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Polymer degradation VI—Distribution changes on polyisobutene degradation in laminar flow

✍ Scribed by R.S. Porter; M.J.R. Cantow; J.F. Johnson

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
490 KB
Volume
8
Category
Article
ISSN
0032-3861

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Polymer degradation. V. Changes in molec
Polymer degradation. V. Changes in molecular weight distributions during sonic irradiation of polyisobutene
✍ Roger S. Porter; Manfred J. R. Cantow; Julian F. Johnson 📂 Article 📅 1967 🏛 John Wiley and Sons 🌐 English ⚖ 269 KB 👁 2 views

Gel permeation chromatography was used to follow changes in the molecular weight distribution of a polyisobutene, initial = 466,000, during degradation induced by sonic irradiation. In general, a steady decrease in molecular weight was observed, although a bimodal distribution was present after 20,

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Polyisobutene (PIB) dissolved in saturated hydrocarbons was degraded by irradiation with 2 ,us impulses of 15 MeV electrons. The time dependence of the change of light-scattering intensity (LSI) (due to the decrease of molecular weight) was measured. The half life r I,\_,(LS) of the decrease of LSI