Magnetic orientation of isotactic polypropylene
作者： T Kawai , T Kimura
DOI: 10.1016/S0032-3861(99)00150-0
关键词:
摘要: Abstract Magnetic orientation of a low molecular weight isotactic polypropylene (iPP) is reported. Unlike other crystalline polymers for which the magnetic has already been reported by our group, iPP was less expected to undergo because its repeating unit does not contain aromatic rings are main source diamagnetic anisotropy. The observed samples melted in field (6 T) temperature range between 180 and 240°C followed cooling. This well above melting point (168°C). X-ray crystallization kinetics measurements indicated that some ordered structure exists this range. obtained quenching exhibited crystals with b -axis aligned parallel field.
elsevier.com
sci-hub.se 参考文章(17)
Physical properties of polymers handbook Physical Properties of Polymers Handbook. ,(2007) , 10.1007/978-0-387-69002-5
Tsunehisa Kimura, Hidetoshi Ezure, Hiroaki Sata, Fumiko Kimura, Shintaro Tanaka, Eiko Ito, Magnetic orientation of crystalline polymers in view of liquid crystallinity during induction period of crystallization Molecular Crystals and Liquid Crystals. ,vol. 318, pp. 141- 155 ,(1998) , 10.1080/10587259808045381
J.K. Krüger, Evidence for structures in paraffin-melts by Brillouin-spectroscopy Solid State Communications. ,vol. 30, pp. 43- 46 ,(1979) , 10.1016/0038-1098(79)91129-3
J.K. Krüger, L. Peetz, W. Wildner, M. Pietralla, Evidence for structural transformations in polymer melts Polymer. ,vol. 21, pp. 620- 626 ,(1980) , 10.1016/0032-3861(80)90317-1
M.A. Gomez, Hajime Tanaka, A.E. Tonelli, High-resolution solid-state 13C nuclear magnetic resonance study of isotactic polypropylene polymorphs Polymer. ,vol. 28, pp. 2227- 2232 ,(1987) , 10.1016/0032-3861(87)90378-8
H. Sata, T. Kimura, S. Ogawa, M. Yamato, E. Ito, Magnetic orientation of poly(ethylene-2,6-naphthalate) Polymer. ,vol. 37, pp. 1879- 1882 ,(1996) , 10.1016/0032-3861(96)87304-6
Chi Wang, L. M. Hwang, Transcrystallization of PTFE fiber/PP composites (I) crystallization kinetics and morphology Journal of Polymer Science Part B. ,vol. 34, pp. 47- 56 ,(1996) , 10.1002/(SICI)1099-0488(19960115)34:1<47::AID-POLB2>3.0.CO;2-T
Hiroaki Sata, Tsunehisa Kimura, Shintaro Ogawa, Eiko Ito, Magnetic orientation of poly(ethylene-2,6-naphthalate) during crystallization from melt Polymer. ,vol. 39, pp. 6325- 6330 ,(1998) , 10.1016/S0032-3861(97)10073-8
Andrew J. Lovinger, Jaime O. Chua, Carl C. Gryte, Studies on the α and β forms of isotactic polypropylene by crystallization in a temperature gradient Journal of Polymer Science Part B. ,vol. 15, pp. 641- 656 ,(1977) , 10.1002/POL.1977.180150405
A. M. Chatterjee, F. P. Price, S. Newman, Heterogeneous nucleation of crystallization of high polymers from the melt. I. Substrate‐induced morphologies Journal of Polymer Science Part B. ,vol. 13, pp. 2369- 2383 ,(1975) , 10.1002/POL.1975.180131211