## Abstract Summary: The vast majority of headβtoβtail stereoregular crystallizable polymers with an isotactic structure generally assume a helical symmetry in the crystalline state, compatible with the regular repetition along the chain axis of isomorphous isoclined units. There are at least two c
Energetic calculations of the chain conformation of isotactic polymers of olefins in the crystalline state
β Scribed by P. Corradini; V. Petraccone; B. Pirozzi
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 460 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0014-3057
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π SIMILAR VOLUMES
## Abstract The postulate of geometric equivalence of the monomeric units of a tactic chain with regard to an axis (I) and the postulate that the conformation is such that the internal energy of the chain, considered as not subjected to external forces, is the lowest (II), can be applied to the pre
Molecular mechanics methods have been used in order to find the conformations of various syndiotactic polymers in crystals. Three different classes of polymers have been examined: i) polyolefins, such as poly(propylene), polystyrene, poly(1-butene) and poly(1,2-butadiene); ii) polydienes, such as ci