Title: Reactive Polyetherimide Oligomers: Part I. Processability Enhancements in Epoxy Resins

Authors: Dadasaheb V Patil, Nikhil Verghese

DOI: 10.33599/nasampe/c.22.0039

Abstract: Polyimides, in particular polyetherimides (PEIs), are amorphous polymers in high demand due to a balance of performance properties including thermal, chemical resistance, dimensional stability, mechanicals and flame retardance [1]. Hence, these polymers are widely used in various applications such as automotive, aerospace, electrical and electronics. Polyetherimides have also been used to enhance the performance of thermosetting resins but with limited success [2, 3]. Recently, new low molecular weight, reactive polyetherimide oligomers (rPEI) have been developed to help enhance processability and performance of thermoset resins. In this work, the effect of adding telechelic polyetherimide oligomers in epoxy resins was studied. Solubility, viscosity, gel time and modulus at gel point, enthalpy of the curing reaction and exotherm peak of cure were measured to evaluate the processing characteristics of the rPEI modified epoxy systems. These new rPEIs showed improved processability when compared with commercial thermoplastic incumbents like PES or PEI modified epoxy systems. In summary, by using reactive polyetherimide oligomers, formulators can now increase loading of rPEI additive to achieve a better toughness-stiffness balance or to tailor the functional properties of the final composite.

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Conference: CAMX 2022

Publication Date: 2022/10/17

SKU: TP22-0000000039

Pages: 9

Price: $18.00