5709
The study demonstrated that the chemical functionality and the thermal properties of the printed PA 12 parts and the glass bead composite , were similar .
 thermal properties, PA, glass bead, composite
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, PA, glass bead, composite