TY - JOUR
T1 - Curing behavior of urea-formaldehyde resin modified with cooking waste oil-based pMDI prepolymer and its influence on particleboard properties
AU - Kang, Eun Chang
AU - Park, Sang Bum
AU - Sun, Xiuzhi Susan
AU - Park, Byung Dae
AU - Park, Heon
PY - 2007/6
Y1 - 2007/6
N2 - This research attempted to study the curing behavior of polymeric diphenylmethane-4, 4′-diisocyanate (pMDI) modified with cooking waste oil (CWO) that could replace expensive polyol in the preparation of isocyanate prepolymer. The adhesion properties of the isocyanate prepolymer mixed with urea-formaldehyde (UF) resin are also investigated. For this purpose, CWO/pMDI prepolymers with different ratios of CWO to pMDI were prepared, and their chemical structure and adhesive performance were examined by Fourier transform Infrared (FT-IR) spectrum and bond strength measurement. The CWO/pMDI ratio with the highest bond strength was selected and mixed with UF resin at four different concentrations. The chemical structures and curing behaviors of CWO/pMDI prepolymers were examined using FT-IR spectrometers and differential scanning calorimetry (DSC). Particleboard (PB) was also produced to evaluate the adhesion strength of CWO/pMDI prepolymers. When the CWO and pMDI were mixed, the -NCO group's peak was detected at 2,008 to 2,543 cm-1, and the bond strength was highest when the CWO/pMDI ratio was 1.0. When the UF resin and CWO/pMDI prepolymers were mixed at designated ratios, the -NCO group's peak appeared at 2,270 cm -1 and increased as the CWO/pMDI prepolymer content increased. Fastest gel time and lowest on-set and peak temperatures occurred at the CWO/pMDI prepolymer content of 10 %wt, at which both heat of reaction (ΔH) and activation energy (Ea) also reached their lowest points. PBs manufactured with UF resin-CWO/pMDI pre-polymer at different ratios showed an increase in bending and internal bonding properties and a decrease in thickness swelling as the ratio of the CWO/pMDI prepolymer to the UF resin increased. The formaldehyde emission of PB prepared with CWO/ pMDI prepolymers was generally greater than that of the UF resin. In conclusion, the mixing ratio of CWO to pMDI was optimal at 1.0, and the addition of 10%wt UF resin to the CWO/pMDI prepolymer yielded the best properties of PB.
AB - This research attempted to study the curing behavior of polymeric diphenylmethane-4, 4′-diisocyanate (pMDI) modified with cooking waste oil (CWO) that could replace expensive polyol in the preparation of isocyanate prepolymer. The adhesion properties of the isocyanate prepolymer mixed with urea-formaldehyde (UF) resin are also investigated. For this purpose, CWO/pMDI prepolymers with different ratios of CWO to pMDI were prepared, and their chemical structure and adhesive performance were examined by Fourier transform Infrared (FT-IR) spectrum and bond strength measurement. The CWO/pMDI ratio with the highest bond strength was selected and mixed with UF resin at four different concentrations. The chemical structures and curing behaviors of CWO/pMDI prepolymers were examined using FT-IR spectrometers and differential scanning calorimetry (DSC). Particleboard (PB) was also produced to evaluate the adhesion strength of CWO/pMDI prepolymers. When the CWO and pMDI were mixed, the -NCO group's peak was detected at 2,008 to 2,543 cm-1, and the bond strength was highest when the CWO/pMDI ratio was 1.0. When the UF resin and CWO/pMDI prepolymers were mixed at designated ratios, the -NCO group's peak appeared at 2,270 cm -1 and increased as the CWO/pMDI prepolymer content increased. Fastest gel time and lowest on-set and peak temperatures occurred at the CWO/pMDI prepolymer content of 10 %wt, at which both heat of reaction (ΔH) and activation energy (Ea) also reached their lowest points. PBs manufactured with UF resin-CWO/pMDI pre-polymer at different ratios showed an increase in bending and internal bonding properties and a decrease in thickness swelling as the ratio of the CWO/pMDI prepolymer to the UF resin increased. The formaldehyde emission of PB prepared with CWO/ pMDI prepolymers was generally greater than that of the UF resin. In conclusion, the mixing ratio of CWO to pMDI was optimal at 1.0, and the addition of 10%wt UF resin to the CWO/pMDI prepolymer yielded the best properties of PB.
UR - http://www.scopus.com/inward/record.url?scp=34547491289&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:34547491289
SN - 0015-7473
VL - 57
SP - 51
EP - 58
JO - Forest Products Journal
JF - Forest Products Journal
IS - 6
ER -