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Radiation grafting of poly(vinyl acetate) onto wheat straw and properties of the product

文献类型： 外文期刊

作者： Qu, Ping 1 ; Wu, Guo-Feng 2 ; Wu, Jing-Xia 1 ; Zhao, Yong-Fu 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China

关键词： Wheat straw;Poly(vinyl acetate);Radiation grafting;Composites

期刊名称：NUCLEAR SCIENCE AND TECHNIQUES （ 影响因子：1.71； 五年影响因子：1.454 ）

ISSN： 1001-8042

年卷期： 2017 年 28 卷 11 期

页码：

收录情况： SCI

摘要： Poly(vinyl acetate) (PVAc) was grafted onto wheat straw by gamma-irradiation to improve the compatibility between wheat straw and high-density polyethelene (PE). The grafting was proved by Fourier transform infrared (FTIR) spectroscopy. The compact structure of wheat straw was loosened because the chemical bonds and crystalline structure were destructed by the gamma-rays. The modified wheat straw needed less energy for thermal transition, as revealed by differential scanning calorimetry (DSC). Thermal analysis revealed that grafted PVAc acted as a protective barrier for the wheat straw and leads to an increase in maximum pyrolysis temperature. The crystallite size of grafted wheat straw decreased to 5.33 nm from 5.63 nm before irradiation. There were holes in melted form appeared on the surface of the grafted wheat straws. Both the grafted PVAc and irradiation are beneficial to lower the torque of wheat straw/PE melts and improve its mechanical properties by 36%. Possible mechanism of irradiation grafting was proposed.

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