Quantification of Wood Flour and Polypropylene in Chinese Fir/Polypropylene Composites by FTIR

• Published in: Guang pu xue yu guang pu fen xi Vol. 35; no. 6; p. 1546
• Main Authors: Lao, Wan-li, Li, Gai-yun, Zhou, Qun, Qin, Te-fu
• Format: Journal Article
• Language: Chinese
• Published: China 01.06.2015
• ISSN: 1000-0593
• DOI: 10.3964/j.issn.1000-0593(2015)06-1546-05

The ratio of wood and plastic in Wood Plastic Composites (WPCss) influences quality and price, but traditional thermochemical methods cannot rapidly and accurately quantify the ratio of wood/PP in WPCss. This paper was addressed to investigate the feasibility of quantifying the wood flour content and plastic content in WPCss by Fourier Transform Infrared (FTIR) spectroscopy. With Chinese fir, polypropylene (PP) and other additives as raw materials, 13 WPCs samples with different wood flour contents, ranging from 9.8% to 61.5%, were prepared by modifying wood flour, mixing materials and extrusion pelletizing. The samples were analyzed by FTIR with the KBr pellets technique. The absorption peaks of WPCss at 1059, 1 033 and 1 740 cm(-1) are considered as characteristic of Chinese fir, and the absorption peaks at 1 377, 2 839 and 841 cm(-1) are typical of PP by comparing the spectra of WPCss with that of Chinese fir, PP and other additives. The relationship between the wood flour content, PP content in WPCss and