2014
DOI: 10.1016/j.polymer.2014.10.039
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Carbon dioxide adduct from polypropylene glycol grafted polyethyleneimine as a climate-friendly blowing agent for polyurethane foams

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Cited by 29 publications
(60 citation statements)
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“…The upper limit of the CO 2 release temperature range in bPEI–CO 2 was higher than that in C 16 –bPEI–CO 2 (182 vs. 147 °C, dashed line in Figure ); this suggested that grafting with hydrophobic side chains facilitated the release of CO 2 . This was similar to our previous observation in PPG‐grafted bPEI . Because of the steric hindrance, palmitic acid molecules preferably grafted onto primary amines rather than secondary amines of bPEI; this resulted in fewer primary amines in C 16 –bPEI than in bPEI.…”
Section: Resultssupporting
confidence: 90%
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“…The upper limit of the CO 2 release temperature range in bPEI–CO 2 was higher than that in C 16 –bPEI–CO 2 (182 vs. 147 °C, dashed line in Figure ); this suggested that grafting with hydrophobic side chains facilitated the release of CO 2 . This was similar to our previous observation in PPG‐grafted bPEI . Because of the steric hindrance, palmitic acid molecules preferably grafted onto primary amines rather than secondary amines of bPEI; this resulted in fewer primary amines in C 16 –bPEI than in bPEI.…”
Section: Resultssupporting
confidence: 90%
“…The CO 2 adduction formed carbamate anions and alkylammonium cations in both bPEI–CO 2 and C 16 –bPEI–CO 2 (Figure ). As a result, a group of strong IR bands at 1630, 1570, 1477, and 1413 cm −1 [Figure (B)] emerged in bPEI–CO 2 ; these could be assigned to δ NH in ammonium, ν CO in carbamate, and the asymmetrical and symmetrical skeletal stretching of carbamate anions, respectively. The ν NH adsorptions in both alkylammonium (from 2200 to 3200 cm −1 ) and NHCOO − (3420 cm −1 ) groups fused together and formed a very broad peak that spanned from 2200 to 3700 cm −1 and covered the aliphatic ν CH adsorptions.…”
Section: Resultsmentioning
confidence: 99%
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“…Polyurethane foam has an ageing effect that induced changes in its properties . Especially, as shown in the compression performance assessment for 50 wt%, if a certain amount of HFC‐365mfc is exceeded, performance is dramatically degraded.…”
Section: Resultsmentioning
confidence: 99%
“…Vykstant šiems procesams, išskiriamų CO2 dujų kiekiai yra milžiniški. Kita vertus, poliuretano gamybos metu išsiskiriančių CO2 dujų kiekis yra labai mažas ir, lyginant su tradiciniais dujodriais, ODP ir GWP yra nuo kelių iki kelių šimtų kartų mažesnis (Nunez et al 2010), tačiau, šios medžiagos laikymui ir maišymui kartu su poliuretano žaliavomis reikalinga itin sudėtinga įranga (Grolier, Randzio 2012;Kim, Youn 2000;Fieback et al 2011;Dai et al 2013;Log et al 2014). Dėl šios priežasties imta ieškoti kitų, pigesnių ir patrauklesnių alternatyvų.…”
Section: Tradiciniai Dujodariai Ir Jų Alternatyvosunclassified