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Determination of the molecular weight distribution of polyisoprene by random scission

✍ Scribed by C. Booth; J. T. Harlan


Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
383 KB
Volume
16
Category
Article
ISSN
0021-8995

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✦ Synopsis


Synopsis

cis-Polyisoprene in dilute solution in toluene (plus antioxidant) undergoes random scission when exposed to ?-radiation. The possibility of using this scission in a method to assess the width of the molecular weight distribution of the polymer has been explored and found potentially useful in situations where conventional methods provide little information.


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The number-and weight-average molecular weights of several statistical and high ortho novolac resins were determined using gel permeation chromatography (GPC). The standards used were pure compounds having between 2 and 12 phenol units bridged via methylene linkages. Three series of compounds were s