6676
Toward the final goal , PVA chains with narrow polydispersities ( 1 . 1 - 1 . 2 ) and molecular weights of 5 , 10 , and 28 kDa are synthesized via controlled radical polymerization ( RAFT ) .
 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