Hydrothermal aging behavior of polyamide 6 (PA6) and its composites (PA6/calcium carbonate [CaCO₃] and PA6/short glass fiber [SGF]) was systematically investigated using infrared spectroscopy, dynamic mechanical analysis, differential scanning calorimetry, and wide‐angle X‐ray diffraction as well as mechanical measurements. It was found that the water absorption mechanism is strongly affected by the presence of fillers. SGF‐reinforced PA6 composites absorb less water than PA6 and PA6/CaCO₃ composites under the same hydrothermal condition. PA6 with 10 wt% SGF exhibits great resistance to hydrothermal aging, which is attributed to the higher crystallinity and larger α‐form fraction.

中文翻译：

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纳米粒子和玻璃纤维对聚酰胺6水热老化的影响

使用红外光谱，动态力学分析，差示扫描量热法和广角分析系统地研究了聚酰胺6（PA6）及其复合材料（PA6 /碳酸钙[CaCO ₃ ]和PA6 /短玻璃纤维[SGF]）的水热老化行为。X射线衍射以及机械测量。发现吸水机理受填料的存在强烈影响。在相同的水热条件下，SGF增强的PA6复合材料吸收的水分比PA6和PA6 / CaCO ₃复合材料吸收的水分少。SGF含量为10 wt％的PA6具有较高的抗水热老化性能，这归因于其较高的结晶度和较大的α-形式分数。