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首页> 外文期刊>Journal of Applied Polymer Science >Graft copolymerization of nitrile monomers onto bleached jute fiber using potassium persulfate system and their textile characteristics
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Graft copolymerization of nitrile monomers onto bleached jute fiber using potassium persulfate system and their textile characteristics

机译：过硫酸钾体系腈单体在漂白黄麻纤维上的接枝共聚及其纺织特性

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摘要

Graft copolymerization of nitrile monomers, such as acrylonitrile and methacrylonitrile, onto bleached jute fiber was carried out by using K2S2O8/FeSO4 redox system in nitrogen atmosphere and their effect on the textile characteristics was also investigated. Percent graft yield increased with the increase of concentrations of monomer, initiator, and catalyst, reaction time, and reaction temperature up to a certain value, and, thereafter, it decreased. The effect of percent grafting efficiency was similar to that of percent graft yield, except for the monomer concentration. The increase of percent graft yield was dependent on the availability of jute-macroradicals as well as monomer radicals. Sometimes the predominancy of homopolymerization over grafting and the premature termination of growing grafted chains occurred because of the higher monomer radicals and excess primary radicals, SO4-. and (OH)-O-., from K2S2O8 initiator. The percent graft yield of acrylonitrile and methacrylonitrile was 20.5 and 29.1%, respectively. Higher graft yield for methacrylonitrile might be due to the methyl group present in it. Infrared spectra at 2229-2235 cm(-1) of acrylonitrile- and methacrylonitrile-grafted jute strongly supported the graft formation. Grafting of jute fiber improved the thermal stability, protected from photooxidative degradation, and decreased swellability as well as dyeability, etc. (C) 2004 Wiley Periodicals, Inc.
机译：在氮气氛围下，采用K2S2O8 / FeSO4氧化还原体系，将丙烯腈和甲基丙烯腈等腈类单体接枝到漂白的黄麻纤维上，研究了它们对织物特性的影响。随单体，引发剂和催化剂的浓度，反应时间和反应温度的增加，接枝产率百分比增加到一定值，然后下降。除单体浓度外，接枝效率百分数的影响与接枝产率百分数的影响相似。接枝率的增加取决于黄麻基自由基和单体基团的可用性。有时，由于较高的单体自由基和过量的伯自由基SO4-的存在，均聚反应在接枝反应中占主导地位，而接枝链增长则提前终止。 （OH）-O-。，来自K2S2O8引发剂。丙烯腈和甲基丙烯腈的接枝率分别为20.5％和29.1％。甲基丙烯腈的较高接枝产率可能是由于其中存在甲基。在2229-2235 cm（-1）的丙烯腈和甲基丙烯腈接枝的黄麻的红外光谱强烈支持了接枝的形成。黄麻纤维的接枝改善了热稳定性，防止了光氧化降解，并降低了可溶胀性和染色性等。（C）2004 Wiley Periodicals，Inc.

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