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首页> 外文期刊>Journal of Applied Polymer Science >Chemical modification of pineapple leaf fiber: Graft copolymerization of acrylonitrile onto defatted pineapple leaf fibers
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Chemical modification of pineapple leaf fiber: Graft copolymerization of acrylonitrile onto defatted pineapple leaf fibers

机译：菠萝叶纤维的化学改性：将丙烯腈接枝到脱脂菠萝叶纤维上

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Graft copolymerization of acrylonitrile (AN) onto defatted pineapple leaf fiber (PALF) was studied using a CuSO4 and KIO4 combination as an initiator in an aqueous medium in the temperature range 30-50 degrees C. The effects of the concentration of potassium periodate, CuSO4, and monomer on the graft yield were investigated. The effects of time, temperature, amount of some inorganic salts, and organic solvents on the graft yield are also reported. A combination of Cu2+-IO4- in an aqueous medium with an IO4- concentration of 0.005 mol L-1 and Cu2+ concentration of 0.002 mol L-1 produced optimum grafting for use of 0.1 g defatted PALF with a fiber-to-liquor ratio of 1:50 at 50 degrees C for 2 h. However, KIO4 and CuSO4 failed to induce polymerization of AN in the presence of PALF when used separately. FTIR and thermogravimetric analysis of the defatted and AN-grafted PALF were carried out. Grafting improved the thermal stability of PALF. (C) 2000 John Wiley & Sons, Inc. [References: 24]
机译：使用CuSO4和KIO4组合作为引发剂，在温度范围为30-50的水性介质中，研究了丙烯腈（AN）在脱脂菠萝叶纤维（PALF）上的接枝共聚反应。 ，并研究了单体对接枝率的影响。还报道了时间，温度，一些无机盐的量和有机溶剂对接枝产率的影响。 IO4-浓度为0.005 mol L-1和Cu2 +浓度为0.002 mol L-1的水性介质中Cu2 + -IO4-的结合产生了最佳的接枝，以使用0.1 g脱脂的PALF，纤维/液体比为1:50在50摄氏度下2小时。但是，单独使用时，KIO4和CuSO4在PALF存在下不能诱导AN聚合。对脱脂和AN接枝的PALF进行了FTIR和热重分析。接枝提高了PALF的热稳定性。 （C）2000 John Wiley＆Sons，Inc. [参考：24]

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