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首页> 外文期刊>Journal of Applied Polymer Science >REACTIVE PROCESSING OF LLDPES IN COUNTERROTATING NONINTERMESHING TWIN-SCREW EXTRUDER .3. METHODS OF PEROXIDE ADDITION
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REACTIVE PROCESSING OF LLDPES IN COUNTERROTATING NONINTERMESHING TWIN-SCREW EXTRUDER .3. METHODS OF PEROXIDE ADDITION

机译：互不干扰的双螺杆挤出机中LLDPES的反应过程.3。过氧化物的添加方法

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An ethylene-octene linear low-density polyethylene (LLDPE) was treated with peroxide in a reactive extrusion system. A counterrotating nonintermeshing twin-screw extruder (System 2) was contrasted with a corotating intermeshing twin-screw machine (System 1). In System 2, the peroxide solution was pumped into the melted polymer, while it entered with the polymer pellets in the feed section of System 1. Molecular structure changes and the theological behavior of peroxide-modified resins are similar in both operations but System 2 is much more effective. Much lower peroxide levels were needed in System 2. However, reactions in this setup were also more difficult to control. The presence of microgel was clearly evident in System 2 products but not in those made in System 1. The results of such reactive extrusion processes depend critically on the method of the peroxide feed and mixing conditions. Reaction conditions that favor optimum economy and peroxide efficiency are those which may compromise product homogeneity. (C) 1996 John Wiley & Sons, Inc. [References: 19]
机译：乙烯-辛烯线性低密度聚乙烯（LLDPE）在反应挤出系统中用过氧化物处理。将反向旋转的无啮合双螺杆挤出机（系统2）与同向旋转的无啮合双螺杆挤出机（系统1）进行了对比。在系统2中，将过氧化物溶液泵入熔融的聚合物中，同时将其与聚合物颗粒一起进入系统1的进料区。在两种操作中，过氧化物改性树脂的分子结构变化和神学行为相似，但系统2为更有效。系统2需要低得多的过氧化物水平。但是，此设置中的反应也更难以控制。在系统2的产品中明显可见微凝胶的存在，而在系统1的产品中则不明显。这种反应性挤出过程的结果关键取决于过氧化物进料的方法和混合条件。有利于最佳经济性和过氧化物效率的反应条件是可能损害产物均质性的那些条件。 （C）1996 John Wiley＆Sons，Inc. [参考：19]

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