Effects of Tmeltand tmelton the long period of polyethylene
- 1 January 1983
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science, Part B
- Vol. 22 (2), 305-320
- https://doi.org/10.1080/00222348308215506
Abstract
The equilibrium state of polyethylene melt was studied by examining the effects of Tmelt and tmelt on the long period of B melt melt quenched polyethylene. The long period was found to be proportional to M−½ and to depend on Tmelt with a temperature coefficient α = −0.5 × 10−3. When the melt temperature was changed from one to the other, a relaxation time (3 to 5.5 min) was determined based on long-period measurements. In addition, the relaxation time was found to be proportional to for polydisperse linear polyethylenes. These findings, long relaxation time and the M−3.3 dependency, are discussed in light of current crystallization mechanisms and origins of the M−3.3 dependency.Keywords
This publication has 12 references indexed in Scilit:
- The use of synchrotron radiation for study of structural changes in polymers during phase transition and deformationJournal of Polymer Science: Polymer Physics Edition, 1980
- Memory effect in liquid polyolefinePolymer Bulletin, 1980
- Crystallization of polymers. Part II : Fractionated polyethylene quenched from the liquid stateJournal de Physique, 1980
- On the problem of crystallization of polymers from the melt with chain foldingFaraday Discussions of the Chemical Society, 1979
- Molecular morphology in semicrystalline polymersNature, 1978
- The structure of crystalline linear polyethylene produced by rapid cooling from the meltJournal of Polymer Science Part C: Polymer Letters, 1976
- Statistical mechanics of chain moleculesBiopolymers, 1969
- Molecular weight dependence of isothermal long period growth of polyethylene single crystalsPolymer, 1965
- Über Langperioden bei verstrecktem PolyäthylenAngewandte Chemie, 1962
- Point dislocations in crystals of high polymer moleculesJournal of Polymer Science, 1962