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標題: Properties of phenol-formaldehyde resins prepared from phenol-liquefied lignin
作者: Lee, W.J.
Chang, K.C.
Tseng, I.M.
關鍵字: lignin;liquefaction;phenol-formaldehyde resin;plywood;liquefaction mechanism;acid catalysis;resol resins;wood;particleboard;adhesive;behavior;bark
Project: Journal of Applied Polymer Science
期刊/報告no:: Journal of Applied Polymer Science, Volume 124, Issue 6, Page(s) 4782-4788.
In this study, alkaline lignin (AL), dealkaline lignin (DAL), and lignin sulfonate (SL) were liquefied in phenol with sulfuric acid (H2SO4) or hydrochloric acid (HCl) as the catalyst. The phenol-liquefied lignins were used as raw materials to prepare resol-type phenol-formaldehyde resins (PF) by reacting with formalin under alkaline conditions. The results show that phenol-liquefied lignin-based PF resins had shorter gel time at 135 degrees C and had lower exothermic peak temperature during DSC heat-scanning than that of normal PF resin. The thermo-degradation of cured phenol-liquefied lignin-based PF resins was divided into four temperature regions, similar to the normal PF resin. When phenol-liquefied lignin-based PF resins were used for manufacturing plywood, most of them had the dry, warm water soaked, and repetitive boiling water soaked bonding strength fitting in the request of CNS 1349 standard for Type 1 plywood. (c) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
ISSN: 0021-8995
DOI: 10.1002/app.35539
Appears in Collections:期刊論文

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