Study of Bis-A Epoxy Blends and Bis-F Epoxy Blends Along with Impact on Curing and Mechanical Properties

The aim of this work was the development of a thermoplastic/thermosetting combined system with a novel production technique. A poly(caprolactone) (PCL) structure has been designed and produced by fused filament fabrication, and impregnated with an epoxy matrix. The mechanical properties, fracture toughness, and thermal healing capacities of this blend (EP-PCL(3D)) were compared with those of a conventional melt mixed poly(caprolactone)/epoxy blend (EP-PCL). The fine dispersion of the PCL domains within the epoxy in the EP-PCL samples was responsible of a noticeable toughening effect, while in the EP-PCL(3D) structure the two phases showed an independent behavior, and fracture propagation in the epoxy was followed by the progressive yielding of the PCL domains. This peculiar behavior of EP-PCL(3D) system allowed the PCL phase to express its full potential as energy absorber under impact conditions. Optical microscope images on the fracture surfaces of the EP-PCL(3D) samples revealed that during fracture toughness tests the crack mainly propagated within the epoxy phase, while PCL contributed to energy absorption through plastic deformation. Due to the selected PCL concentration in the blends (35 vol %) and to the discrepancy between the mechanical properties of the constituents, the healing efficiency values of the two systems were rather limited.

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Processibility and Thermo-Mechanical Properties of Epoxy as Reactive Plasticizer of Polyetherimide

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.264.228 ◽

2017 ◽

Vol 264 ◽

pp. 228-231

Author(s):

Nasuha Marzuki ◽

Muhamad Amirul Ashraf Mohd Alias ◽

Arjulizan Rusli ◽

Zulkifli Ahmad

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Scanning Electron Microscopy ◽

Differential Scanning Calorimetry ◽

Early Stage ◽

Scanning Calorimetry ◽

Two Phase ◽

Dispersed Particles ◽

Epoxy Blends ◽

Scanning Electron

A relatively new way to improve processibility thermoplastics is via the use of crosslinkable monomers which can act as reactive plasticizers and reduce the viscosity in the early stage of processing. The monomers can polymerize and phase separate during final stage of processing thus recovering the original thermoplastics properties. In this work, the applicability of epoxy as reactive plasticizer for polyetherimide (PEI) was investigated. The properties of PEI/epoxy blends without and with curative were studied in order to determine the effect of the monomer on the processibility of the PEI and the thermo-mechanical properties of cured blends. Differential Scanning Calorimetry on blends without curative indicated single glass transition temperature (Tg) at high PEI content suggesting miscibility of the system and plasticization of PEI in the presence of epoxy while cured blends indicated two Tg due to phase separation. Scanning electron microscopy of the cured blends indicated two phase morphology with PEI dispersed particles size increased in continuous epoxy matrix with increasing PEI (up to 30wt% PEI). In blends with 40wt% PEI and more, phase inverted morphology was observed where increasing PEI content caused reduction of epoxy particle size in continuous PEI matrix.

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Study of the structure and the mechanical properties of dynamically cured PP/MAH-g-SEBS/epoxy blends

Chinese Chemical Letters ◽

10.1016/j.cclet.2008.12.054 ◽

2009 ◽

Vol 20 (7) ◽

pp. 877-880 ◽

Cited By ~ 3

Author(s):

Xue Liang Jiang ◽

Yin Xi Zhang

Keyword(s):

Mechanical Properties ◽

Epoxy Blends

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Thermal and mechanical properties of diglycidylether of bisphenol A/ trimethylolpropane triglycidylether epoxy blends cured with benzylpyrazinium salts

Polymer International ◽

10.1002/pi.869 ◽

2002 ◽

Vol 51 (5) ◽

pp. 386-392 ◽

Cited By ~ 12

Author(s):

Soo-Jin Park ◽

Taek-Jin Kim ◽

Hak-Yong Kim

Keyword(s):

Mechanical Properties ◽

Bisphenol A ◽

Thermal And Mechanical Properties ◽

Epoxy Blends

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Thermal and mechanical properties of epoxy blends with a dicyanate ester containing a quinoline moiety

New Journal of Chemistry ◽

10.1039/c8nj01862f ◽

2018 ◽

Vol 42 (13) ◽

pp. 11202-11212 ◽

Cited By ~ 1

Author(s):

C. P. Sakthidharan ◽

Pudupadi R. Sundararajan ◽

Muthusamy Sarojadevi

Keyword(s):

Mechanical Properties ◽

Cyanogen Bromide ◽

Spectral Studies ◽

Thermal And Mechanical Properties ◽

Ft Ir ◽

Quinoline Moiety ◽

Epoxy Blends

Dicyanate esters (CEs) with a quinoline moiety were synthesized by treating bisphenols with cyanogen bromide in the presence of triethylamine and the structures were confirmed by FT-IR, and NMR spectral studies.

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