Microwave-assisted synthesis and characterization of heterocyclic, and optically active poly(amide-imide)s incorporating L-amino acids

2008 ◽  
Vol 19 (12) ◽  
pp. 1710-1719 ◽  
Author(s):  
Abdol R. Hajipour ◽  
Saeed Zahmatkesh ◽  
Arnold E. Ruoho
Amino Acids ◽  
2010 ◽  
Vol 41 (2) ◽  
pp. 485-494 ◽  
Author(s):  
Ali Reza Alborzi ◽  
Saeed Zahmatkesh ◽  
Karim Zare ◽  
Javad Sadeghi

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Saeed Zahmatkesh ◽  
Abdol Reza Hajipour

AbstractPyromellitic dianhydride (1) was reacted with L-leucine (2) to result in [N,N'-(pyromellitoyl)-bis-L-leucine diacid] (3). This compound (3) was converted to N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride (4) by reaction with thionyl chloride. The microwave-assisted polycondensation of this diacid chloride (4) with polyethyleneglycol-diol (PEG-200) and/or three synthetic bisphenols furnish a series of new PEIs and Co-PEIs in a laboratory microwave oven (Milestone). The resulting polymers and copolymers have inherent viscosities in the range of 0.31- 0.53 dl g-1. These polymers are optically active, thermally stable and soluble in polar aprotic solvents such as DMF, DMSO, NMP, DMAc and sulfuric acid. All of the above polymers were fully characterized by IR spectroscopy, 1H NMR spectroscopy, elemental analyses, specific rotation and thermal analyses. Some structural characterizations and physical properties of these optically active PEIs and Co-PEIs are reported.


2010 ◽  
Vol 12 (1) ◽  
pp. 99-104 ◽  
Author(s):  
Huifen Zhou ◽  
Ran Yi ◽  
Junhui Li ◽  
Yuan Su ◽  
Xiaohe Liu

2019 ◽  
Vol 73 ◽  
pp. 366-376 ◽  
Author(s):  
Marek Piątkowski ◽  
Julia Radwan-Pragłowska ◽  
Łukasz Janus ◽  
Dariusz Bogdał ◽  
Dalibor Matysek ◽  
...  

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