Summary
Crystallization under controlled shear conditions has been optically monitored for a series of sharp molecular weight fractions of poly(ethylene oxide). The minimum shear rate (MSR) necessary to produce oriented crystalline morphologies exhibited a strong molecular weight (M) dependence: MSR=K/M1.47. The time necessary for erasure of orientation effects after crystal melting was also determined and found to be proportional to M1.42.
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Buerger, D.E., Engberg, K., Jansson, J.F. et al. Crystallization of sheared polymer melts: poly(ethylene oxide) fractions. Polymer Bulletin 22, 593–598 (1989). https://doi.org/10.1007/BF00718939
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DOI: https://doi.org/10.1007/BF00718939