27451
A fibrillar morphology was obtained , compared to the featherless pristine films , via solvent annealing the films of a series of derivatives of poly ( 3 - alkylthiophene ) s ( P3ATs ) : poly ( 3 - dodecylthiophene ) ( P3DDT ) , poly ( 3 , 3 ''' - didodecyl - quaterthiophene ) ( PQT12 ) , and poly ( 2 , 5 - bis ( 3 - dodecylthiophen - 2 - yl ) thieno [ 3 , 2 - b ] thiophene ) ( pBTTT12 ) .
 poly ( 3 - alkylthiophene ) s, P3ATs, poly ( 3 - dodecylthiophene ), P3DDT, poly ( 3 , 3 ''' - didodecyl - quaterthiophene ), PQT12, poly ( 2 , 5 - bis ( 3 - dodecylthiophen - 2 - yl ) thieno [ 3 , 2 - b ] thiophene ), pBTTT12
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 poly ( 3 - alkylthiophene ) s, P3ATs, poly ( 3 - dodecylthiophene ), P3DDT, poly ( 3 , 3 ''' - didodecyl - quaterthiophene ), PQT12, poly ( 2 , 5 - bis ( 3 - dodecylthiophen - 2 - yl ) thieno [ 3 , 2 - b ] thiophene ), pBTTT12