期刊
POLYMER DEGRADATION AND STABILITY
卷 94, 期 10, 页码 1722-1727出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.06.016
关键词
Polypropylene impact-copolymer; Thermooxidation degradation; Fractionation; Extrusion
资金
- Czech Grant Agency [104/07/16311638]
Neat and multiple processed polypropylene impact-copolymer (ICPP) were fractionated using series of hydrocarbon solvents with increasing solvent power. The analyses of the fractions obtained in successive extractions showed significant decrease in weight-average molecular weight (Mw) and narrowing the molecular weight distribution (MWD) of investigated samples after extrusions. Although the changes due to thermooxidation were observed in all phases of the system, the most intensive degradation was found in the prevailing PP homopolymer phase. (C) 2009 Elsevier Ltd. All rights reserved.
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