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Reactive Polyetherimide Oligomers: Part I. Performance robustness of epoxy modified systems


Title: Reactive Polyetherimide Oligomers: Part I. Performance robustness of epoxy modified systems

Authors: Dadasaheb V. Patil, Devendra Bajaj, Prakash Sista, Nikhil Verghese

DOI: 10.33599/nasampe/c.23.0154

Abstract: Polyetherimides (PEIs) are amorphous, high performance engineering thermoplastic polymers. They are characterized by a combination of outstanding thermal, mechanical, chemical resistance, dimensional stability, metal adhesion and flame resistance properties. Therefore, they are widely applied in diverse applications like mobility, aerospace, industrial, healthcare, electrical and electronics. PEI resins have also been evaluated as an additive to enhance the fracture toughness of commonly brittle thermoset systems. Previous investigations into the application of PEIs as toughening agents in thermoset resins have revealed challenges with regard to processability, incorporation into a cross-linked network, and complexities in generating a specific morphology in a cured network. New reactive polyetherimide (rPEI) oligomers have been developed to overcome the above challenges. In this work, we studied performance robustness of rPEI oligomers-toughened epoxy blends over a range of curing conditions. In particular, the effect of cure conditions and formulations on the phase morphology, chemo-rheology, thermal, and mechanical properties were investigated. In summary, we demonstrate that epoxy resins modified with rPEI oligomers exhibit a stable morphology and provide enhancements in flexural modulus, strength, % elongation at break, and fracture toughness. Moreover, incorporation of rPEI oligomers showed improvements in the cure enthalpy, gelation time, and viscosity, while maintaining thermal performance. These advantages in rPEI oligomers modified epoxy systems suggest widespread utility for the material in demanding thermoset composites and adhesives applications.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000154

Pages: 16

Price: $32.00

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