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A high-pressure phase of polyethylene and chain-extended growth
Abstract
Optical and x-ray observations of polyethylene have been made at high pressures and temperatures using a gasketed diamond-anvil cell. The experiments confirm the existence of the high-pressure phase previously postulated by Bassett and Turner. The new phase is hexagonal, with orthohexagonal lattice parameters of a = 8.46 Å and b = 4.88 Å. Comparison with the previously measured volume change indicates that there is a decrease in the c dimension to 2.45 Å per ethylene unit in transforming from orthorhombic to hexagonal structures. The likely implication is that the molecules in the hexagonal phase do not have an all-trans conformation. Chain-extended growth is the result of crystallization from the melt into the hexagonal phase, whereas chain-folded growth is the familiar process of melt crystallization.into the orthorhombic phase. Chain-extended lamellae are observed to grow outwards behind a growing edge with a permanent narrowed profile, showing that the lamellar thickness is determined in a region extending several microns behind the growth front.
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Citations
Cited by
Crystallization and Melting Behavior of Poly ( l -lactic Acid)
Kawai, T., Rahman, N., Matsuba, G., Nishida, K., Kanaya, T., Nakano, M., Okamoto, H., Kawada, J., Usuki, A., Honma, N., et al. (2007) · Macromolecules · doi:10.1021/ma070082c · Cited by 636
Structure and plastic deformation of polyethylene
Lin, L., & Argon, A. S. (1994) · Journal of Materials Science · doi:10.1007/bf01162485 · Cited by 574
Mesophases in polyethylene, polypropylene, and poly(1-butene)
Androsch, R., Di Lorenzo, M. L., Schick, C., & Wunderlich, B. (2010) · Polymer · doi:10.1016/j.polymer.2010.07.033 · Cited by 278
Effect of chain entanglements on plastic deformation behavior of linear polyethylene
Bartczak, Z. (2005) · Macromolecules · doi:10.1021/ma050815y · Cited by 116
X-ray scattering in polymers and micelles
Fairclough, J. P. A., Hamley, I. W., & Terrill, N. J. (1999) · Radiation Physics and Chemistry · doi:10.1016/s0969-806x(99)00279-0 · Cited by 32
Metadata
- Authors
- Bassett, D. C., Block, S., & Piermarini, G. J.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 1974-10-01
- Volume
- 45
- Issue
- 10
- Pages
- 4146-4150
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2040643460
- Cited by
- 302
- References
- 0
- FWCI
- 25.64
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: A high-pressure phase of polyethylene and chain-extended growth. https://app.cochat.ai/papers/10.1063/1.1663028
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- Bassett, D. C., Block, S., & Piermarini, G. J. (1974). A high-pressure phase of polyethylene and chain-extended growth. Journal of Applied Physics. https://doi.org/10.1063/1.1663028
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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