116038-58-5Relevant academic research and scientific papers
Polyester-amides with liquid-crystalline properties
Sava, Ion
experimental part, p. 381 - 387 (2010/06/19)
Some new polyester-amides were prepared by polycondensation reaction of 1,8-diaminooctane or 1,12- diaminododecane with diacid chlorides containing preformed ester groups. These polymers were characterized by DSC, polarized light optical microscopy, X-ray diffractions, FTIR and GPC. They show thermotropic liquid crystalline properties and are easily soluble in N-methylpyrrolidinone.
Poly(1,3,4-oxadiazole-ester-amide)s
Sava, Ion,Iosip, Mariana-Dana,Bruma, Maria
, p. 515 - 523 (2007/10/03)
New aromatic poly (1,3,4-oxadiazole)s containing both amide and ester groups in the main chain have been synthesized and their properties have been determined and compared with those of wholly aromatic polyamides and poly(1,3,4-oxadiazole)s. These polymers show good thermal stability, with the initial decomposition temperature around 360°C and the glass transition temperature in the range 190°C-270°C. They are easily soluble in certain solvents such as N-methylpyrrolidinone, N,N′-dimethylacetamide and N,N′-dimethylformamide, and can be cast from solutions into thin flexible films.
Fluorinated poly(benzoxazole-ester)s
Sava, Ion,Hamciuc, Corneliu,Bruma, Maria,Hamciuc, Elena
, p. 1161 - 1166 (2007/10/03)
New poly(benzoxazole-ester)s were prepared by polycondensation of bis(o-aminophenol), such as 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, with diacid chlorides containing ester groups. The soluble polymer precursor resulting from the first step of polycondensation in N-methylpyrrolidinone (NMP) at low temperature was processed into thin flexible films, which were then thermally treated to reach the fully cyclized structure of poly(benzoxazole-ester)s, as observed by infrared spectra.
