PMID- 35054644
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220128
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 14
IP  - 2
DP  - 2022 Jan 7
TI  - Macromolecular Insights into the Altered Mechanical Deformation Mechanisms of 
      Non-Polyolefin Contaminated Polyolefins.
LID - 10.3390/polym14020239 [doi]
LID - 239
AB  - Current recycling technologies rarely achieve 100% pure plastic fractions from a 
      single polymer type. Often, sorted bales marked as containing a single polymer 
      type in fact contain small amounts of other polymers as contaminants. Inevitably, 
      this will affect the properties of the recycled plastic. This work focuses on 
      understanding the changes in tensile deformation mechanism and the related 
      mechanical properties of the four dominant types of polyolefin (PO) (linear 
      low-density polyethylene (LLDPE), low-density polyethylene (LDPE), high-density 
      polyethylene (HDPE), and polypropylene (PP)), contaminated with three different 
      non-polyolefin (NPO) polymers (polyamide-6 (PA-6), polyethylene terephthalate 
      (PET), and polystyrene (PS)). Under the locally elevated stress state induced by 
      the NPO phase, the weak interfacial adhesion typically provokes decohesion. The 
      resulting microvoids, in turn, initiate shear yielding of the PO matrix. LLDPE, 
      due to the linear structure and intercrystalline links, is well able to maintain 
      high ductility when contaminated. LDPE shows deformation similar to the pure 
      material, but with decreasing ductility as the amount of NPO increases. Addition 
      of 20 wt% PA-6, PET, and PS causes a drop in strain at break of 79%, 63%, and 
      84%, respectively. The typical ductile necking of the high-crystalline HDPE and 
      PP is strongly disturbed by the NPO phase, with a transition even to full brittle 
      failure at high NPO concentration.
FAU - Demets, Ruben
AU  - Demets R
AD  - Circular Plastics, Department of Circular Chemical Engineering, Faculty of 
      Science and Engineering, Maastricht University, Urmonderbaan 22, 6162 AL Geleen, 
      The Netherlands.
AD  - Laboratory for Circular Process Engineering (LCPE), Department of Green Chemistry 
      and Technology, Faculty of Bioscience Engineering, Ghent University, Campus 
      Kortrijk, Sint-Martens-Latemlaan 2B/5, 8500 Kortrijk, Belgium.
AD  - Dutch Polymer Institute (DPI), 5600 AX Eindhoven, The Netherlands.
FAU - Grodent, Marie
AU  - Grodent M
AD  - Centre for Polymer and Material Technologies (CPMT), Department of Materials, 
      Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent 
      University, Technologiepark 130, 9052 Ghent, Belgium.
FAU - Van Kets, Karen
AU  - Van Kets K
AD  - Laboratory for Circular Process Engineering (LCPE), Department of Green Chemistry 
      and Technology, Faculty of Bioscience Engineering, Ghent University, Campus 
      Kortrijk, Sint-Martens-Latemlaan 2B/5, 8500 Kortrijk, Belgium.
AD  - Dutch Polymer Institute (DPI), 5600 AX Eindhoven, The Netherlands.
FAU - De Meester, Steven
AU  - De Meester S
AD  - Laboratory for Circular Process Engineering (LCPE), Department of Green Chemistry 
      and Technology, Faculty of Bioscience Engineering, Ghent University, Campus 
      Kortrijk, Sint-Martens-Latemlaan 2B/5, 8500 Kortrijk, Belgium.
FAU - Ragaert, Kim
AU  - Ragaert K
AUID- ORCID: 0000-0002-1498-6785
AD  - Circular Plastics, Department of Circular Chemical Engineering, Faculty of 
      Science and Engineering, Maastricht University, Urmonderbaan 22, 6162 AL Geleen, 
      The Netherlands.
LA  - eng
GR  - 832/Dutch Polymer Institute/
GR  - 2S05-021/Interreg 2 Seas program/
PT  - Journal Article
DEP - 20220107
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8779932
OTO - NOTNLM
OT  - commodity plastics
OT  - deformation mechanisms
OT  - immiscible polymer blends
OT  - mechanical recycling
OT  - polyolefins
OT  - structure-property relationships
COIS- The authors declare no conflict of interest.
EDAT- 2022/01/22 06:00
MHDA- 2022/01/22 06:01
PMCR- 2022/01/07
CRDT- 2022/01/21 01:09
PHST- 2021/11/30 00:00 [received]
PHST- 2021/12/16 00:00 [revised]
PHST- 2021/12/20 00:00 [accepted]
PHST- 2022/01/21 01:09 [entrez]
PHST- 2022/01/22 06:00 [pubmed]
PHST- 2022/01/22 06:01 [medline]
PHST- 2022/01/07 00:00 [pmc-release]
AID - polym14020239 [pii]
AID - polymers-14-00239 [pii]
AID - 10.3390/polym14020239 [doi]
PST - epublish
SO  - Polymers (Basel). 2022 Jan 7;14(2):239. doi: 10.3390/polym14020239.