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首页> 外文期刊>Polymers for advanced technologies >Aging of polyamide 12 in oil at different temperatures and pressures
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Aging of polyamide 12 in oil at different temperatures and pressures

机译：在不同温度和压力下的聚酰胺12在油中老化

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Polyamide 12 (PA 12) is an alternative to steel in the manufacture of pipes for transporting oil and gas. However, polyamide pipes suffer degradation, triggered by factors such as temperature and exposure to chemicals. In this research, the authors studied the variation of mechanical and thermal properties and of structural characteristics of a PA 12 grade after aging in oil. The aging process lasted 3360h. It was made at ambient temperature and at 70 degrees C, under pressures of 1 and 17atm. At ambient temperature and atmospheric pressure, PA 12 increased in volume, weight and rigidity, and decreased in damping. At 70 degrees C and atmospheric pressure, there was a smaller increase in volume and weight. PA 12 samples also darkened, showed an increase in crystallinity and damping, and a decrease in rigidity. At 70 degrees C and 17atm, a decrease in volume and weight was observed; the samples also darkened, increased in crystallinity and rigidity, and decreased in damping. In all aging conditions, the results of the thermal analysis and the analysis of functional groups showed that the chemical structure of the material was not significantly changed. According to the results, PA 12 has a good resistance to aging under these conditions. Copyright (c) 2017 John Wiley & Sons, Ltd.
机译：聚酰胺12（PA 12）是制造用于输送油和气体的管子中的替代方案。然而，聚酰胺管遭受降解，由温度和化学品如温度和暴露的因素触发。在这项研究中，作者研究了在油中老化后12级的机械和热性能的变化和结构特征。老化过程持续3360小时。它是在环境温度和70℃下制造的，在1和17Atm的压力下。在环境温度和大气压下，PA 12增加体积，重量和刚性，减阻下降。在70摄氏度和大气压下，体积和重量较小。 PA 12样品也变暗，表明结晶度和阻尼的增加，并且刚性降低。在70摄氏度和17ATM时，观察到体积和重量的降低;样品也变暗，结晶度和刚性增加，并且阻尼下降。在所有衰老条件下，热分析结果和官能团分析表明，材料的化学结构没有显着改变。根据结果​​，PA 12在这些条件下具有良好的抗衰老。版权所有（c）2017 John Wiley＆Sons，Ltd。

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