Abstract
The crystallization behavior of PEOs with molecular weight of 10k and 200k as well as their blends was studied in details. The results show that the lower molecular weight PEO crystallizes with faster crystallization rate as judged from a shorter time for completing the crystallization. On the other hand, the higher molecular weight PEO crystallizes at relatively higher temperature, indicating an early start of crystallization compared with the lower molecular weight one. The blends of these two PEOs with different blend ratios always cocrystallize during the cooling processes. It is confirmed that mixing of the 10k PEO with the 200k one is in favor of the crystallization of the system. This is not only demonstrated by the early start of the crystallization at higher crystallization temperature, and also a faster crystal growth of the blend with respect to the 200k PEO. The crystallization of the blends at higher temperature is caused by an early start of nucleation and an increment of nucleus density. This may originate from the density fluctuation of the blend and a reduction in energy barrier for nucleation. Moreover, it is found that the crystallinity of the 10k PEO rich blends increases with increasing concentration of the 10k PEO. This is caused by the solvent effect of the 10k PEO toward the 200k PEO. On the other hand, the crystallinity of the 30/70 (10k/200k) PEO blend is decreased a little bit. This may be a balanced result of the improved crystallization of the 200k PEO at the expense of the high crystallization ability of the 10k PEO.
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Kovacs, A.J. and Gonthier, A., Kolloid Z.Z., Polymer, 1972, 250: 530
Kovacs, A.J., Gonthier, A. and Straupe, C., J. Polym. Sci. Polym. Symp., 1975, 50: 283
Kovacs, A.J., Straupe, C. and Gonthier, A., J. Polym. Sci. Polym. Symp., 1977, 59: 31
Kovacs, A.J. and Straupe, C., Famday Discuss. Chem. Soc., 1979, 68: 225
Kovacs, A.J. and Straupe, C., J. Cryst. Growth, 1980, 48: 210
Cheng, S.Z.D., Zhang, A., Chen, J.H. and Herberer, D.P., J. Polym. Sci., Polym. Phys. Ed., 1991, 29: 287
Cheng, S.Z.D., Zhang, A., Barley, J.S., Chen, J.H., Habenschuss, A. and Zschack, P.R., Macromolecules, 1991, 24: 3937
Cheng, S.Z.D., Chen, J.H., Barley, J.S. and Zhang, A., Macromolecules, 1992, 25: 1453
Cheng, S.Z.D., Wu, S.S., Chen, J.H., Zhou, Q.Z. and Quirk, R.P., Macromolecules, 1993, 26: 5105
Lee, S.W., Chen, E.Q., Zhang, A., Yoon, Y., Moon, B.S., Lee, S., Harris, F.W. and Cheng, S.Z.D., Macromolecules, 1996, 29: 8816
Chen, E.Q., Lee, S.W., Zhang, A., Moon, B.S., Mann, I., Harris, F.W. and Cheng, S.Z.D., Macromolecules, 1999, 32: 4784
Cimmino, S., Greco, R., Martuscelli, E., Nicolais, L. and Silvestre, C., Polymer, 1978, 19: 1079
Cheng, S.Z.D. and Wunderlich, B., J. Polym. Sci. Polym. Phys. Ed., 1986, 24: 577
Cheng, S.Z.D. and Wunderlich, B., J. Polym. Sci. Polym. Phys. Ed., 1986, 24: 595
Cheng, S.Z.D., Bu, H.S. and Wunderlich, B., J. Polym. Sci. Polym. Phys. Ed., 1988, 26: 1947
Cheng, S.Z.D., Noid, D.W. and Wunderlich, B., J. Polym. Sci. Polym. Phys. Ed., 1989, 27: 1149
Balijepalli, S., Schultz, J.M. and Lin, J.S., Macromolecules, 1996, 29: 6601
Cheng, S.Z.D. and Chen, J.H., J. Polym. Sci., Part B: Polym. Phys., 1991, 29: 311
Carvalbo, J.L., Cormier, S.L., Lin, N. and Dalnoki-Veress, K., Macromolecules, 2012, 45: 1688
Hu, W.B. Lect. Notes Phys, Springer-Verlag Berlin Heidelberg: New York, 2007.
Mark, J.E. Physical Properties of Polymer Handbook, AIP Press: Woodbury, NY, 1996
Loiseau, A. and Tassin, J.F., Macromolecules, 2006, 39: 9185
Chen, S.W. and Chang, F.C., Polymer, 2001, 42: 9763
Bassett, D.C. Principles of Polymer Morphology, Cambridge University Press: Cambridge, 1981
Gedde, U.W. Polymer Physics, Chapman and Hall: London, 1995
Takahashi, Y. and Tadokoro, H., Macromolecules, 1973, 6: 672
Takahashi, Y., Sumita I. and Tadokoro H., J. Polym. Sci. Polym. Phys. Ed., 1973, 11: 2113
Allen, R. C. and Mandelkern, L., J. Polym. Sci. Polym. Phys. Ed., 1982, 20: 1465
Mandelkern, L. and Stack, G.M., Macromolecules, 1984, 17: 871
Cai, L., Li, L., Liao, Q. and Yan, S., Acta Polymerica Sinica (in Chinese), 2012, (11): 1342
Che, N. and Xie, X.M., Acta Polymerica Sinica (in Chinese), 2013, (5): 635
Xue, F., Chen, X., An, L., Funari, S.S. and Jiang, S., Chinese J. Polym. Sci., 2013, 31(9): 1260
Wang, Z., Wang, H., Shimizu, K., Dong, J., Hsiao, B.S. and Han, C.C., Polymer, 2005, 46: 2675
Niu, Y., Wang, Z., Orta, C.A., Xu, D., Wang, H., Shimizu, K., Hsiao, B.S. and Han, C.C., Polymer, 2007, 48: 6668
Shao, W., Zhang, Y., Wang, Z., Niu, Y., Yue, R. and Hu, W., Ind. Eng. Chem. Res., 2012, 51: 15953
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This work was financially supported by the National Natural Science Foundation of China (Nos. 21274009 and 51221002).
Invited paper for the special issue of “Polymer Crystallization”
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Li, L., Liu, Jt., Ren, Zj. et al. Crystallization behavior of disproportionately high and low molecular weight PEO blends. Chin J Polym Sci 32, 1199–1209 (2014). https://doi.org/10.1007/s10118-014-1497-7
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DOI: https://doi.org/10.1007/s10118-014-1497-7