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An ultracentrifugal analysis of fractionated polyvinylchloride-I

✍ Scribed by W.I. Bengough; G.F. Grant

Book ID
103071849
Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
501 KB
Volume
7
Category
Article
ISSN
0014-3057

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✦ Synopsis

The sedimentation constants and intrinsic viscosities of fractionated PVC (Geon have been determined in tetrahydrofuran at 20 and 25 Β° respectively. A comparison of the molecular weights as evaluated from the above constants is made. The M,, values derived from the intrinsic viscosity are low; the M,~ values evaluated from sedimentation and viscometriΒ’ data are rather high compared with those obtained for the whole polymer. This behaviour indicates the presence of long branched molecules in the polymer.

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