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首页> 外文会议>The Eighth International Conference on Additives '99 March 22-24, 1999 San Francisco, California >Evaluation of magnesium hydroxides as potential basic stabilizers for vinylidene chloride polymers
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Evaluation of magnesium hydroxides as potential basic stabilizers for vinylidene chloride polymers

机译：氢氧化镁作为偏二氯乙烯聚合物潜在的碱性稳定剂的评估

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摘要

Vinylidene choloride copolymers are of immense importance to the barrier plactic packaging industry. They display good barrier to both oxygen (to prevent spilage of the package food item) and flavor and aroma molecules (to prevent "scalping" of flavor ingredients during storage). However, at melt process temperatures these polymers undergo degradative dehydrochlorination. Hydrogen Choloride must be trapped to preventinteraction with the walls of process equipment to form metal halides which may act as Lewis acids to catalyze and accelerate the degradation process. The avilability of a new high surface area magnesium hydroxide from Dead Sea periclase offered the potential for the development of an effective stabilizer for vinylidene chloride copolymers. The effectiveness of this material for such stabilization has been compared to that afforded by other more conventional, commercially-available magnesium hydroxides.
机译：亚乙烯基氯化物共聚物对于阻隔实用包装工业具有极其重要的意义。它们对氧气（以防止包装食品溢出）和风味和香气分子（以防止在储存过程中风味成分“剥落”）表现出良好的阻隔性。然而，在熔融工艺温度下，这些聚合物经历降解性脱氯化氢。必须捕获氯化氢，以防止与加工设备的壁发生相互作用而形成金属卤化物，这些金属卤化物可以充当路易斯酸来催化和加速降解过程。死海钙镁矿的新型高表面积氢氧化镁的适用性为开发用于偏二氯乙烯共聚物的有效稳定剂提供了潜力。已经将该材料用于这种稳定化的有效性与其他更常规的可商购的氢氧化镁所提供的有效性进行了比较。

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