8136
Chemical and thermal properties of the PA12 parts were also evaluated using attenuated total reflection infrared spectroscopy ( ATR FT-IR ) , x-ray photoelectron spectroscopy ( XPS ) and differential scanning calorimetry ( DSC ) .
 thermal properties, PA12, reflection, infrared, FT-IR, x-ray photoelectron spectroscopy, XPS, scanning, DSC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 thermal properties, PA12, reflection, infrared, FT-IR, x-ray photoelectron spectroscopy, XPS, scanning, DSC