New Poly(Amide-Imide)s Based on 1,3-Bis[4,4′-(Trimellitimido) Phenoxy] Propane and Hydantoin Derivatives: Synthesis and Properties

Abstract

1, phenoxy] propane (6) as a new monomer containing a trimethylene moiety was synthesized using a three-step reaction. First 1,3-bis [4,4 -nitrophenoxy] propane (3) was prepared by reaction of 4-nitrophenol 1 with 1,3-dibromo propane (2) in DMF. Then dinitro (3) was reduced to 1,3-bis[4,4 -aminophenoxy] propane (4) using a solution of sodium sulfite in ethanol. Finally, monomer (6) was prepared by reaction of one equivalent diamine (4) with two equivalents of trimellitic anhydride (5) in a mixture of acetic acid and pyridine (3:2). Then six new poly(amide-imide)s (8a-f) were synthesized through the polycondensation reaction of diacid (6) with six different derivatives of hydantoin (7a-f) in Nmethyl-2-pyrrolidone, using triphenylphosphite and pyridine as condensing agents. The polycondensation produced a series of novel poly(amide-imide)s in high yields with inherent viscosities between 0.31 and 0.61 dl/g. The resulting poly(amide-imide)s were characterized by elemental analysis, viscosity measurements, thermogravimetric analysis (TGA and DTG), differential scanning calorimetry, solubility tests and FT-IR spectroscopy.

Study on the Thermal Properties and Enzymatic Degradability of Chiral Polyamide-Imides Films Based on Amino Acids

“…Therefore, more and more biodegradable polymers are starting to become a concern for people, especially a polymer that could control the rate of degradation [5,6]. Amino acid-based polyamide-imides (PAIs) are a type of high-performance (HP) materials that combine the thermal resistance and mechanical properties of polyimides, and the easy machinability of PA [7,8], as well as having improved degradation properties [9] and cell compatibility [10]. This is due to the introduction of natural chiral sections, which is obviously of great significance for the development of HP, high-processability, and biodegradable polymer materials.…”

Design and preparation of novel fluorescent polyimides containing ortho-linked units and pyridine moieties

“…They have been widely utilized in the traditional field of gas separation, microelectronics, aerospace devices, integrated electronic circuits, passivation coatings, substrate components, adhesives, composites, and so on [1][2][3][4][5][6][7][8].…”

Synthesis and characterization of new thermally stable and organosoluble polyamides by direct polycondensation

“…Aromatic polymers that contain aryl ether linkages generally have lower glass transition temperatures, greater chain flexibility, and tractability compared to their corresponding polymers without these groups in the chain [14][15][16]. The lower glass transition temperatures and also improved solubility are attributed to the flexible linkages that provide a polymer chain with a lower energy of internal rotation [17].…”