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Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (6): 1057-1062.doi: 10.1007/s40242-016-6101-y

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Chemical Modifications on Linen for Unsaturated Polyester Composites

HU Qiuxue, YAN Xinxin, DONG Chenjun, HU Wei   

  1. Chemical Engineering Institute, Changchun University of Technology, Changchun 130012, P. R. China
  • Received:2016-03-21 Revised:2016-10-10 Online:2016-12-01 Published:2016-10-24
  • Contact: HU Wei, E-mail:huwei@ccut.edu.cn E-mail:huwei@ccut.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21404013), the Science and Technology Development Plan of Jilin Province, China(Nos.20140204039GX, 20160101323JC), the Changchun Science and Technology Plan Project, China(No.14KG105), the College Students' Innovation and Entrepreneurship Training Plan of Higher School in Jilin Province, China(No.2016cxcy104), the Research Project of Science and Technology of the Education Department of Jilin Province During the 12th Five-year Plan Period, China(No.2015-78).

Abstract:

Linen was chemically modified by oleoyl chloride(OC) and stearoyl chloride(SC) to graft fatty moieties onto fiber via ester connections. Pyridine was used as solvent. The reaction was simplified by reacting the compounds in air at 60℃ for 6 h. Fourier transform infrared spectroscopy(FTIR) and thermal gravimetric analysis were conducted to characterize the treated fiber. The FTIR result confirms that the fatty portions have been successfully grafted onto the fiber after the chemical modification. The thermal stability of the SC-modified linen(SCL) was similar to that of the flax modified by oleoyl chloride(OCL). SCL and OCL demonstrated a temperature of 5% mass loss, which was above 200℃ and could meet the requirements of the processing conditions for most composites. Thereafter, the SCL-reinforced unsaturated polyester(UPE) composites were prepared and characterized. The composite presented a much better impact strength of 61.1 J/m and tensile modulus of 1.69 GPa than those of UPE with applicable thermal stability. SCL has been shown to be a promising choice as reinforcing material for composites.

Key words: Oleoyl chloride, Stearoyl chloride, Flax, Modification, Composite