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A series of poly(benzimidazole sulfone)s (PBSs) and poly(benzimidazole ketone)s (PBKs) containing 5,6-dimethoxy-1,3-dihydro-2H-benzo[d]imidazol-2-one (MBIO) have been synthesized by C-N/C-O coupling with different percentages of three other diphenol monomers under similar conditions. The structure of PBS-MBs and PBK-MBs was confirmed using H-1 NMR and Fourier transform infrared spectroscopies, and X-ray diffraction data revealed that all the polymers are in an amorphous state. Due to the introduction of methoxy, the polymers were more soluble in common aprotic polar solvents. The intrinsic viscosity of the synthesized polymers was measured with an Ubbelohde viscometer, ranging from 0.38 to 1.35 dL g(-1). The MBIO-based polymers have a remarkably good thermal stability with a high glass transition temperature of up to 305.1 ?. Furthermore, the wavelength of maximum fluorescence emission from homopolymers is around 414 nm with emission of blue light in N-methyl-2-pyrrolidone solution (1 mg L-1) and around 530 nm in films. They also showed low dielectric constants (kappa = 2.60-3.10 at 1 MHz) and low water absorption (0.22-0.58%). It was encouraging to discover that these polymers have potential utility for the microelectronics industry, in which good solubility facilitates processing and molding, excellent thermal stability allows devices to be used under harsh conditions, low water absorption prevents device expansion and shrinkage and low dielectric constant is desired to prevent crosstalk between conducting paths. (c) 2023 Society of Industrial Chemistry.
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POLYMER INTERNATIONAL
ISSN: 0959-8103
Year: 2023
Issue: 5
Volume: 72
Page: 532-540
2 . 9
JCR@2023
2 . 9 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:39
JCR Journal Grade:2
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 1
SCOPUS Cited Count: 1
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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