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Home  >  Journal list  >  Polymer Journal  >  Vol.45  No.6 (2013)  >  pp.622-630

Polymer Journal
<<Previous article Vol.45  No.6 (2013)   pp.622 - 630 Next article>>

Ionic liquids in the synthesis of high-performance fluorinated polyamides with backbones containing derivatives of imidazole and carbazole rings

Mousa Ghaemy1, Marjan Hassanzadeh1, Seyed Mojtaba Amini Nasab1 and Mehdi Taghavi1
1Polymer Chemistry Research Laboratory, Department of Chemistry, University of Mazandaran, Babolsar, Iran

A series of new organosoluble poly(amide-ether-imidazole)s with different functional groups, such as flexible ether linkages, substituted imidazole and carbazole rings, and electron withdrawing CF3 groups, were synthesized from a new diamine and various dicarboxylic acids using two methods: (1) direct polycondensation with triphenyl phosphite (TPP) as an activating agent, N-methyl-2-pyrrolidone (NMP), pyridine (Py) and LiCl; and (2) direct polycondensation using ionic liquids (ILs) and TPP without Py, LiCl or NMP. Room temperature ILs containing anions such as Br, BF4 and PF6 with symmetrical 1,3-dialkylimidazolium cations were prepared and used as polycondensation media. The polymers were obtained with good yields in ILs with moderate viscosities (0.34–0.62dlg−1) in a shorter reaction time (2.5 vs 12h) than in NMP. All of the polymers were amorphous in nature and showed excellent solubility in amide-type polar aprotic solvents. They showed good thermal stability with glass transition temperatures (Tg) between 162 and 303°C and 10% weight loss temperatures of 388 and 421°C in O2 and N2 atmospheres, respectively. These polymers showed blue fluorescence emission upon irradiation with ultraviolet light and are candidates for applications in electroluminescent devices.


Keyword:
fluorinated polymers; high-performance polymers; ionic liquids; polyamides; thermal stability

Received: January 01, 2012 , Revised: October 22, 2012
Accepted: October 23, 2012 , Published online: January 23, 2013
© 2013 The Society of Polymer Science, Japan

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