Premium
Mean‐Square End‐to‐End Distance and Characteristic Ratio of Polyvinylene (Polyacetylene) Chains of Various Configurations
Author(s) -
Vohlídal Jiří
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200500350
Subject(s) - polyacetylene , chain (unit) , mean square , chemistry , polymer chemistry , square (algebra) , crystallography , stereochemistry , materials science , polymer , physics , mathematics , geometry , organic chemistry , quantum mechanics , mathematical analysis
Summary: Closed‐form analytical expressions are derived for the mean‐square end‐to‐end distance of unperturbed polyvinylene chains of various configurational structure with freely rotating main‐chain single bonds. In particular, expressions are derived for ( i ) stereoregular chains: all‐ trans , all‐ cis and cis ‐ trans alternating; ( ii ) atactic cis ‐ trans chains with a Bernoullian distribution of cis and trans units along the chain and various content of trans units, ( iii ) regularly segmented cis ‐ trans chains [– cis y – trans y –] n and ( iv ) diblock chains cis x – trans y . The conformation factor is determined for several atactic polyvinylenes for which the unperturbed dimensions are available in the literature.