7572
Then , the optimal PVA MMs were synthesized , and the morphology and surface chemical properties were characterized by transmission electron microscopy ( TEM ) , scanning electron microscopy ( SEM ) , and Fourier transform infrared spectroscopy ( FT - IR ) .
 Chemical: PVA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PVA