21645
The Tp of PU - Am increased at higher pH , whereas that of PU - Su increased at lower pH , indicating that ionic charge decreases Tp of PU derivatives by increasing osmotic pressure and by increasing hydrophilicity of the polymer chains .
 Chemical: PU - Am; Chemical: PU - Su
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: PU - Am; Chemical: PU - Su