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- Title
STUDY ON PREPARATION AND PROPERTIES OF PHENOL-FORMALDEHYDE-CHINESE FIR LIQUEFACTION COPOLYMER RESIN.
- Authors
Ruihang Lin; Jin Sun; Chao Yue; Xiaobo Wang; Dengyu Tu; Zhenzhong Gao
- Abstract
A new zero-waste and zero-pollution composite adhesive labeled Chinese fir-based adhesive for exterior plywood was synthesized by blending alkaline Chinese fir (Cunninghamia lanceolata) liquid with a small amount of phenol-formaldehyde (PF). The free phenol and free formaldehyde content of the Chinese fir-based adhesive were sharply decreased compared to normal PF resin by more than 50%. The synthetic adhesive show with excellent water resistance and environmental friendliness, which had a 28h boil-dry-boil wet bonding strength of 1,73MPa according to standard JIS K6806-2003 and a formaldehyde emission of 0,045mg/L according to standard JIS A1460-2003. The structural properties and their thermal properties of cured adhesives were evaluated using Fourier transform infrared (FT-IR) and differential scanning calorimetry (DSC). The FT-IR analysis confirmed the expected chemical structure as the Chinese fir liquid reacted with formaldehyde and phenol which occurred at the wavenumbers of 1733, 1698, 1652cm-1 and 1077, 1048 cm-1. Although the DSC results indicated that the Chinese fir-based adhesive's curing need higher temperature than the control PF resin, the higher curing temperature hardly cripple the availability of Chinese fir-based resin in the plywood production.
- Subjects
PHENOLIC resins; DIFFERENTIAL scanning calorimetry; PLYWOOD; CUPRESSACEAE; FOURIER transform infrared spectroscopy; COMPOSITE materials; ADHESIVES; COPOLYMERS
- Publication
Maderas: Ciencia y Tecnología, 2014, Vol 16, Issue 2, p159
- ISSN
0717-3644
- Publication type
Article
- DOI
10.4067/S0718-221X2014005000013