@article{Lin_Sun_Yue_Wang_Tu_Gao_2014, title={Study on preparation and properties of phenol-formaldehyde-chinese fir liquefaction copolymer resin}, volume={16}, url={https://revistas.ubiobio.cl/index.php/MCT/article/view/1154}, abstractNote={<p align="justify">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.</p>}, number={2}, journal={Maderas-Cienc Tecnol}, author={Lin, Ruihang and Sun, Jin and Yue, Chao and Wang, Xiaobo and Tu, Dengyu and Gao, Zhenzhong}, year={2014}, month={Dec.}, pages={159–174} }