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Yin Lixin, Wang Fengchu. TOUGHENING OF THERMOSETS WITH HIGH MODULAR POLYMERS Ⅰ.THE FRACTURE ENERGY AND THE TOUGHENING MECHANISM OF EPOXY-PSF SYSTEM[J]. Acta Materiae Compositae Sinica, 1991, 8(3): 37-42.
Citation: Yin Lixin, Wang Fengchu. TOUGHENING OF THERMOSETS WITH HIGH MODULAR POLYMERS Ⅰ.THE FRACTURE ENERGY AND THE TOUGHENING MECHANISM OF EPOXY-PSF SYSTEM[J]. Acta Materiae Compositae Sinica, 1991, 8(3): 37-42.
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TOUGHENING OF THERMOSETS WITH HIGH MODULAR POLYMERS Ⅰ.THE FRACTURE ENERGY AND THE TOUGHENING MECHANISM OF EPOXY-PSF SYSTEM

  • Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China

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  • Received Date: June 13, 1990
    Abstract
  • In this paper the fracture energy GIC of epoxy-PSF system has been tes- ted with TDCB (Tapered-double-cantilever beam) samples.The results show that this system not only has a high GIC value, but also GIC and GIa are almost equal.Comparing the GIC temperature char with dynamic mechanical properties(DMA),we find that the toughness of the system relates to its visco- elastic properties.From the SEM photographs,a structure that the tenacious polymer as an unint}rruptad phase, wraps thermosetting spherule, i.e.a"networ- kmicrospherule" structure was observed.It is this structure that makes the GIC of epoxy-PSF system high.
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