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The elongational flow-induced alignment process of a lamellar-forming polystyrene-b-poly(ethylene propylene) (SEP) diblock copolymer has been investigated by using elongational flow opto-rheometry (EFOR) and small angle X-ray scattering (SAXS). The lamellar domains of the compression molded SEP were aligned in a preferred direction by roll casting at 200°C. In the EFOR measurement, the roll-cast film...
The morphology of the D2O-induced reverse micellar structure of an amphiphilic block copolymer of poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide)(EO76PO29EO76) was investigated in hydrophobic media by small angle neutron scattering (SANS). Increasing D2O in the styrene/divinylbenzene solution of EO76PO29EO76 led to a change in morphology of the reverse micelles from a short range...
Novel regenerated cellulosic materials have been developed using an environmentally-friendly, facile process without releasing any toxic materials. Untreated, cellulose diacetate fibers were immersed in the aqueous caustic solution. The degummed and dried diacetate fibers were heated at a rate of 2°C/min from 30 to 98°C, then treated for 30min at the same temperature and cooled at a rate of 2°C/min...
This paper shows SNR degradation caused by phase-noise of local oscillator in three cases of pilot symbol structures in OFDM scheme and three cases of phase-noise from oscillator instabilities, through experimental results. OFDM signal used in this paper is using 2048 FFT in 20 MHz channel bandwidth. OFDM symbol is using 1538 sub-carriers and symbol length is 0.1 ms. Pilot symbol structures in OFDM...
Ordered mesoporous materials with a hydrothermally-stable, protozeolitic framework were prepared by exploring the direct conversion of inorganic species based on co-surfactant templating systems. To confer hydrothermal stability on the mesoporous materials, the organic-inorganic hybrids were heat-treated in strongly basic media. Co-surfactant templating systems of cetyltrimethylammonium bromide [C...
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