16519
Homopolymer and copolymer networks that are amorphous at room temperature are flexible and rubbery with elastic moduli ranging from 1 . 8 +/- 0 . 3 to 5 . 2 +/- 0 . 4 MPa and permanent set values as low as 0 . 9 % strain .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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