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https://doi.org/10.1002/app.1993.070470211

has been cited by the following article:

• TITLE: Ultrasonic Mechanical, Dialectical and Morphology Characterizations of Unsaturated Copolyesters and Terpolyesters

  AUTHORS: Momen S. A. Abdelaty

  KEYWORDS: Unsaturated Copolyesters, Terpolyesters, Ultrasonic Mechanical, Dielectric, Morphology

  JOURNAL NAME: Open Journal of Applied Sciences, Vol.7 No.12, December 22, 2017

  ABSTRACT: In a previous study we focused on the synthesis of new family of unsaturated copolyesters and terpolyesters by interfacial condensation polymerization. Here, in this study as complementary work of physical characterizations, we focused on the morphological features using X-ray and SEM investigation. Further, the mechanical properties of solid polymers were also studied by a new technique echo-pulse using ultrasonic impulses. This technique was used for solid polymers to determine the elastic moduli involving, Young’s modulus, shear modulus, bulk modulus and micro-hardness modulus. The statistical relation between different kinds of copolyesters and terpolyesters with Poisson’s ratio (υ) and micro-hardness were shown. The dielectric constant (?) and the electrical resistance (Rp) of the solid copolyesters and terpolyesters including aliphatic, aromatic and azo group in the main chain have been studied at room temperature. Moreover, the relation between frequency and dielectric constant for the selective polymers has been also illustrated.