Elucidation of Short Chain Branching in Polyethylene

Peak ratio Linear polyethylene Ziegler polyethylene High-pressure polyethylene 

Reproduced with permission from J. van Schooten and J.K. Evenhuis, Polymer, 1965, 6, 11, 561. 1965, Elsevier  

Pyrograms were also prepared for a range of polyethylene containing different amounts of short chain branching (see Table 10.10 for details of samples). Previous work by high-energy electron irradiation and mass spectrometry has shown that the short branches in low-density polyethylenes are mainly ethyl and n-butyl groups, but other short branches have also been supposed to be present. 

Sample -Butane Iso- pentane 3-Methyl pentane 3-Methyl heptane 

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