caa a22 4500 378903209 CHVBK 20180305123523.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.112 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.112 Degradation of unstabilised polypropylene and a propene- 1-pentene copolymer [Elektronische Daten] [Stefan de Goede, Robert Brüll, Harald Pasch, Niall Marshall] The degradation of polypropylene (PP) and a propene-1-pentene copolymer (P2) have been monitored with regard to chemical composition, molar mass distribution and chemical composition distribution. The increase in the carbonyl index can be monitored by IR and a decrease in molar mass can be observed from size-exclusion chromatography (SEC). CRYSTAF shows that the chemical heterogeneity of the samples broadens with continuing degradation. SEC-FTIR reveals that the degraded species are mainly found in the low-molecular-weight end of the molar mass distribution. Spatial heterogeneity of the degradation process has been proven by the analysis of abrased layers. It was found that the P2 copolymer degrades at a higher rate compared to PP. © 2013 by Walter de Gruyter GmbH & Co. de Goede Stefan SASOL Polymers, P.O. Box 72, Modderfontein 1645, South Africa; Fax ++27 11 458-0734 aut Brüll Robert Deutsches Kunststoff-Institut (German Institute for Polymers), Schlossgartenstr. 6, 64289 Darmstadt, Germany; www.dki-online.de; Fax ++49 6151 292855 aut Pasch Harald Deutsches Kunststoff-Institut (German Institute for Polymers), Schlossgartenstr. 6, 64289 Darmstadt, Germany; www.dki-online.de; Fax ++49 6151 292855 aut Marshall Niall SASOL Wax, P.O. Box 1, Sasolburg 1947, South Africa aut e-Polymers De Gruyter 4/1(2004-12-01), 112-120 2197-4586 4:1<112 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.112 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.112 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Goede Stefan SASOL Polymers, P.O. Box 72, Modderfontein 1645, South Africa; Fax ++27 11 458-0734 aut NATIONALLICENCE 700 1- Brüll Robert Deutsches Kunststoff-Institut (German Institute for Polymers), Schlossgartenstr. 6, 64289 Darmstadt, Germany; www.dki-online.de; Fax ++49 6151 292855 aut NATIONALLICENCE 700 1- Pasch Harald Deutsches Kunststoff-Institut (German Institute for Polymers), Schlossgartenstr. 6, 64289 Darmstadt, Germany; www.dki-online.de; Fax ++49 6151 292855 aut NATIONALLICENCE 700 1- Marshall Niall SASOL Wax, P.O. Box 1, Sasolburg 1947, South Africa aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 112-120 2197-4586 4:1<112 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter