ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The polymer chain conformation of crystalline poly(vinylidene chloride) (PVDC) has been the subject of controversy for the past three decades. In this study, a combination of techniques has been employed in an attempt to elucidate the preferred conformation of PVDC. Conformational models containing two monomers per translational repeat distance have been considered. Calculations of the translational repeat distance and the nonbonded Cl⃛Cl contact distance between two adjacent CCl2 groups have been performed for each of the models. By comparing these results with those derived from x-ray analysis and a theoretical estimation of the minimum nonbonded Cl⃛Cl contact distance, an initial judgment of the structural feasibility of the models has been gained. A symmetry analysis has been performed for each conformational model and theoretical estimations of the polarization and intensity of the C—Cl and C—H stretching vibrations have been obtained. These results have been compared with experimental infrared and Raman spectra. It is concluded that a TXTX′ (where X and X′ are torsional angles of equal value but opposite sign) chain-conformational model for PVDC is favored.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1980.180180108
