1102-92-7Relevant articles and documents
Preparation and properties of polybenzoxazole-based gas separation membranes: A comparative study between thermal rearrangement (TR) of poly(hydroxyimide) and thermal cyclodehydration of poly(hydroxyamide)
Kushwaha, Ashish,Dose, Michelle E.,Smith, Zachary P.,Luo, Shuangjiang,Freeman, Benny D.,Guo, Ruilan
, p. 81 - 93 (2015)
This comparative study focuses on the cyclodehydration reaction of poly(hydroxyamide)s (PHAs) and the thermal rearrangement (TR) reaction of aromatic poly(hydroxyimide)s (APIs) to produce polybenzoxazoles (PBOs) for application as gas separation membranes
Novel synthetic method for 2,2-bis(4-aminophenyl)hexafluoropropane
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, (2018/09/08)
The invention relates to a novel synthetic method for 2,2-bis(4-aminophenyl)hexafluoropropane. The novel synthetic method is mainly to solve problems like high hazards, large product separation and purification difficulties, expensive raw materials and harsh reaction conditions in a traditional synthetic method. The method comprises the following steps: with 2,2-bis(4-methylphenyl)hexafluoropropane as a raw material, oxidizing the 2,2-bis(4-methylphenyl)hexafluoropropane into 2,2-bis(4-carboxylphenyl)hexafluoropropane through chromium trioxide, then carrying out an acyl chlorination reaction,introducing ammonia gas, carrying out an amidation reaction so as to obtain 2,2-bis(4-formamidophenyl)hexafluoropropane, and carrying out a Hoffman reaction in a sodium hypochlorite solution so as toobtain a target product. The method provided by the invention has the advantages of cheap and easily-available raw materials, mild reaction conditions, easy industrialization, etc.
Radical-forming polyamides for self-decontamination coatings
Damaceanu, Mariana-Dana,Rusu, Radu-Dan,Bruma, Maria
, p. 799 - 806 (2013/05/09)
Design and synthesis of thermally stable polyamides with improved solubility based on an asymmetrical aromatic diamine containing phenoxy substituted benzophenone segment was the main objective of this work. These polymers were easily soluble at room temperature in polar aprotic solvents and even in less polar solvents, such as tetrahydrofuran. The polymers showed excellent thermal stability, up to 385°C, and exhibited glass transition in the range of 225-256°C. All the polymers emitted an intense blue light upon irradiation with UV light, due to the emission from the benzophenone chromophore. The free-standing films having the thickness in the range of tens of micrometers obtained from these polymers were flexible, tough, and maintained their integrity after repeated bendings. To investigate the radical-forming ability of the polyamides for decomposing surrounding harmful materials, degradation of methylene blue by the polymer films was studied.
Blue fluorescent polyamides containing naphthalene and oxadiazole rings
Damaceanu, Mariana-Dana,Rusu, Radu-Dan,Nicolescu, Alina,Bruma, Maria
body text, p. 893 - 906 (2012/01/12)
New polyamides containing 1,3,4-oxadiazole and naphthalene rings were prepared by low-temperature solution polycondensation reaction of a new diamine containing preformed oxadiazole ring with various aromatic diacid chlorides. Elemental analysis, mass, infrared, and nuclear magnetic resonance spectroscopy were used to confirm the structure of the monomers and corresponding polymers. The thermal stability and glass transition temperatures of these poly(oxadiazole-amide)s were measured and compared with those of related polymers. Their good solubility allows them to be processed in very thin films with smooth surfaces, without pinholes or cracks, when studied by atomic force microscopy. Upon irradiation with UV light the polymers showed photoluminescence maxima in the blue spectral range, both in solution and in solid state. Cyclic voltammetry (CV) was performed in order to obtain information about the electrochemical stability and reversibility of the redox processes of these polyamides. The highest occupied molecular orbital and the lowest unoccupied molecular orbital energy levels, and electrochemical and optical band gap values were calculated by using the results of CV and UV/vis, respectively, showing very good electron and hole injection and transport characteristics. These properties make the present polymers suitable for application in electroluminescent devices.
Study of fluorinated poly(1,3,4-oxadiazole-amide)s
Dǎmǎceanu, Mariana-Dana,Brumǎ, Maria
, p. 815 - 830 (2007/10/03)
Three aromatic fluorinated poly(1,3,4-oxadiazole-amide) were synthesized by solution polycondensation reaction of aromatic diamines containing preformed 1,3,4-oxadiazole ring with a diacid chloride incorporating hexafluorisopropylidene unit. All polymers
