6003
The phase content , in particular the β-phase amount , within the semi-crystalline PVDF films was determined as a function of processing parameters using the FTIR method .
 phase, as, parameters, FTIR
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:
 phase, as, parameters, FTIR