PMID- 31880927
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20200625
LR  - 20200625
IS  - 1520-5126 (Electronic)
IS  - 0002-7863 (Linking)
VI  - 142
IP  - 3
DP  - 2020 Jan 22
TI  - Controlling the Shape of Molecular Weight Distributions in Coordination 
      Polymerization and Its Impact on Physical Properties.
PG  - 1443-1448
LID - 10.1021/jacs.9b11462 [doi]
AB  - High-density polyethylene (HDPE) is utilized in a multitude of commercial 
      products worldwide due to its broad spectrum of physical properties and low 
      production costs. Molecular weight and dispersity (D) are known to affect the 
      tensile and rheological properties of HDPE, but little is known about the 
      influence of the molecular weight distribution (MWD) shape on these properties. 
      In this work, we investigate this matter through the temporal regulation of 
      initiation in a living coordination-insertion polymerization of ethylene. This 
      method provides precise control over the MWD shape which, in turn, offers a 
      systematic study on the influence of MWD shape on the physical properties of 
      HDPE. Through rheological testing, we observe a difference in complex viscosity 
      and shear thinning with opposite MWD skew. However, tensile testing reveals that 
      the MWD skew does not impact the strain at break, signifying the ability to 
      influence HDPE processing without compromising material strength.
FAU - Sifri, Renee J
AU  - Sifri RJ
AD  - Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell 
      University , Ithaca , New York 14853-1301 , United States.
FAU - Padilla-Velez, Omar
AU  - Padilla-Velez O
AD  - Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell 
      University , Ithaca , New York 14853-1301 , United States.
FAU - Coates, Geoffrey W
AU  - Coates GW
AUID- ORCID: 0000-0002-3400-2552
AD  - Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell 
      University , Ithaca , New York 14853-1301 , United States.
FAU - Fors, Brett P
AU  - Fors BP
AUID- ORCID: 0000-0002-2222-3825
AD  - Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell 
      University , Ithaca , New York 14853-1301 , United States.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20200109
PL  - United States
TA  - J Am Chem Soc
JT  - Journal of the American Chemical Society
JID - 7503056
SB  - IM
EDAT- 2019/12/28 06:00
MHDA- 2019/12/28 06:01
CRDT- 2019/12/28 06:00
PHST- 2019/12/28 06:00 [pubmed]
PHST- 2019/12/28 06:01 [medline]
PHST- 2019/12/28 06:00 [entrez]
AID - 10.1021/jacs.9b11462 [doi]
PST - ppublish
SO  - J Am Chem Soc. 2020 Jan 22;142(3):1443-1448. doi: 10.1021/jacs.9b11462. Epub 2020 
      Jan 9.