G. Charlet, G. Delmas
Nov 1, 1984
Citations
3
Influential Citations
56
Citations
Journal
Polymer
Abstract
Abstract The structure of poly(4-methylpentene-1) (P4MP1) crystallized in semi-dilute solutions (polymer volume fraction between 0.02 and 0.08) in linear and branched alkanes, cycloalkanes, alkane-like compounds, aromatics, carbon tetrachloride and carbon disulphide is reported. As much as five different modifications can be recovered, depending on the solvent and the thermal history of the solution. The results are consistent with the existence of a wide variety of polymer conformations in solution, made accessible by the P4MP1 solubility over a large temperature range. From the observed effects of solvent and thermal history, the main parameter which determines the resulting polymer structure, appears to be the crystallization temperature. The four possible structures prepared in the lower cycloalkanes, as well as crystallizing from tetraalkyltins, structures often unexpected with regard to the correlation with the crystallization temperature, suggest that specific solvent effects, involving shape and size factors, could also affect the resulting polymer conformation at low temperature.