PREPARATION AND CHARACTERIZATION OF BIODEGRADABLE RIGID POLYURETHANE FOAMS FROM THE LIQUEFIED EUCALYPTUS AND PINE WOODS
Küçük Resim Yok
Tarih
2014
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Slovak Forest Products Research Inst
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, eucalyptus (Eucalyptus camaldulensis L.) and pine (Pinus sylvestris L.) woods were liquefied using the the blended solvents mixture of polyethylene glycol PEG-400/glycerin in the presence of sulfuric acid as a catalyst at 140-160 degrees C for 120 min. The insoluble parts in the liquefied eucalyptus and pine were found as 17.8 and 5.5 wt. %, respectively. The acid and hydroxyl numbers of the liquefied eucalyptus and pine were determined and compared with each other. Polyurethane-type rigid foams (RPUFs) were successfully prepared by a co-polymerization of the liquefied woods (LWs) and polymeric methylene diphenylene diisocyanate (PMDI). The compressive strength (120 to 250 kPa), the modulus of elasticity (1 to 6 MPa), the density (20 to 50 kg.m(-3)) and thermal conductivity (0.0352 to 0.0374 W.mK(-1)) of the RPUFs prepared from the LWs were found to be almost comparable to those of the synthetic foams. Furthermore, the biodegradability of the biomass-based foams was higher than that of the synthetic ones.
Açıklama
Anahtar Kelimeler
Polyurethane foams, biodegradable, Eucalyptus camaldulensis, Pinus sylvestris, biomass, liquefaction
Kaynak
Wood Research
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
59
Sayı
1
