NDLI: Dielectric Properties of Polyether Sulfone/Bismaleimide Resin Composite Based on Nanolumina Modified by Super-Critical Ethanol

Content Provider	Springer Nature Link
Author	Chen, Yufei Li, Zhichao Teng, Chengjun Li, Fangliang Han, Yang
Copyright Year	2016
Abstract	Nano-alumina was chemically modified with super-critical ethanol enabling a surface active coating. Modified nano-alumina was incorporated in polymer blends based on thermoplastic polyether sulfone and thermosetting bismaleimide resin to produce novel nanocomposites designated as SCE-Al$_{2}$O$_{3}$/PES-MBAE. In the SCE-Al$_{2}$O$_{3}$/PES-MBAE nano-composites, the matrix was originally formed from 4,4′-diamino diphenyl methane bismaleimide (MBMI) using the diluents of 3,3′-diallyl bisphenol A (BBA) and bisphenol-A diallyl ether (BBE), while polyether sulfone (PES) was used as toughening agent along with super-critically modified nano-alumina (SCE-Al$_{2}$O$_{3}$) as filler material. The content of SCE-Al$_{2}$O$_{3}$ was varied from 0 wt.% to 6 wt.%. The nano-composites were characterized for their morphological, spectroscopic and dielectric properties. Fourier transform infrared spectroscopy (FT-IR) indicated that ethanol molecules had adhered to the surface of the nano-Al$_{2}$O$_{3}$ in super-critical state. A reaction between MBMI and allyl compound occurred and SCE-Al$_{2}$O$_{3}$ was doped into the polymer matrix. Volume resistivity of the composite initially increased and then decreased. The modification due to SCE-Al$_{2}$O$_{3}$ could overcome the undesirable impact of PES by using a bare minimum level of SCE-Al$_{2}$O$_{3}$. The dielectric constant (ε) and dielectric loss (tan δ) as in the case of volume resistivity were initially increased and then decreased with the content of SCE-Al$_{2}$O$_{3}$ in the composite. The dielectric constant, dielectric loss and dielectric strength of SCE-Al$_{2}$O$_{3}$ (4 wt.%)/PES (5 wt.%)-MBAE nano-composite were 3.53 (100 Hz), 1.52 × 10$^{−3}$ (100 Hz) and 15.66 kV/mm, respectively, which indicated that the dielectric properties of the composite fulfilled the basic requirements of electrical and insulating material. It was evident from the morphological analysis that the SCE-Al$_{2}$O$_{3}$ was evenly dispersed at the nanoscale; for example, the size of SCE-Al$_{2}$O$_{3}$ in SCE-Al$_{2}$O$_{3}$ (4 wt.%)/PES (5 wt.%)-MBAE measured less than 50 nm.
Starting Page	6026
Ending Page	6032
Page Count	7
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	45
Issue Number	11
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2016-08-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bismaleimide polyether sulfone super-critical ethanol nano-Al$_{2}$O$_{3}$ dielectric properties Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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