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Increasing the weight fraction of mCNCs causes an uncommon abrupt transition from PBD - dominated soft materials to significantly reinforced mCNC - dominated mechanical properties , suggesting that the intercalated self - assembled mCNC / PBD domains percolate in PBD upon passing 30 - 35 wt % of mCNCs .
 Chemical: PBD; Chemical: PBD; Chemical: PBD
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: PBD; Chemical: PBD; Chemical: PBD