Experimental design waxing

Recently Bark et al. [54] have used a similar DSC cell to measure heat transfer, SAXS, and WAXS simultaneously. In this experimental design the WAXS was registered by a linear gas filled detector in a range of scattering angles from 8 = 7°... 

WAXS indicated that higher levels of vinyl acetate and PEMA could provide more efficient dispersion of the montmorillonite. Since no TEM pictures were provided, the degree of exfoliation of the montmorillonite in the polymer blends cannot be assessed definitively. No experimental design was provided and no statistical analysis was carried out. No analysis was provided to determine the statistical relevance of the presumed significant independent variables, vinyl acetate and PEMA content. 

Fig. 1. Simultaneous DSC/WAXS/SAXS design. Experimental setup of the microcalorimeter cell in the time-resolved synchrotron X-ray diffraction environment The cell is positioned with sample-containing capillary perpendicular to the beam in such a way that the diffraction patterns are recorded in the vertical plane including the beam by one or two one-dimensional proportional detectors (Position Sensitive Linear Detector 1 and LD2). Counting Electronic (Counting Elect.), Nanovoltmeter (mVter), and Temperature Controller (T Ctrl) are all monitored by the same PC Computer (PC Comp.). Temperature-Controlled Bath (TCB) is kept at constant temperature (e.g., 20°C). Figure is adapted from Reference 3.

Phase I study showed the project could yield an 11.9% internal rate of return by assuming a zero cost for coke feedstock and selling electric power at market price and F-T wax as premium products. Based on this favorable result, Texaco proceeded to Phase II experimental work which validated the key design parameters used in Phase I study. The Texaco EECP project was completed in 2003 after the completion of Phases I and II (4,5). Phase III work was cancelled because of the unavailability of the project host site after the Chevron and Texaco merger. 

Direct observation and measurement of the depth of particle embedment in opaque materials involves serious experimental difficulties. Hence we have used paraffin wax in measuring the depth of particle embedment. The paraffin was poured into a specially designed brass dish. After deposition of dust on the paraffin, it was shced by means of a histological microtome blade into longitudinal layers with a thickness less than 10 /xm. The paraffin was sufficiently transparent so that the depth of particle embedment and the particle diameter could be determined by microscopic examination. 

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