Single crystal structure of form I syndiotactic poly(butene-1)

Citation
B. Zhang et al., Single crystal structure of form I syndiotactic poly(butene-1), MACROMOLEC, 34(15), 2001, pp. 5221-5223
Citations number
17
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULES
ISSN journal
00249297 → ACNP
Volume
34
Issue
15
Year of publication
2001
Pages
5221 - 5223
Database
ISI
SICI code
0024-9297(20010717)34:15<5221:SCSOFI>2.0.ZU;2-M
Abstract
The structures of single crystals of syndiotactic poly(butene-1) in form I, produced by thin-film growth, are studied by transmission electron microsc opy and electron diffraction. Bright-field electron microscopy observation shows that the single crystal exhibits a regular rectangular shape with the long axis along its crystallographic b-axis. Electron diffraction results indicate an isochiral C-centered packing of a-fold helical chains in an ort horhombic unit cell corresponding to the C222(1) space group, according to the model proposed in the literature. The differences with the polymorphic behavior of syndiotactic polypropylene concerning the formation and the sta bility of the isochiral mode of packing are outlined.