Pheonomenological Analysis of Polymer Chain Orientation in Semicrystalline Polymers During Fabrication Process

Wu JP

Korea Polymer Journal, Vol.5, No.2, 106-113, June, 1997

A Phenomenological analysis of the crystalline orientation of a semicrystalline polymers and the orientation of polymer melts prior to the onset of crystallization was proposed. A generalized linear relationship between the second order tensors representing the orientations of the melt and the crystallized states was developed using fourth rank tensor W^*_ijk/. The crystalline orientation factors were derived using W^*_ijk/ tensor and the rheo-optical law for the polymer melt. Previous experimental observations such as the jump of crystalline orientation level and the change of orientation mode compared with the predicted values from the rheo-optical law can be described by our approach. The values of W₁₂ for melt spun high density polyethylene fiber were 20 and -9.5, respectively. Those values for isotatic polypropylene fibers were 26 and -12.5, respectively.

[References]

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White JL, Spruiell JE, Polym. Eng. Sci., 21, 859 (1981)
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Wimberger-Friedl R, Hendriks RDHM, Polymer, 30, 1143 (1989)
Dees JR, Spruiell JE, J. Appl. Polym. Sci., 18, 1053 (1974)
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Hoffman JD, Polymer, 24, 3 (1983)
Hoffman JD, Polymer, 23, 656 (1982)
White JL, Principles of Polymer Engineering Rheology, Wiley (1990)

[1] Philippoff W, J. Appl. Phys., 27, 984 (1956)

[2] Adams EB, Whitehead JC, Bogue DC, AIChE J., 11, 1026 (1965)

[3] Wales JLS, Philippoff W, Rheol. Acta, 12, 25 (1973)

[4] Yoo HJ, Han CD, J. Rheol., 25, 115 (1981)

[5] Arai T, Hatta H, J. Soc. Rheol. Jpn., 8, 67 (1980)

[6] Oda K, White JL, Clark ES, Polym. Eng. Sci., 18, 53 (1978)

[7] Choi KJ, White JL, Spruiell JE, J. Appl. Polym. Sci., 25, 2777 (1980)

[8] Kang HJ, White JL, Int. Polym. Process., 1, 12 (1986)

[9] Thomas LS, Cleereman KJ, SPE J., 28, 61 (1972)

[10] White JL, Cakmak M, Adv. Polym. Technol., 6, 295 (1986)

[11] Ishizuka O, Koyama K, Sen-I Gakkaishi, 22, T43 (1976)

[12] Nadella HP, Henson HM, Spruiell JE, White JL, J. Appl. Polym. Sci., 21, 3003 (1977)

[13] Choi KJ, Spruiell JE, White JL, Polym. Eng. Sci., 29, 463 (1989)

[14] Advani SG, Tucker CL, J. Rheol., 31, 751 (1987)

[15] Hermans PH, Platzek P, Kolloid. Z., 88, 68 (1939)

[16] White JL, Spruiell JE, Polym. Eng. Sci., 21, 859 (1981)

[17] Ward IM, Hadley DW, An Introduction to the Mechanical Properties of Solid Polymers, Wiley (1993)

[18] Wimberger-Friedl R, Hendriks RDHM, Polymer, 30, 1143 (1989)

[19] Dees JR, Spruiell JE, J. Appl. Polym. Sci., 18, 1053 (1974)

[20] Spruiell JE, White JL, Polym. Eng. Sci., 15, 660 (1975)

[21] Choi KJ, Spruiell JE, White JL, J. Polym. Sci. B: Polym. Phys., 20, 27 (1982)

[22] Hoffman JD, Polymer, 24, 3 (1983)

[23] Hoffman JD, Polymer, 23, 656 (1982)

[24] White JL, Principles of Polymer Engineering Rheology, Wiley (1990)