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首页> 外文期刊>Journal of Applied Polymer Science >Electron spin resonance study and reactive extrusion of polyacrylamide and polydiallyldimethylammonium chloride
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Electron spin resonance study and reactive extrusion of polyacrylamide and polydiallyldimethylammonium chloride

机译：聚丙烯酰胺和聚二烯丙基二甲基氯化铵的电子自旋共振研究和反应挤出

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In this article we report results from an experimental investigation on reactive extrusion of water-soluble polymers. A polymer system containing homopolymers of diallyldimethylammonium chloride (PolyDADMAC) and acrylamide (PAM) was chosen for this study. Reactive extrusion was performed in a counterrotating, tangential twin screw extruder using glycerol as a plasticizer and 2,5-dimethyl-2,5-di-(t-butylperoxy) hexene-3 (Lupersol 130) as an initiator. The effects of three processing parameters (polyDADMAC/PAM weight ratio, extrusion temperature, and residence time) on grafting efficiency and degree of grafting of polyDADMAC on PAM were examined. Ne found the grafting efficiency of polyDADMAC onto PAM decreased with increasing extrusion temperature, polyDADMAC/PAM weight ratio, and residence time. The degree of grafting of polyDADMAC increased with increasing polyDADMAC/PAM weight ratio, but decreased with increasing extrusion temperature and residence time. The insoluble gel fraction in the extruded copolymer increased with increasing extrusion temperature and residence time, but decreased with increasing polyDADMAC/PAM weight ratio. The chemistry and free radical mechanism of PAM-peroxide and polyDADMAC-peroxide systems were studied for three different peroxides using an electron spin resonance technique. (C) 2000 John Wiley & Sons, Inc. [References: 27]
机译：在本文中，我们报告了对水溶性聚合物进行反应性挤出的实验研究结果。本研究选择了包含二烯丙基二甲基氯化铵（PolyDADMAC）和丙烯酰胺（PAM）均聚物的聚合物体系。在使用甘油作为增塑剂和2,5-二甲基-2,5-二-（叔丁基过氧）己烯-3（Lupersol 130）作为引发剂的反向旋转切向双螺杆挤出机中进行反应性挤出。考察了三个工艺参数（polyDADMAC / PAM重量比，挤出温度和停留时间）对接枝效率以及在PAM上polyDADMAC的接枝度的影响。 Ne发现，随着挤出温度，polyDADMAC / PAM重量比和停留时间的增加，polyDADMAC在PAM上的接枝效率降低。聚DADMAC的接枝度随聚DADMAC / PAM重量比的增加而增加，但随挤出温度和停留时间的增加而降低。挤出共聚物中的不溶性凝胶分数随挤出温度和停留时间的增加而增加，但随聚DADMAC / PAM重量比的增加而减少。使用电子自旋共振技术研究了三种不同的过氧化物的PAM-过氧化物和polyDADMAC-过氧化物体系的化学和自由基机理。 （C）2000 John Wiley＆Sons，Inc. [参考：27]

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