Non-linear Crystalline Spherulitic Growth Behavior for LLDPE
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M. R. Kamal
Abstract
Nonlinear growth behavior was observed in two crystallization regimes, depending on the temperature. Non-linearity may be explained by the reduction of the concentration of crystallizable ethylene sequences (CES) in the melt phase. In the two regimes, the concentration of uncrystallizable ethylene sequences (UCES) increases, as the crystallization time increases, because UCES are continuously excluded from the crystal lattice into the melt phase. An empirical equation is proposed to describe the melting temperature of the crystal stem with the maximum possible length, TC, n*m, in nonlinear growth processes, assuming that the diffusion layer is negligible. A modified form of the Hoffman-Lauritzen equation (MHL) describes well the crystallization growth kinetics of LLDPE spherulites in the non-linear growth region.
References
1 Hoffman, J. D., Davis, G. T., Lauritzen, J. I., in: Treatise on Solid State Chemistry, Hannay, N. B. (Ed.), Plenum Press, New York (1976).Search in Google Scholar
2 Hoffman, J. D., Miller, R. L.: Polymer38, p. 3151 (1997).10.1016/S0032-3861(97)00071-2Search in Google Scholar
3 Phillips, P. J.: Polym. Prepr. (Am. Chem. Soc. Div. Polym. Chem.)20, p. 438 (1979).Search in Google Scholar
4 Kamal, M. R., Feng, L., Huang, T.: Can. J. Chem. Eng.80, p. 432 (2002).10.1002/cjce.5450800312Search in Google Scholar
5 Feng, L., Kamal, M. R.: Polym. Eng. Sci.45, p. 74 (2005).10.1002/pen.20231Search in Google Scholar
6 Keith, H. D., Padden, F. J.: J. Appl. Phys.35, p. 1286 (1964).10.1063/1.1713607Search in Google Scholar
7 Okada, T., Saito, H., Inoue, T.: Macromolecules23, p. 3865 (1990).10.1021/ma00218a024Search in Google Scholar
8 Okada, T., Saito, H., Inoue, T.: Polymer34, p. 4752 (1993).10.1016/0032-3861(93)90713-KSearch in Google Scholar
9 Okada, T., Saito, H., Inoue, T.: Polymer35, p. 5699 (1994).10.1016/S0032-3861(05)80044-8Search in Google Scholar
10 Wu, L., Lisowski, M., Talibuddin, S., Runt, J.: Macromolecules32, p. 1576 (1999).10.1021/ma981169oSearch in Google Scholar
11 Saito, H., Okada, T., Hamane, T., Inoue, T.: Macromolecules24, p. 4446 (1991).10.1021/ma00015a031Search in Google Scholar
12 Lambert, W. S., Phillips, P. J.: Macromolecules27, p. 3537 (1994).10.1021/ma00091a014Search in Google Scholar
13 Rodriguez–Arnold, J., Bu, Z., Cheng, S. Z. D., Hsieh, E. T., Johnson, T. W., Geerts, R. G., Palackal, S. J., Hawley, G. R., Welch, M. B.: Polymer35, p. 5194 (1994).10.1016/0032-3861(94)90469-3Search in Google Scholar
14 Abo el Maaty, M. I., Hosier, I. L., Bassett, D. C.: Macromolecules31, p. 153 (1998).10.1021/ma9711396Search in Google Scholar
15 Abo el Maaty, M. I., Bassett, D. C., Olley, R. H., Jääskeläinen, P.: Macromolecules31, p. 7800 (1998).10.1021/ma980426mSearch in Google Scholar
16 Feng, L., Kamal, M. R.: Can. J. Chem. Eng.82 (in press).Search in Google Scholar
17 Alamo, R. G., Mandelkern, L.: Thermochim. Acta238, p. 155 (1994).10.1016/S0040-6031(94)85210-3Search in Google Scholar
18 Mandelkern, L., Alamo, R. G.: In Physical Properties of Polymers Handbook, Mark, J. E. (Ed.) American Institute of Physics, New York: Woodbury (1996).Search in Google Scholar
19 Fletcher, D. P., Klein, J.: Polym. Commun.26, p. 2 (1985).Search in Google Scholar
© 2005, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Editorial
- New at International Polymer Processing
- Regular Contributed Articles
- Preparing of Homogeneous Solution of Ultrahigh Molecular Weight PAN
- Non-linear Viscoelastic Behavior of PVC Plastisol
- Algorithms for Two Gate Optimization in Injection Molding
- Viscoelastic Properties of Flexible Organic Fiber Composites
- Mold for Manipulation Microstructure Development
- Simultaneous Biaxial Stretching of PP Resins of Varying Tacticity
- Rotational Moulding of PVC Plastisol
- Drawability of As-spun PP Fibres
- Melt Fracture of Linear PE
- Investigation of the Cooling Jets Used in the Blown Film Process
- Non-linear Crystalline Spherulitic Growth Behavior for LLDPE
- Design Sensitivity Analysis for the Optimization of the Injection Molding Process
- Preparation and Characteristics of Reactive Blends of Phosphate-containing Maleimide and Epoxy
- Easy Tear Multilayer Film of Biaxially Oriented PA6/MXD6 by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Editorial
- New at International Polymer Processing
- Regular Contributed Articles
- Preparing of Homogeneous Solution of Ultrahigh Molecular Weight PAN
- Non-linear Viscoelastic Behavior of PVC Plastisol
- Algorithms for Two Gate Optimization in Injection Molding
- Viscoelastic Properties of Flexible Organic Fiber Composites
- Mold for Manipulation Microstructure Development
- Simultaneous Biaxial Stretching of PP Resins of Varying Tacticity
- Rotational Moulding of PVC Plastisol
- Drawability of As-spun PP Fibres
- Melt Fracture of Linear PE
- Investigation of the Cooling Jets Used in the Blown Film Process
- Non-linear Crystalline Spherulitic Growth Behavior for LLDPE
- Design Sensitivity Analysis for the Optimization of the Injection Molding Process
- Preparation and Characteristics of Reactive Blends of Phosphate-containing Maleimide and Epoxy
- Easy Tear Multilayer Film of Biaxially Oriented PA6/MXD6 by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
