Quantification of branching in model three-arm star polyethylene

Ramnath Ramachandran; Gregory B. Beaucage; Durgesh K. Rai; David J. Lohse; Thomas Sun; Andy Tsou; Alexander Iain Norman; Nikos Hadjichristidis

doi:10.1021/ma2021002

Quantification of branching in model three-arm star polyethylene

Ramnath Ramachandran, Gregory B. Beaucage, Durgesh K. Rai, David J. Lohse, Thomas Sun, Andy Tsou, Alexander Iain Norman, Nikos Hadjichristidis

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1056-1061
Number of pages	6
Journal	Macromolecules
Volume	45
Issue number	2
DOIs	https://doi.org/10.1021/ma2021002
State	Published - Jan 10 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.

ASJC Scopus subject areas

Materials Chemistry
Organic Chemistry
Polymers and Plastics
Inorganic Chemistry

Access to Document

10.1021/ma2021002

Cite this

@article{6311808df7b6465091a2d3f13b8421f6,

title = "Quantification of branching in model three-arm star polyethylene",

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. {\textcopyright} 2012 American Chemical Society.",

author = "Ramnath Ramachandran and Beaucage, {Gregory B.} and Rai, {Durgesh K.} and Lohse, {David J.} and Thomas Sun and Andy Tsou and Norman, {Alexander Iain} and Nikos Hadjichristidis",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.",

year = "2012",

month = jan,

day = "10",

doi = "10.1021/ma2021002",

language = "English (US)",

volume = "45",

pages = "1056--1061",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "2",

}

TY - JOUR

T1 - Quantification of branching in model three-arm star polyethylene

AU - Ramachandran, Ramnath

AU - Beaucage, Gregory B.

AU - Rai, Durgesh K.

AU - Lohse, David J.

AU - Sun, Thomas

AU - Tsou, Andy

AU - Norman, Alexander Iain

AU - Hadjichristidis, Nikos

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.

PY - 2012/1/10

Y1 - 2012/1/10

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10754/562065

UR - https://pubs.acs.org/doi/10.1021/ma2021002

UR - http://www.scopus.com/inward/record.url?scp=84856182109&partnerID=8YFLogxK

U2 - 10.1021/ma2021002

DO - 10.1021/ma2021002

M3 - Article

SN - 0024-9297

VL - 45

SP - 1056

EP - 1061

JO - Macromolecules

JF - Macromolecules

IS - 2

ER -

Quantification of branching in model three-arm star polyethylene

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this