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Simulation and Experimental Measurement of Liquid Crystal Polymer Orientation During Injection Molding

Published online by Cambridge University Press:  21 May 2018

Anthony Sullivan Open the ORCID record for Anthony Sullivan [Opens in a new window] ,
Anil Saigal  and
Michael A. Zimmerman
Anthony Sullivan*
Affiliation:
Department of Mechanical Engineering, Tufts University, Medford, MA 02155, U.S.A.
Anil Saigal
Affiliation:
Department of Mechanical Engineering, Tufts University, Medford, MA 02155, U.S.A.
Michael A. Zimmerman
Affiliation:
Department of Mechanical Engineering, Tufts University, Medford, MA 02155, U.S.A.
*
*(Email: anthony.sullivan@tufts.edu)
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Abstract

Liquid crystal polymers (LCP’s) comprise a class of materials that derive desirable, but anisotropic, engineering properties from long-range molecular ordering. The ability to model the polymer texture is essential to the design of manufacturing processes for isotropic material production. Previous efforts to model LCP directionality have been primarily restricted to structured grids and simple geometries that demonstrate the underlying theory, but fall short of simulating realistic manufacturing geometries. In this investigation, a practical methodology is proposed to simulate the director field in full-scale melt-processing domains and wide-angle x-ray scattering (WAXS) is used to experimentally validate modeling results. It is shown that the model generates good agreement with experimental measurements of both the orientation state and degree of order.

Keywords

modelingsimulationx-ray diffraction (XRD)
Type
Articles
Information
MRS Advances , Volume 3 , Issue 39: Characterization, Modeling and Theory , 2018 , pp. 2311 - 2316
Copyright
Copyright © Materials Research Society 2018 

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References

REFERENCES

Donald, A.M. and Windle, A.H., Liquid Crystalline Polymers, New York, Cambridge, Cambridge University Press (1992).Google Scholar
Donald, A.M., Viney, C., and Windle, A.H., Polymer, 24(2), 155–159 (1983).CrossRefGoogle Scholar
Breiby, D.W., Bunk, O., Andreasen, J.W., Lemke, H.T., and Nielsen, M.M., J. Appl. Cryst., 41, 262–271 (2008).CrossRefGoogle Scholar
Frank, F.C., Disc. Far. Soc., 25, 19–28 (1958).CrossRefGoogle Scholar
Ericksen, J.L., Kol.-Zeit., 173(2), 117–122 (1960).CrossRefGoogle Scholar
Leslie, F.M., Arch. Rat. Mech. Anal., 28(4), 265–283 (1968).CrossRefGoogle Scholar
Fang, J., Burghardt, W.R., and Bubeck, R.A., Polym. Eng. Sci., 48(11), 2258–2269 (2008).CrossRefGoogle Scholar
Fang, J., Burghardt, W.R., Bubeck, R.A., Burgard, S.M., and Fischer, D.A., Polym. Eng. Sci., 50(9), 1864–1877 (2010).CrossRefGoogle Scholar
Goldbeck-Wood, G., Yonetake, K., Hobdell, J., Lavine, M.S., Coulter, P., and Windle, A.H., Molec. Sim., 21(2), 143–160 (1998).CrossRefGoogle Scholar
Basset, D.C., Developments in Crystalline Polymers-2, “Orientation in Liquid Crystal Polymers,” London, New York, Elsevier Applied Science Publishers (1988).CrossRefGoogle Scholar
Rendon, S., Bubeck, R.A., Thomas, L.S., Burghardt, W.R., Hexemer, A., and Fischer, D.A., J. App. Polym. Sci., 106(4), 2502–2514 (2007).CrossRefGoogle Scholar
Ahmadzadegan, A., Zimmerman, M.A., and Saigal, A., Eng. App. Comp. Fl. Mech., 7(3), 346–354 (2013).Google Scholar
Larson, R.G. and Doi, M., J. Rheo., 35(4), 539–563 (1991).CrossRefGoogle Scholar