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Polyethylene unit cell variations with branching
Abstract
It is demonstrated by accurate x‐ray diffraction measurements that a variety of types of branches will affect the dimensions of the orthorhombic unit cell of polyethylene. In particular, the random placement of methyl branches on the molecular backbone by means of copolymerization of 12 mole‐% of propylene with ethylene will expand the a dimension of the unit cell by as much as 7%, and the b dimensions about 0.5%. In addition, alkyl branches up to five carbons in length, chlorine atoms, oxidation products, and probably crosslinks will also expand the cell dimensions. A qualitative explanation of the uniform, anisotropic expansion due to random inclusion of dilating centers is presented.
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Citations
Cited by
Keller, A. (1968) · Reports on Progress in Physics · doi:10.1088/0034-4885/31/2/304 · Cited by 411
Polyethylene unit cell variations with temperature
Swan, P. R. (1962) · Journal of Polymer Science · doi:10.1002/pol.1962.1205616410 · Cited by 288
Self-citationCrystallization and melting of copolymers of polymethylene
Richardson, M. J., Flory, P. J., & Jackson, J. B. (1963) · Polymer · doi:10.1016/0032-3861(63)90028-4 · Cited by 265
Nojima, S., Fukagawa, Y., & Ikeda, H. (2009) · Macromolecules · doi:10.1021/ma901964a · Cited by 43
Metadata
- Authors
- Swan, P. R.
- Venue
- Journal of Polymer Science
- Publisher
- Wiley
- Published
- 1962-02
- Volume
- 56
- Issue
- 164
- Pages
- 409-416
- ISSN
- 0022-3832 (ISSN-L)
- 1542-6238
- OpenAlex
- W1965489370
- Cited by
- 200
- References
- 0
- FWCI
- 17.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- Swan, P. R. (1962). Polyethylene unit cell variations with branching. Journal of Polymer Science. https://doi.org/10.1002/pol.1962.1205616411
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