Conformational modifications and the equilibrium melting point of crystalline polyethylene
作者： O.V. Romankevich , S.Ya. Frenkel
DOI: 10.1016/0032-3950(78)90451-3
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摘要: Abstract Problems connected with the crystalline structure of PE and determination its equilibrium melting point are discussed. Analysis evidence in literature indicates that there at least three topomorphic modifications PE, namely crystals folded chains, extended chains having end groups concentrated on faces, distributed within crystal acting as defects. The extrapolation procedures applied to simplified models these forms give different values heats points. physical significance analysed detail it is shown existence conformational (topomers) fact possible. It found when actual experimental results used for extrapolation, points lie range temperatures predicted by current theories (140° T m 0
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sci-hub.se 参考文章(29)
Paul R. Swan, Polyethylene unit cell variations with branching Journal of Polymer Science. ,vol. 56, pp. 409- 416 ,(1962) , 10.1002/POL.1962.1205616411
J. G. Fatou, L. Mandelkern, THE EFFECT OF MOLECULAR WEIGHT ON THE MELTING TEMPERATURE AND FUSION OF POLYETHYLENE. The Journal of Physical Chemistry. ,vol. 69, pp. 417- 428 ,(1965) , 10.1021/J100886A010
Franklin R. Anderson, Morphology of Isothermally Bulk‐Crystallized Linear Polyethylene Journal of Applied Physics. ,vol. 35, pp. 64- 70 ,(1964) , 10.1063/1.1713100
V.I. Selikhova, N.F. Bakeyev, Yu.A. Zubov, N.M. Kotov, F.F. Sukhov, V.S. Schirets, G.P. Belov, Determining the melting point of oriented polyethylene Polymer Science U.S.S.R.. ,vol. 17, pp. 2090- 2096 ,(1975) , 10.1016/0032-3950(75)90106-9
L. Mandelkern, Thermodynamic and morphological properties of crystalline polymers The Journal of Physical Chemistry. ,vol. 75, pp. 3909- 3920 ,(1971) , 10.1021/J100695A001
S. Frenkel, V. G. Baranov, Topomorphism and phase dualism of flexible chain polymers British Polymer Journal. ,vol. 9, pp. 228- 233 ,(1977) , 10.1002/PI.4980090311
H. E. Bair, R. Salovey, The effect of molecular weight on the structure and thermal properties of polyethylene Journal of Macromolecular Science, Part B. ,vol. 3, pp. 3- 18 ,(1969) , 10.1080/00222346908217085
L.A. Igonin, Influence of external pressure on the structure and properties of polymers Polymer Science U.S.S.R.. ,vol. 10, pp. 3146- 3162 ,(1968) , 10.1016/0032-3950(68)90245-1
Paul J. Flory, Thermodynamics of Crystallization in High Polymers. IV. A Theory of Crystalline States and Fusion in Polymers, Copolymers, and Their Mixtures with Diluents The Journal of Chemical Physics. ,vol. 17, pp. 223- 240 ,(1949) , 10.1063/1.1747230
Yu.A. Zubov, V.I. Selikhova, M.B. Konstantinopol'skaya, N.F. Bakeyev, Crystallization and annealing of crystalline polymers under high pressure Polymer Science U.s.s.r.. ,vol. 16, pp. 532- 548 ,(1974) , 10.1016/0032-3950(74)90585-1