Radiation crosslinking of linear polyethyleneimine‐based nanoparticles grafted to poly(glycidyl methacrylate) via trimethylolpropane triacrylate as potential electronic packaging material

Abstract

Linear polyethyleneimine (L-PEI)-based nanoparticles were synthesized via hydrolysis of poly-2-methyl-2-oxazoline (PMeOx), which was prepared by cationic ring-opening polymerization of the oxazoline five-membered ring. Herein, a kinetic study of the ring-opening polymerization reaction is discussed. The nuclear magnetic resonance spectrum of PMeOx verified the presence of repeating units and terminal groups in the polymer's structure. Molar ratios of PEI and PMeOx were characterized using size exclusion chromatography with low-polydispersity polymer chains as the controlled polymerization reaction. PEI and PMeOx exhibited narrow particle size distribution with hydrodynamic radii of 89 and 67 nm, respectively, as determined via dynamic light scattering analysis. In addition, atomic forces and scanning electron microscopy were used to investigate the topography of the PEI thin films. Poly(glycidyl methacrylate) P(GMA) was grafted onto a PEI chain in the presence of trimethylolpropane triacrylate (TMPTA) as the crosslinking agent to synthesize the P(GMA-PEI-TMPTA) tripolymer via free radical polymerization using gamma irradiation. The thermal characterization of the P(GMA-PEI-TMPTA) tripolymer was conducted using thermogravimetric analysis and differential scanning calorimeter. Generally, the thermal stability of the P(GMA-PEI-TMPTA) tripolymer was improved at low-glycidyl methacrylate concentrations. The prepared tripolymer could be used as effective packaging materials for electronics industries.

Polypropylene based bio-composites for packaging materials: Physico-mechanical impacts of prepared hyper-branched polyamidoamine and gamma-irradiation

“…The intensity of the N–H stretch of the primary amine band of hyperbranched polyamidoamine appeared in the spectra of PP/Polyamidoamine Figure 3(c). 38 The disappearance of the absorption peak at 1730 cm −l of the carbonyl group of polyamidoamine indicates a successful combination of the PP matrix with polyamidoamine.…”

Sorption‐based treatment of flexographic printing packaging materials ink waste by synthesis of tri‐copolymers via gamma irradiation

“…Polyethyleneimine (PEI) was prepared according to our previous work. 17 DMF, ethanol was used as received without further purification. Flexographic waste ink was collected from local printing converter (Rotographia Masr Co.) as solvent base (ethyl acetate) printing inks.…”

“…However, the presence and extent of macroradicals on PEI would depend on various factors such as the concentration of free radicals, reaction conditions, and the nature of the polymer chains involved. 17,18,19…”

“…In this case, the presence of additional peaks or shifts in peak position that are not present in the expected PEI spectrum suggests hydrolysis reactions have occurred in the polymer structure. 12 A peak around 2990 cm À1 , corresponds to the C-H stretching vibration of the methylene groups in the PEI backbone. A peak around 1730 cm À1 , corresponds to the C=O stretching vibration of the acrylate groups in PEGDA and the ester groups in GMA.…”

“…Tri-copolymers, with their unique chemical structure composed of three different monomers, offer diverse properties suitable for various applications. 12 Gamma irradiation synthesis provides several advantages, including a fast and efficient process, high product quality, and reduced environmental impact. 13,14,15,16 This paper aims to present a comprehensive overview of the current state of the art in eliminating printing ink waste from packaging materials through gamma irradiation synthesis of tri-copolymers.…”