Polymer Recovery through Selective Dissolution of Co-mingled Post-Consumer Waste Plastics

It still remains a challenge to the recycling industry to develop an efficient and economical large-scale plastic waste recycling system, in spite of growing environmental concerns in waste disposal. Selective dissolution and precipitation (SDP) is a mechanical recycling technique that eliminates pr...

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Bibliographic Details
Published in:Progress in rubber, plastics and recycling technology plastics and recycling technology, 2017-05, Vol.33 (2), p.75-84
Main Authors: Kannan, P., Lakshmanan, G., Shoaibi, A. Al, Srinivasakannan, C.
Format: Article
Language:English
Subjects:
Dissolution
Economics
Experiments
High density polyethylenes
Industrial development
Laboratories
Low density polyethylenes
Plastic scrap
Plastics
Polyethylene terephthalate
Polyethylenes
Polymers
Polystyrene resins
Quality
Recycling
Resins
Solvents
Sorting
Studies
Temperature
Wastes
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Summary:It still remains a challenge to the recycling industry to develop an efficient and economical large-scale plastic waste recycling system, in spite of growing environmental concerns in waste disposal. Selective dissolution and precipitation (SDP) is a mechanical recycling technique that eliminates pre-sorting of mixed waste plastics and recycling polymer of high-grade quality. In this preliminary investigation, recycling of a comingled post-consumer waste plastic mixture of low-density polyethylene (LDPE), polystyrene (PS), high-density polyethylene (HDPE), and polyethylene terephthalate (PETE) using a lab-scale SDP setup was examined. A few experimental runs performed on the representative samples using Xylene/Toluene as solvents and acetone/2-propanol as anti-solvents demonstrated the sorting and recycling efficiency of this technique. FT-IR analysis of the reclaimed products revealed that the structural properties being very similar to virgin materials.
ISSN:1477-7606
1478-2413
DOI:10.1177/147776061703300202