13969
In comparison to the homopolymers P3HP and P4HB , incorporation of block microstructure resulted in the lowering of Tm , block copolymers were revealed with higher Young ' s modulus , yield strengths , and tension strengths much better than the previously reported random copolymers of similar compositions .
 Chemical: P3HP; Chemical: P4HB
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: P3HP; Chemical: P4HB