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The molar SuA / AzA ratio was varied from 4 : 1 to 1 : 4 , and the chemical structure and molecular characteristics of resulting ( co ) polyesters were characterized by NMR and SEC , whereas thermal properties and crystallinity were studied by differential scanning calorimetry ( DSC ) , dynamic mechanical thermal analyses ( DMTA ) , and X - ray diffraction ( XRD ) .
 Chemical: SuA; Chemical: AzA; Chemical: ( co ) polyesters
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: SuA; Chemical: AzA; Chemical: ( co ) polyesters