29th Annual PolyMAC Meeting: book of abstracts

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A sixteen-run, Resolution IV, fractional factorial screening design has been used to evaluate the relative significance of seven independent material and process variables for an electrically deposited commercial acrylic paint. A Resolution IV design was chosen so that variable interactions could be detected without any interference from the effects of the variables themselves. Because resource limitations did not permit use of a Resolution V design, the two-way interactions were confounded with one another in groups of three, which unfortunately made interpretation of the results more complicated. Each design point was replicated once and a pair of centerpoints were run at ... continued below

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Balazs, B July 23, 1999.

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A sixteen-run, Resolution IV, fractional factorial screening design has been used to evaluate the relative significance of seven independent material and process variables for an electrically deposited commercial acrylic paint. A Resolution IV design was chosen so that variable interactions could be detected without any interference from the effects of the variables themselves. Because resource limitations did not permit use of a Resolution V design, the two-way interactions were confounded with one another in groups of three, which unfortunately made interpretation of the results more complicated. Each design point was replicated once and a pair of centerpoints were run at the beginning, in the middle and at the end of the design points. A total of 38 test panels were prepared. Independent variables used in this experiment were total charge, current density, mixer speed, silica content, crossover point, temperature and solids fraction. The magnitude of each independent variable's effect on the dependent response variables was estimated by fitting a first-order model with two-way interaction terms. Three-way interactions were assumed to be insignificant. Interaction confounding was eliminated by using the significance of the independent variables to determine which of the three possible interactions was significant. Data analysis was performed using the Bayes Plot option of the JMP statistics program from SAS Institute. Only effects with a posterior probability equal to or greater than 0.95 were considered to be significant. Response variables analyzed were weight deposited, film thickness, surface roughness and plating efficiency. Results of the analysis are summarized. The following conclusions were formulated from the analysis of this experiment: Centerpoint behavior brings shelf-stability of the aqueous paint baths into question; Interactions among the material and process variables are present and significant; The magnitudes of some interaction effects equal or exceed the magnitudes of some of the effects of the independent variables; Silica is detrimental to surface smoothness, interacts strongly with other variables, is hard to keep suspended in aqueous baths, and should be replaced with a liquid rheology control agent; and Because of the significance of two-way variable interactions, One-Variable-At-A-Time experiments with this material and process could lead to erroneous conclusions about variable effects.

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3.1 Megabytes pages

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  • Other Information: PBD: 23 Jul 1999

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  • Report No.: UCRL-ID-134662
  • Report No.: DP0401281
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/14691 | External Link
  • Office of Scientific & Technical Information Report Number: 14691
  • Archival Resource Key: ark:/67531/metadc626143

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  • July 23, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 5, 2016, 8:59 p.m.

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Balazs, B. 29th Annual PolyMAC Meeting: book of abstracts, report, July 23, 1999; California. (digital.library.unt.edu/ark:/67531/metadc626143/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.