Recycling of Polypropylene/Polyethylene Blends: Effect of Chain Structure on the Crystallization Behaviors
| Autor: | Majid Sarmadi, Chuanchom Aumnate, Natalie Rudolph |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
crystal structure
Materials science crystallization Polymers and Plastics Kinetics 02 engineering and technology recycling 010501 environmental sciences 01 natural sciences Article law.invention lcsh:QD241-441 chemistry.chemical_compound Crystallinity lcsh:Organic chemistry law Crystallization 0105 earth and related environmental sciences Polypropylene Chemical resistance General Chemistry Polyethylene 021001 nanoscience & nanotechnology Low-density polyethylene chemistry Chemical engineering kinetics polymer blends and alloys High-density polyethylene 0210 nano-technology |
| Zdroj: | Polymers, Vol 11, Iss 9, p 1456 (2019) Polymers Volume 11 Issue 9 |
| ISSN: | 2073-4360 |
| Popis: | The combination of high-density polyethylene (HDPE), low-density polyethylene (LDPE) and polypropylene (PP) is frequently found in polymer waste streams. Because of their similar density, they cannot be easily separated from each other in the recycling stream. Blending of PP/ polyethylenes (PEs) in different ratios possibly eliminate the sorting process used in the regular recycling process. PP has fascinating properties such as excellent processability and chemical resistance. However, insufficient flexibility limits its use for specific applications. Blending of PP with relative flexible PEs might improve its flexibility. This is a unique approach for recycling or upcycling, which aims to maintain or improve the properties of recycled materials. The effects of the branched-chain structures of PEs on the crystallization behavior and the related mechanical properties of such blends were investigated. The overall kinetics of crystallization of PP was significantly influenced by the presence of PEs with different branched-chain structures. The presence of LDPE was found to decrease the overall crystallization rate while the addition of HDPE accelerated the crystallization process of the blends. No negative effect on the mechanical performance and the related crystallinity was observed within the studied parameter range. |
| Databáze: | OpenAIRE |
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