Exploring the optical and dielectric properties of bifunctional and trifunctional epoxy polymers

POLYMER

卷:228

Article

Jdidi, Haythem^1,2  Fourati, Najla²  Zerrouki, Chouki²  Ibos, Laurent³  Fois, Magali³  Guinault, Alain⁴  Jilani, Wissal^1,5  Guermazi, Samir¹  Guermazi, Hajer¹ 

[1] Sfax Univ Tunisia, Fac Sci Sfax, Phys Insulators & Semiinsulator Mat Res Unit, BP 1171, Sfax 3038, Tunisia

[2] CNRS, SATIE, UMR 8029, ENS Paris Saclay,cnam, 292 Rue St Martin, F-75003 Paris, France

[3] Paris Est Creteil Univ, CERTES OSU Efluve, 61 Ave Gen Gaulle, F-94010 Paris, France

[4] CNRS, UMR 8006, PIMM, Arts & Metiers ParisTech,Cnam, 151 Bd Hop, F-75013 Paris, France

[5] King Khalid Univ, Dept Phys, Fac Sci & Arts Dhahran Janoub, P O Box 9004, Abha 61421, Saudi Arabia

关键词: Epoxy-based polymers;    Dielectric properties;    Direct and indirect optical bandgap;    Relaxation;    Activation energy;    Modeling;   

DOI  :  10.1016/j.polymer.2021.123882

来源: Elsevier

【 摘 要 】

Two polymers were prepared from diglycidyl ether of bisphenol A (DGEBA) and triglycidyl p-aminophenol (TGAP) epoxy resins, using the same hardener diethylenetriamine (DETA). The obtained polymers were compared in terms of structural, optical, mechanical, thermal and dielectric properties. Dielectric spectroscopy and dynamic mechanical analysis indicated the presence of dipolar dielectric relaxations in both polymers, and interfacial one only for TGAP/DETA, which is consistent with XRD findings. Different approaches were considered to fit electrical modulus and conductivity and to estimate the relaxation times and activation energies according to temperature. For optical measures, a novel result processing approach is proposed for an accurate determination of the polymers bandgap and for highlighting the existence of additional energy transition level for TGAP. Results indicate that this polymer could be a potential candidate for use as a protective film and as UV/ blue-light filter for screens and windows.

【 授权许可】

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