Quantification of branching in model three-arm star polyethylene

Handle URI:
http://hdl.handle.net/10754/562065
Title:
Quantification of branching in model three-arm star polyethylene
Authors:
Ramachandran, Ramnath; Beaucage, Gregory B.; Rai, Durgesh K.; Lohse, David J.; Sun, Thomas; Tsou, Andy; Norman, Alexander Iain; Hadjichristidis, Nikolaos ( 0000-0003-1442-1714 )
Abstract:
The versatility of a novel scaling approach in quantifying the structure of model well-defined 3-arm star polyethylene molecules is presented. Many commercial polyethylenes have long side branches, and the nature and quantity of these branches varies widely among the various forms. For instance, low-density polyethylene (LDPE) is typically a highly branched structure with broad distributions in branch content, branch lengths and branch generation (in hyperbranched structures). This makes it difficult to accurately quantify the structure and the inherent structure-property relationships. To overcome this drawback, model well-defined hydrogenated polybutadiene (HPB) structures have been synthesized via anionic polymerization and hydrogenation to serve as model analogues to long-chain branched polyethylene. In this article, model 3-arm star polyethylene molecules are quantified using the scaling approach. Along with the long-chain branch content in polyethylene, the approach also provides unique measurements of long-chain branch length and hyperbranch content. Such detailed description facilitates better understanding of the effect of branching on the physical properties of polyethylene. © 2012 American Chemical Society.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC); Polymer Synthesis Laboratory
Publisher:
American Chemical Society
Journal:
Macromolecules
Issue Date:
24-Jan-2012
DOI:
10.1021/ma2021002
Type:
Article
ISSN:
00249297
Sponsors:
This work was funded by ExxonMobil Research & Engineering Co. and the University of Cincinnati Graduate School Distinguished Dissertation Completion Fellowship. This work utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-0454672. We acknowledge the support of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, for providing the neutron research facilities used in this work. Research at Oak Ridge National Laboratory's High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. We thank B. Hammouda and S. Kline at NIST and Y. Melnichenko at ORNL for their valuable support during the beamtime.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorRamachandran, Ramnathen
dc.contributor.authorBeaucage, Gregory B.en
dc.contributor.authorRai, Durgesh K.en
dc.contributor.authorLohse, David J.en
dc.contributor.authorSun, Thomasen
dc.contributor.authorTsou, Andyen
dc.contributor.authorNorman, Alexander Iainen
dc.contributor.authorHadjichristidis, Nikolaosen
dc.date.accessioned2015-08-03T09:43:56Zen
dc.date.available2015-08-03T09:43:56Zen
dc.date.issued2012-01-24en
dc.identifier.issn00249297en
dc.identifier.doi10.1021/ma2021002en
dc.identifier.urihttp://hdl.handle.net/10754/562065en
dc.description.abstractThe versatility of a novel scaling approach in quantifying the structure of model well-defined 3-arm star polyethylene molecules is presented. Many commercial polyethylenes have long side branches, and the nature and quantity of these branches varies widely among the various forms. For instance, low-density polyethylene (LDPE) is typically a highly branched structure with broad distributions in branch content, branch lengths and branch generation (in hyperbranched structures). This makes it difficult to accurately quantify the structure and the inherent structure-property relationships. To overcome this drawback, model well-defined hydrogenated polybutadiene (HPB) structures have been synthesized via anionic polymerization and hydrogenation to serve as model analogues to long-chain branched polyethylene. In this article, model 3-arm star polyethylene molecules are quantified using the scaling approach. Along with the long-chain branch content in polyethylene, the approach also provides unique measurements of long-chain branch length and hyperbranch content. Such detailed description facilitates better understanding of the effect of branching on the physical properties of polyethylene. © 2012 American Chemical Society.en
dc.description.sponsorshipThis work was funded by ExxonMobil Research & Engineering Co. and the University of Cincinnati Graduate School Distinguished Dissertation Completion Fellowship. This work utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-0454672. We acknowledge the support of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, for providing the neutron research facilities used in this work. Research at Oak Ridge National Laboratory's High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. We thank B. Hammouda and S. Kline at NIST and Y. Melnichenko at ORNL for their valuable support during the beamtime.en
dc.publisherAmerican Chemical Societyen
dc.titleQuantification of branching in model three-arm star polyethyleneen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPolymer Synthesis Laboratoryen
dc.identifier.journalMacromoleculesen
dc.contributor.institutionDepartment of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, United Statesen
dc.contributor.institutionCorporate Strategic Research Laboratories, ExxonMobil Research and Engineering Company, Annandale, NJ 08801, United Statesen
dc.contributor.institutionDepartment of Chemistry, University of Athens, Panepistimiopolis, Zografou, 157 84 Athens, Greeceen
dc.contributor.institutionUnited Technologies Research Center, Mail Stop 129-22, 411 Silver Lane, East Hartford, CT 0610, United Statesen
kaust.authorHadjichristidis, Nikolaosen
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