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Recycled polyolefins. Material properties and means for quality determination
KTH, Superseded Departments, Fibre and Polymer Technology.ORCID iD: 0000-0002-5394-7850
2004 (English)In: Advances in Polymer Science, ISSN 0065-3195, E-ISSN 1436-5030, Vol. 169, 201-229 p.Article, review/survey (Refereed) Published
Abstract [en]

Recycling of polymers has come to be a necessary part of the development of a sustainable society. Recycling of low price bulk polymers, to which group the polyolefins belong, is seen by many as a waste of time and resources when they simply may be energy recovered. Several life-cycle assessments (LCA) have, however, proven that it is also valuable to material recycle bulk polymers such as polyolefins. In many instances, polyolefins are inplant recycled and used again in similar products, but they may also be separated and sorted from municipal solid waste. This paper will discuss recycled polyolefins, in particular their change in material properties and how to characterise these properties and show that these analyses are a basis for quality determination. In fact, an important vehicle for the success of recycled polymeric materials is to use a quality concept. Accurate determination of a series of polymeric properties will be the only way recycled polymeric materials can compete with virgin ones. Analytical methods useful in the quality concept are presented and discussed. In particular, three parameters are important for quality measurements. These are degree of degradation, polymer composition and presence of low molecular weight compounds (degradation products of polymer matrix and additives, initiator/catalysts, solvents, use-related e.g. fragrance or flavour etc.). For the future it is important to give recycled polymeric materials status as resources besides the fossil and renewable ones.

Place, publisher, year, edition, pages
2004. Vol. 169, 201-229 p.
Keyword [en]
recycling, recycling as resources, polyolefins, quality, degree of degradation, polymer composition, low molecular weight compounds, NIR, DSC, MAE, chromatography, multivariate modelling, low-density polyethylene, near-infrared spectroscopy, differential scanning calorimetry, multivariate data-analysis, least-squares calibration, mechanical-properties, polymer blends, quantitative-analysis, raman-spectroscopy, stabilization mechanisms
National Category
Polymer Chemistry
URN: urn:nbn:se:kth:diva-23637DOI: 10.1007/b94173ISI: 000223226800008ScopusID: 2-s2.0-2942636193OAI: diva2:342336
QC 20100525 QC 20111101Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-11-01Bibliographically approved

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