2021
DOI: 10.1021/acsapm.1c00648
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Why is Recycling of Postconsumer Plastics so Challenging?

Abstract: The ubiquitous use of plastics has been driven by their combination of low cost and properties, but these attributes directly challenge waste management schemes for plastic recycling. Some postconsumer recycling programs are now nearly 50 years old, but a significant fraction of plastics still finds landfills or other dumping strategies at their end of life. With the growing concern regarding plastic waste, especially ocean plastics, there is a need for innovation and alternative strategies for the economic tr… Show more

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Cited by 189 publications
(143 citation statements)
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“…Degradative cyclization of poly(phenyl vinyl ketone). Development of e cient, atom-economical methods for transformation of plastics into valuable-added chemicals is important to stimulate their recycling and reduce the relevant wastes 4,5 . However, deconstruction of C(sp 3 )−C(sp 3 ) backbone of polyole ns remains a signi cant challenge and usually suffers from drastic reaction conditions, poor selectivity, low valueadded products, and low e ciency.…”
Section: Resultsmentioning
confidence: 99%
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“…Degradative cyclization of poly(phenyl vinyl ketone). Development of e cient, atom-economical methods for transformation of plastics into valuable-added chemicals is important to stimulate their recycling and reduce the relevant wastes 4,5 . However, deconstruction of C(sp 3 )−C(sp 3 ) backbone of polyole ns remains a signi cant challenge and usually suffers from drastic reaction conditions, poor selectivity, low valueadded products, and low e ciency.…”
Section: Resultsmentioning
confidence: 99%
“…However, deconstruction of C(sp 3 )−C(sp 3 ) backbone of polyole ns remains a signi cant challenge and usually suffers from drastic reaction conditions, poor selectivity, low valueadded products, and low e ciency. In contrast to polyesters 38 and polyamides 39 , catalytic degradative cyclization of polyole ns remains almost unexplored 4,20,35 . Encouraged by the above results, we deliberately focused our investigation on the previously unexplored cyclizative degradation of poly(vinyl ketone) that are an important class of smart and packing materials.…”
Section: Resultsmentioning
confidence: 99%
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“…This recyclate has a low Mw, a property that greatly influences the environmental stress cracking resistance of PE materials. Moreover, the presence of inorganic impurities, previously detected, together with a certain level of degradation caused during the recycling process [45,46] also determines the lower ESCR performance of the rFN. On the other hand, raw resins PE3, PE4 and PE5 have overall higher ESCR values due to its high Mw, which helps to increase the tie molecular density [47][48][49].…”
Section: Blends For Packaging Applicationmentioning
confidence: 99%
“…Current technologies used to sort plastic waste are based on Near Infrared (NIR), Xray Fluorescence (XRF), and VIS (color analysis by camera or spectro-colorimeter) [23][24][25]. Some other technologies, such as mid-infrared (MIR), shape recognition, hyperspectral imaging, electrostatic separators, and barcode scanners, show potential for sorting plastic recyclables but are yet to be used in large scale plastic sorting [26][27][28][29].…”
Section: Plastic Type Identification Principlesmentioning
confidence: 99%