Abstraet--Conformational energy calculations for the ~-form of isotactic polypropylene were carried out for possible adjacent re-entry fold schemes resulting from the inherent directionality of isotatic chains and from examination of the crystalline structure. The calculated fold conformational ener
Adjacent reentry of folded polydimethylsilane polymer chains
β Scribed by Dr. Robert D. Boyd; Prof. Jas Pal S. Badyal
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 180 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0935-9648
No coin nor oath required. For personal study only.
β¦ Synopsis
How does the polymer chain fold when polymer single crystals are grown? Evidence from AFM images of the surface structure of polydimethylsilane crystals is presented that suggests the adjacent recently model, in which the chains are regularly folded. Making hairpin turns at the surface (see Figure), describes the process better than the random (switchboard) model, in which an amorphous overlayer is produced.magnified image
π SIMILAR VOLUMES
## Abstract The mode of packing and the adjacent reβentry folds of chains of syndiotactic 1,2βpoly(1,3βbutadiene) have been studied by molecular mechanics calculations with the use of various sets of potential functions. The results of the packing analysis indicate that the crystal grows preferenti