Effects of slow heating rates on products of polyethylene pyrolysis

Advances in non-discriminating pyrolysis

“…3a shows a pyrogram obtained without the capillary being pushed into the injector (thus no post-heating applied). The a,valkadiene/n-alk-1-ene/n-alkane pattern, characteristic of polyethylene [12], extended to $C-35, which is comparable to results typically obtained using conventional pyrolyzers. Fig.…”

Flash pyrolysis of silicon-bound hydrocarbons

“…The favoured formation of n-decene and n-undecene can be explained by two subsequent 1,5 hydrogen migrations starting from the initially formed primary C,, radical. A similar phenomenon is also observed during the pyrolysis of polyethene [12].…”

Investigation of various polymeric materials for set-point temperature calibration in pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS)

“…2). As the pyrolysis temperature was increased, the amount of alkyldiene formed increased and the amount of alkane decreased [7]. Peak area ratios (alkene/alkane, alkyldiene/alkene, and alkyldiene/alkane) were calculated for n-C 11 through n-C 21 from the pyrolysis of HDPE.…”

“…The method involves pyrolysis of the polymer over a range of temperatures and generation of a calibration curve www.elsevier.com/locate/jaap plotting peak area ratios of two selected peaks versus pyrolysis set-point temperature. Comprehensive precision data for the calibration of a pyrolysis probe using either Kraton 1 or polyethylene has not previously been reported in the scientific literatures [7,8]. Wampler and Levy, for example, used n-C 17 alkyldiene/n-C 17 alkane peak area ratios from pyrolysis of polyethylene for temperature calibration of the pyrolysis probe, but they did not specify if it was low-or high-density polyethylene [7].…”

“…Comprehensive precision data for the calibration of a pyrolysis probe using either Kraton 1 or polyethylene has not previously been reported in the scientific literatures [7,8]. Wampler and Levy, for example, used n-C 17 alkyldiene/n-C 17 alkane peak area ratios from pyrolysis of polyethylene for temperature calibration of the pyrolysis probe, but they did not specify if it was low-or high-density polyethylene [7]. The authors reported that plots of peak area ratios versus set-point temperatures were linear from 600 to 1000 8C.…”