制冷剂/压缩机油与PA6的相容性研究

采用红外光谱分析和热重分析研究了不同规格PA6(聚酰胺6或尼龙6)的区别,不同规格PA6的红外谱图有细微区别,PA6在350℃之前的热失重量不同,可见其增塑剂等小分子的含量不同,这不但影响PA6的耐热老化性能,还会明显影响PA6的挤出工艺和使用性能.通过PA6在制冷剂、压缩机油、制冷剂/压缩机油等介质中的热老化测试和测...

Research on the Compatibility Between Refrigerant/CompressorLubricants and PA6

The differences of PA6(Polyamide 6 or Nylon 6)materials of different specifications are analyzed and studied with infrared spectroscopy and thermogravimetric analysis.The infrared spectra of different PA6 materials are slightly different,thermal weight loss of PA6 before 350℃is different,so it can be seen that the content of plasticizer and other small molecules is different,which not only affects the thermal aging performance of PA6,but also significantly affects the extrusion process and service performance of PA6.The volume changes and thermogravimetric curves of different PA6 are compared through the aging test of PA6 in refrigerant,compressor,refrigerant/compressor oil and the thermogravimetric analysis of the tested samples.The results show that the compatibility of PA6 of different specifications with refrigerant/compressor oil is different.The same PA6 varies in volume in different refrigerants/compressor oils.The volume change rate is the lowest in R1234yf/POE(2,3,3,3-tetrafluoropropylene/polyol)systems.Moreover,the refrigerant plays a decisive role in the influence of refrigerant/compressor oil systems on the performance of PA6.