Tailoring Thermal and Electrical Properties of Jeffamine Segmented Polyetherimide Composite Films Containing BaTiO3 particles

Abstract

The continuous advancement of materials science has highlighted the ongoing need for additional studies on the main composite materials topics, particularly in the field of multifunctional nano-composites, towards improving their capability to meet multifaceted requirements in order to stimulate both scientific and technological development. In this study, we report the preparation and characterization of polyetherimides (PEIs) derived from 4,4′-(4,4′-isopropylidenediphenoxy) bis (phthalic anhydride) following a two-step polycondensation reaction using either 4,4′-(1,3-phenylenedioxy) dianiline, or Jeffamine ED-600 as comonomers, or a mixture of the two diamines. Based on the PEI containing flexible Jeffamine segments, polymer composite films were developed by incorporating BaTiO3 particles. The chemical structure and morphology of the composite films were investigated by FTIR spectroscopy and scanning electron microscopy. Thermal properties were determined by thermogravimetric analysis and differential scanning calorimetry. The influence of Jeffamine segments on the thermal decomposition process was investigated by TG/MS/FTIR measurements under air and nitrogen atmospheres. Based on the obtained data, the thermal decomposition mechanism was established and is discussed in accordance with the chemical structures of the polymers. The surface properties of the PEI and PEI-composite films were characterized by performing contact angle measurements. The addition of BaTiO3 increased the wettability of the surfaces. The dielectric characteristics of polymer composite films were investigated by broad band dielectric spectroscopy measurements. It was noticed that the addition of BaTiO3 nanoparticles to the copolymer matrix gradually enhanced the dielectric constant of the composites.

Moisture-cured solvent free silylated poly(ether-urea) pressure-sensitive adhesives (PSAs) for use as skin adhesives for application in transdermal drug delivery (TDD)

“…Notably, all variants demonstrated identical degradation profiles, with an observed thermal decomposition temperature ( T d ) ∼380 °C. This loss was attributed to scission reactions of the poly(propylene glycol) backbone, aligning with the degradation temperature of free Jeffamine® D-4000 as reported by Hamciuc et al 42 Due to the small IPDI hard domains, only the decomposition of the longer soft segments was noticed. 43…”

“…Longer polymer chains lead to higher molecular weight between the crosslinks lowering the crosslink density which translates to lower G 0 , optimum wetting and higher adhesion. 42 In parallel, the increase in the number of urea groups between crosslinking points might also be a contributing factor to the increased adhesion due to increased hydrogen bonding. In parallel, the increase in the number of urea groups between crosslinking points might also be a contributing factor to the increased adhesion due to increased hydrogen bonding.…”

Tailoring the properties of semi-aromatic copolyimides through structural manipulation towards energy-storage applications

“…A comparison with the reported T g data on related polyimides evidenced a good agreement in regard to both Jeffamine molecular weight and molar ratio between the aromatic and aliphatic diamines. 29,45–47…”

“…A comparison with the reported T g data on related polyimides evidenced a good agreement in regard to both Jeffamine molecular weight and molar ratio between the aromatic and aliphatic diamines. 29,[45][46][47] Thermogravimetric measurements. The thermogravimetric analysis (TGA) of copolyimides performed in an inert atmosphere on free-standing films revealed a dependence on the aliphatic Jeffamine segment, similar to DSC measurements.…”

Development of New Polyimide/Spirulina Hybrid Materials: Preparation and Characterization

“…Recently, polyimides have found applicability in the biomedical field [15][16][17][18]. Polymer composites, including composite polyimides, represent a class of materials renowned for their exceptional versatility and tailored properties [12,[19][20][21][22][23][24][25]. Composite polyimides are formed by incorporating reinforcing materials, such as fibers or particles, into a polyimide matrix.…”