PMID- 38323928
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240221
IS  - 1520-5126 (Electronic)
IS  - 0002-7863 (Linking)
VI  - 146
IP  - 7
DP  - 2024 Feb 21
TI  - Chemically Recyclable Linear and Branched Polyethylenes Synthesized from 
      Stoichiometrically Self-Balanced Telechelic Polyethylenes.
PG  - 4771-4782
LID - 10.1021/jacs.3c12660 [doi]
AB  - High-density polyethylene (HDPE) is a widely used commercial plastic due to its 
      excellent mechanical properties, chemical resistance, and water vapor barrier 
      properties. However, less than 10% of HDPE is mechanically recycled, and the 
      chemical recycling of HDPE is challenging due to the inherent strength of the 
      carbon-carbon backbone bonds. Here, we report chemically recyclable linear and 
      branched HDPE with sparse backbone ester groups synthesized from the 
      transesterification of telechelic polyethylene macromonomers. Stoichiometrically 
      self-balanced telechelic polyethylenes underwent transesterification 
      polymerization to produce the PE-ester samples with high number-average molar 
      masses of up to 111 kg/mol. Moreover, the transesterification polymerization of 
      the telechelic polyethylenes and the multifunctional diethyl 
      5-(hydroxymethyl)isophthalate generated branched PE-esters. Thermal and 
      mechanical properties of the PE-esters were comparable to those of commercial 
      HDPE and tunable through control of the ester content in the backbone. In 
      addition, branched PE-esters showed higher levels of melt strain hardening 
      compared with linear versions. The PE-ester was depolymerized into telechelic 
      macromonomers through straightforward methanolysis, and the resulting 
      macromonomers could be effectively repolymerized to generate a high molar mass 
      recycled PE-ester sample. This is a new and promising method for synthesizing and 
      recycling high-molar-mass linear and branched PE-esters, which are competitive 
      with HDPE and have easily tailorable properties.
FAU - Jang, Yoon-Jung
AU  - Jang YJ
AUID- ORCID: 0000-0002-2592-1733
AD  - Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, 
      United States.
FAU - Nguyen, Sam
AU  - Nguyen S
AUID- ORCID: 0000-0002-4479-5744
AD  - Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, 
      United States.
FAU - Hillmyer, Marc A
AU  - Hillmyer MA
AUID- ORCID: 0000-0001-8255-3853
AD  - Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, 
      United States.
LA  - eng
PT  - Journal Article
DEP - 20240207
PL  - United States
TA  - J Am Chem Soc
JT  - Journal of the American Chemical Society
JID - 7503056
SB  - IM
EDAT- 2024/02/07 12:46
MHDA- 2024/02/07 12:47
CRDT- 2024/02/07 10:23
PHST- 2024/02/07 12:47 [medline]
PHST- 2024/02/07 12:46 [pubmed]
PHST- 2024/02/07 10:23 [entrez]
AID - 10.1021/jacs.3c12660 [doi]
PST - ppublish
SO  - J Am Chem Soc. 2024 Feb 21;146(7):4771-4782. doi: 10.1021/jacs.3c12660. Epub 2024 
      Feb 7.