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首页> 外文会议>TAPPI(Technical Association of the Pulp and Paper Industry) PLACE(Polymers. Laminations. Adhesives. Coatings. Extrusions) 2006 vol.1 >Impact of Rheological Properties on Melting Rate Calculations
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Impact of Rheological Properties on Melting Rate Calculations

机译：流变性质对熔融速率计算的影响

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摘要

Melting rate calculations have been shown in the literature to be strongly effected by the temperature dependent effects (flow activation energy) of polymer viscosity, especially for amorphous polymers. And this is an important factor in explaining the poor model results for polymers relative to semicrystalline polymers observed in the literature. Over the years a great number of changes in catalyst systems have occurred in the polymerization of "standard" polymers such as polypropylene and polyethylene. These new catalyst systems have appreciable changed the temperature response of the polymers which can have a significant impact on melting rate calculations. This paper will examine the cause of many melting models general failure with amorphous polymers in relationship to existing experimental melting rate calculations which clearly highlight the importance of the temperature sensitivity of the viscosity to accurate melting rate calculations.
机译：熔体速率的计算已在文献中显示出受到聚合物粘度的温度依赖性效应（流动活化能）的强烈影响，特别是对于无定形聚合物。这是解释相对于文献中观察到的聚合物相对于半结晶聚合物的不良模型结果的重要因素。多年来，在“标准”聚合物（例如聚丙烯和聚乙烯）的聚合中，催化剂体系发生了许多变化。这些新的催化剂体系已明显改变了聚合物的温度响应，这可能对熔解速率的计算产生重大影响。本文将研究与现有实验熔解速率计算相关的许多非晶态聚合物熔解模型普遍失效的原因，这清楚地说明了粘度的温度敏感性对精确熔解速率计算的重要性。

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