Synthesis of Novel Polyamide-Hyperbranched Polymers via Self Condensing Atom Transfer Radical Polymerization

Abstract

Novel inimer was synthesized from p-amino phenol via successive preparative methods by using both bromoisobutyrylbromide and acryloyl chloride. The new inimer was well characterized via Infrared Spectra (IR) and ¹ H nuclear magnetic resonance (NMR). New hyperbranched polyamide (H₁) was prepared via Atom Transfer Radical Polymerization (ATRP). Several reaction conditions (ligands, solvents, temperatures, etc.) were studied. However, the N,N,N′,N″,-pentamethyldiethylenetriamine (PMDETA)/CuBr catalytic system showed good results in toluene at 100°C. Three arm star methylmethacrylate (MMA) homopolymers reacted with (H₁) in different percentages to form copolymers with low polydispersity values, especially at 1:115 for poly MMA:H₁. The formed polymers were characterized via Gel Permeation Chromatography (GPC), ¹ HNMR, thermal analyses, and Transmission Electron Microscopy (TEM).

Keywords:

• Hyperbranched polymers
• Inimer
• SC-ATRP
• Star poly MMA
• Thermal analyses

Notes

H₁ = hyberbranched homopolymer, H₂ and H₃ = PMMA-II polymer in various molar ratios for II, PMMA = 50:50 and 115:1, respectively.