily react with active hydrogen, while DOPO contains P-H bonds, they form a covalent bond to the main or side chain of PU, thus achieving a reactive flame retardant.…”

Section: Resultsmentioning

confidence: 99%

“…The acid number of the reed liquefaction product was tested using the method given by national standard GB/T 12,008.5–2010, 23 and the hydroxyl value was tested using the method given by national standard GB/T 12008.3-2009.…”

Section: Methodsmentioning

confidence: 99%

“…The acid number of the reed liquefaction product was tested using the method given by national standard GB/T 12,008.5-2010, 23 and the hydroxyl value was tested using the method given by national standard GB/T 12008. 3-2009. An FTIR spectrometer (Bruker TENSOR-27 spectrometer) was used to test the reed liquefaction product and polyurethane foams.…”

Section: Characterizationmentioning

confidence: 99%

“…b) shows the IR spectra of R-PUF added with different amounts of DOPO, the absorption peak at 2385 cm À1 (P-H) disappears, indicating that DOPO is bound to R-PUF, and R-PUF is a reactive type of flame retardant. The peak of the ether bond C-O-C from 1112 cm À1 to 1043 cm À1 indicates that the liquefied polyol and isocyanate are involved in the reaction, and R-PUF has the basic structure of a carbamate 23. The peak at 2280 cm À1 is asymmetric stretching vibration of the -NCO,26 which also indicates the generation of R-PUF.…”

mentioning

confidence: 98%

See 3 more Smart Citations

Preparation and intrinsical flame resistance of reed-based polyurethane foam modified by 9,10-dihydro-9-oxa-10 phosphaphenanthrene 10-oxide

Jiao,

Zhang,

et al. 2024

Journal of Cellular Plastics

View full text Add to dashboard Cite

The production of polyurethane foam (PUF) from green and sustainable agricultural waste reeds could replace traditional petroleum-based PUF. In this paper, reed naturally contains nano-SiO2.was liquefied to reed-based polyol (R-P) using Castor oil and PEG-400 as a compound solvent and H2SO4 as a catalyst, The liquefaction efficiency is as high as 97.16%; Reed-based polyurethane foam (R-PUF) was prepared with R-P, water, and isocyanate by one-pot and free rise method. Moreover, DOPO with a rigid ring and Phosphorus was introduced into the cross-linked structure of rigid PUF as a reactive-type flame retardant. The mechanical properties, microstructure, thermal stability, and flame retardance of the R-PUFs were investigated, The results showed that the density of R-PUF was 33.03 kg/m3, the thermal conductivity was 0.0350 W/(m·K), and the limiting oxygen index (LOI) was 20.5%, which was higher than petroleum-based polyurethane; the 6%-DOPO PUF has better flame retardant and thermal stability. The mechanism of R-PUF added DOPO is intrinsic flame retardant and the result of the presence of the gas phase inhibiting the combustion chain reaction and the coalescence phase blocking the transfer of oxygen and heat to the interior of the foam.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

mentioning

confidence: 98%

See 2 more Smart Citations

Preparation and intrinsical flame resistance of reed-based polyurethane foam modified by 9,10-dihydro-9-oxa-10 phosphaphenanthrene 10-oxide

Jiao,

Zhang,

et al. 2024

Journal of Cellular Plastics

View full text Add to dashboard Cite

show abstract

“…10 Derivatives based on 9,10-dihydro-9-oxa-10-phosphaphenantrene-10-oxide (DOPO) are well known as attractively alternative flame retardants for various polymers, and have been widely used in epoxy, polyester, and polyamide. [11][12][13][14][15][16] The H-phosphinate compound of DOPO can tautomerize to its P OH form, so that it can react with nucleophilic and electrophilic species. 17 This feature was extensively used to achieve DOPO diacid flame retardants by reacting with reactive monomers, for example, itaconic acid based DOPO(ITA-DOPO) and maleic acid (MA-DOPO).…”

Section: Introductionmentioning

confidence: 99%

Preparation of high‐efficient flame retardant PA6 via DOPO‐ITA initiated ring‐opening polymerization of caprolactam

Zhang,

zheng,

Xiao

et al. 2023

Journal of Polymer Science

View full text Add to dashboard Cite

It has been a long‐term challenge to synthesize intrinsically flame retardant polyamide 6 (FRPA6) with high‐molecular weight. In this work, through the ring‐opening polymerization of caprolactam initiated by 9,10‐dihydro‐10‐[2,3‐di(hydroxycarbonyl)propyl]‐10 phosphaphenanthrene‐10‐oxide (DOPO‐ITA), intrinsically flame retardant PA6 with high‐molecular weight was successfully prepared. Its chemical structure, thermal stability, mechanical and combustion properties, as well as the retarding mechanism were thoroughly characterized in detail. The FRPA6 containing 3.0% retardant could achieve a V‐0 rating with an LOI value of 31.2%. An interesting phenomenon was observed during V‐0 tests. The melt drip slowly extended downward to form a long strip after moving fire, which was in favor of its heat release in a short time, thereby effectively prevented it from igniting the cotton. That is, a facile method to prepare intrinsically high‐efficiency fire retardant polymer via ring opening and polycondensation was proposed.

show abstract