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首页> 外文期刊>Journal of Applied Polymer Science >Microstructure and sulfonation of dual monomer-grafted polypropylene nonwoven fabrics
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Microstructure and sulfonation of dual monomer-grafted polypropylene nonwoven fabrics

机译：双单体接枝聚丙烯非织造织物的组织和磺化

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The sulfonation of styrenic polymers often needs harsh reaction conditions, such as concentrated sulfuric acid and elevated temperature. The awkward situation is handled by grafting copolymerization of polar and nonpolar monomers, and essentially the surface wettability between sulfonating agent and matrix polymer is circumvented in the study. Two pairs of dual monomers, glycidyl methacrylate (GMA)-acrylic acid (AA), styrene (St)-acrylic acid (AA), were grafted onto polypropylene nonwoven fabrics (PP) using thermal polymerization, and the resulted fabrics were further sulfonated using sodium sulfite and sulfuric acid, respectively. The microstructure of the modified fabrics was characterized by infrared spectroscopy and scanning electron microscopy. The ion exchange property was verified by copper (II) removal from aqueous solution, and its reutilization was carried out in electrochemical desorption process. The results show that hydrophilic and active monomer AA speeds grafting and sulfonation, but overload of AA will deteriorate copolymerization of GMA, and switch copolymerization chain component due to acylation with benzene ring. Although interfacial compatilizer promotes dual grafting, its overdosing may intensify microphase segregation of the grafting polymers owing to emulsification. The resultant granular polymers will be drained off during functionalization and reutilization processes. The ion exchange fabrics can be applied for treatment of metal ion wastewaters with unique electrochemical desorption feature. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48300.
机译：苯乙烯聚合物的磺化通常需要苛刻的反应条件，例如浓硫酸和升高的温度。通过接枝极性和非极性单体的共聚合来处理尴尬的情况，并且基本上在研究中规避磺化剂和基质聚合物之间的表面润湿性。两对双单体，甲基丙烯酸缩水甘油酯（GMA） - 丙烯酸（AA），使用热聚合接枝到聚丙烯非织造织物（PP）上，并使用得到的织物进一步磺化亚硫酸钠和硫酸分别。通过红外光谱和扫描电子显微镜表征改性织物的微观结构。通过从水溶液中除去的铜（II）验证离子交换性质，并在电化学解吸过程中进行其再利用。结果表明，亲水和活性单体AA速度接枝和磺化，但AA的过载将使GMA的共聚合劣化，并且由于苯环酰化而导致的开关共聚链组分。虽然界面升值剂促进双移植，但由于乳化，其过量的过量可能会加强嫁接聚合物的微相偏析。在官能化和再利用过程中，将产生所得粒状聚合物。离子交换织物可以应用于具有独特电化学解吸特征的金属离子废水处理。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48300。

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