|Author||CROOK, M. A. ♦ WALKER, F. S.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Publisher||Nature Publishing Group|
|Subject Keyword||CHEMISTRY ♦ AIR ♦ COBALT 60 ♦ DECOMPOSITION ♦ DIAGRAMS ♦ DISTRIBUTION ♦ ELECTRONS ♦ GAMMA SOURCES ♦ IRRADIATION ♦ MEASURED VALUES ♦ MOLECULES ♦ ORGANIC CHLORINE COMPOUNDS ♦ POLYMERIZATION ♦ POLYMERS ♦ POLYVINYLS ♦ RADIATION DOSES ♦ STATISTICS ♦ VACUUM ♦ VISCOSITY ♦ WEIGHT|
|Abstract||Gradient elution fractionation and viscosity measurements were used to study changes in the molecular weight distribution in irradiated polyvinyl chloride. The polymer was irradiated with either 6 Mrad of Co<sup>60</sup> gamma rays in vacuum or 6 Mrad of 2-Mev electrons in air. The molecular weight distribution curve of vacuum-irradiated polymer showed some crosslinking but no degradation, while that for air-irradiated polymer showed extensive degradation. Attempts were made to fit statistical theories to the curves, and it is concluded that the crosslinking process obeys a simple statistical theory while the degradation process does not obey any such simple idea. (D.L.C.)|
|Learning Resource Type||Article|
|Publisher Department||British Insulated Callender's Cables, Ltd., London|
|Organization||British Insulated Callender's Cables, Ltd., London|
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