10 Result(s)
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Article
Youn Hee Kim
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Article
Effect of polymerization conditions on the size change of poly(ethylene glycol) hydrogel nanoparticles
Suspension polymerization was used to prepare PEG homopolymer particles with nanometer size. In order to achieve the optimized reaction conditions for producing the smallest nanosized particles, the effects of...
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Liquid nucleating additives for improving thermal insulating properties and mechanical strength of polyisocyanurate foams
The effects of liquid-type nucleating silane additives on the cell structure, mechanical strength, and thermal insulating properties of the polyisocyanurate (PIR) foams have been studied. The PIR foams synthes...
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Article
Effects of compatibilizers on the mechanical properties and interfacial tension of polypropylene and poly(lactic acid) blends
The effects of compatibilizers and hydrolysis on the tensile and impact strength, interfacial tension and morphology of the PP/PLA (80/20) blends were investigated. For the PP/PLA (80/20) blends before hydroly...
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Effects of nucleating agents on the morphological, mechanical and thermal insulating properties of rigid polyurethane poams
This study examined the effects of liquid and solid additives on the morphological, mechanical and thermal insulating properties of rigid polyurethane foams (PUFs). The PUFs synthesized with tetramethylsilane ...
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Effects of filler characteristics and processing conditions on the electrical, morphological and rheological properties of PE and PP with conductive filler composites
The electrical, morphological and rheological properties of melt and dry mixed composites of polyethylene (PE)/graphite (Gr), polypropylene (PP)/Gr and PP/nickel-coated carbon fiber (NCCF) were investigated as...
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Article
Effects of silicone surfactant on the cell size and thermal conductivity of rigid polyurethane foams by environmentally friendly blowing agents
Rigid polyurethane foams (PUF)s were synthesized with environmentally friendly blowing agents such as a cyclopentane/distilled water (10.0/1.0, pphp) mixture and distilled water only for four different silicon...
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Effects of organoclay on the thermal insulating properties of rigid polyurethane poams blown by environmentally friendly blowing agents
A process designed to synthesize rigid polyurethane foam (PUF) with insulative properties via the modulation of PUF cell size via the addition of clay and the application of ultrasound was assessed. The blowin...
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Article
Morphological, mechanical and rheological properties of poly(acrylonitrile-butadienestyrene)/polycarbonate/poly(ε-caprolactone) ternary blends
The effects of poly(ε-caprolactone) (PCL) on poly(acrylonitrile-butadiene-styrene) (ABS) and polycarbonate (PC) blends were studied. Blends of ABS/PC (70/30, wt%) with PCL as a compatibilizer were prepared by ...
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Article
Generalized state machines and generalized transformation semigroups
We introduce the concepts of a generalized state machine and a generalized transformation semigroup and discuss their algebraic properties.
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Article
Simultaneous saccharification of inulin and ethanol fermentation by recombinantSaccharomyces cerevisiae secreting inulinase
VariousSaccharomyces cerevisiae strains were transformed with a 2 μ-based multicopy expression plasmid, pYIGP, carryingKluyveromyces marxianus inulinase gene under the control ofGAPDH promoter. Among them two str...
