Browsing by Author "Mert, Emine Hilal, Burcu Kekevi"

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    Synthesis of polyHIPEs through high internal phase emulsions of β-myrcene
    (colloid and polymer science, 2020-08-20) Mert, Emine Hilal, Burcu Kekevi
    PolyHIPEs are an important class of porous polymers with well-defined hierarchical porosity and tunable morphology. However, the insufficient mechanical properties arise due to high volume of voids bringing difficulties in applications. In this study, polyHIPEs with tailored morphological and mechanical properties were prepared by using a monoterpene for the first time. In this respect, copolymerization of β-myrcene with several comonomers within water-in-oil (w/o) high internal phase emulsions (HIPEs) has been extensively investigated. Accordingly, combining β-myrcene and ethylene glycol dimethacrylate (EGDMA) in polyHIPE structure was demonstrated as a successful approach for tailoring the morphology, as well as the mechanical strength. PolyHIPEs with cavities between 1.09 and 3.55 μm were obtained by changing the ratio of β-myrcene in the continuous phase of HIPEs. Moreover, resulting polyHIPEs have found to have improved mechanical strength. The highest compressive modulus achieved for the obtained monoliths was determined to be 38.8 MPa
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    Synthesis of β-myrcene-based macroporous nanocomposite foams: Altering the morphological and mechanical properties by using organo-modified nanoclay
    (journal of applied polymer science, 2021-03-20) Mert, Emine Hilal, Burcu Kekevi
    Organo-modified nanoclay incorporated high internal phase emulsions (HIPEs)were successfully used for the preparation of macroporous nanocomposite foams.Due to the aim of obtaining mechanicallyimproved foams, HIPEs were preparedby using a monomer mixture composed ofβ-myrcene and ethylene glycoldimethacrylate. Accordingly, two groups of macroporous nanocomposite foamswere synthesized depending on the nanoclay type. The morphological analysisdemonstrated that the pore openness of the resulting nanocomposites were signifi-cantly improved due to the decrease in the average cavity size and increase in theinterconnected poresize. In terms of mechanical properties, it was found that fill-ing 1 wt% of nanoclay which is surface modified by hydrogenated tallow lead to a33% of increment in the compression modulus, as compared to the neat foam.However, loading 5 wt% of nanoclay having octadecylamine andaminopropyltriethoxysilane surface groups caused only 11% of increment in thecompression modulus, as compared to the neat foam