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Thermal analysis as...
Thermal analysis as a quality tool for assessing the influence of thermo-mechanical degradation on recycled poly(ethylene terephthalate)
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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Elsevier BV,2009
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-18313
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-18313URI
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https://doi.org/10.1016/j.polymertesting.2008.11.010DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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Mechanical recycling of poly(ethylene terephthalate) (PET) was simulated by multiple processing to assess the effects of thermo-mechanical degradation, and characterized using rheological and thermal analysis techniques. Thermo-mechanical degradation under repeated extrusion induces chain scission reactions in PET, which result in a dramatic loss in the deformation capabilities and an increase in the fluidity of the polymer under reprocessing, reducing its recycling possibilities after four extrusion cycles. Multiple reprocessing severely affects the storage modulus and the microstructure of recycled PET, both in the amorphous and crystalline regions. Multimodal melting behavior is observed for reprocessed PET, indicating heterogeneous and segregated crystalline regions. A deconvolution procedure has been applied to individually characterize each crystalline population in terms of lamellar thickness distribution and partial crystallinity. Thermal analysis techniques such as differential scanning calorimetry (DSC) and dynamic-mechanical analysis (DMA) have proved to be suitable techniques for the quality assessment of recycled PET, giving unequivocal information about its degree of degradation compared to the common technological measurements of melt-mass flow rate (MFR) or oxidative stability (T-OX).
Subject headings and genre
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Thermal analysis
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Recycling
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Poly(ethylene terephthalate) (PET)
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Quality assessment
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Degradation
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mechanical-properties
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pet
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injection
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blends
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soil
Added entries (persons, corporate bodies, meetings, titles ...)
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Vilaplana, Domingo Francisco JavierKTH,Fiber- och polymerteknologi(Swepub:kth)u173a4yy
(author)
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Karlsson, SigbrittKTH,Fiber- och polymerteknologi(Swepub:kth)u1g9umtq
(author)
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Ribes-Greus, A.
(author)
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KTHFiber- och polymerteknologi
(creator_code:org_t)
Related titles
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In:Polymer testing: Elsevier BV28:2, s. 169-1750142-94181873-2348
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