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Featured researches published by Travis W. Baughman.


Journal of the American Chemical Society | 2010

Nanoscale Morphology in Precisely Sequenced Poly(ethylene-co-acrylic acid) Zinc Ionomers

Michelle E. Seitz; Christopher D. Chan; Kathleen L. Opper; Travis W. Baughman; Kenneth B. Wagener; Karen I. Winey

The morphology of a series of linear poly(ethylene-co-acrylic acid) zinc-neutralized ionomers with either precisely or randomly spaced acid groups was investigated using X-ray scattering, differential scanning calorimetry (DSC), and scanning transmission electron microscopy (STEM). Scattering from semicrystalline, precise ionomers has contributions from acid layers associated with the crystallites and ionic aggregates dispersed in the amorphous phase. The precisely controlled acid spacing in these ionomers reduces the polydispersity in the aggregate correlation length and yields more intense, well-defined scattering peaks. Remarkably, the ionic aggregates in an amorphous, precise ionomer with 22 mol % acid and 66% neutralization adopt a cubic lattice; this is the first report of ionic aggregate self-assembly onto a lattice in an ionomer with an all-carbon backbone. Aggregate size is insensitive to acid content or neutralization level. As the acid content increases from 9.5 to 22 mol % at approximately 75% neutralization, the number density of aggregates increases by approximately 5 times, suggesting that the ionic aggregates become less ionic with increasing acid content.


Advances in Polymer Science | 2005

Recent advances in ADMET polymerization

Travis W. Baughman; Kenneth B. Wagener


Macromolecules | 2007

Synthesis and Morphology of Well-Defined Poly(ethylene-co-acrylic acid) Copolymers

Travis W. Baughman; Christopher D. Chan; Karen I. Winey; Kenneth B. Wagener


Tetrahedron | 2004

The facile preparation of alkenyl metathesis synthons

Travis W. Baughman; John C. Sworen; Kenneth B. Wagener


Macromolecules | 2006

Sequenced Ethylene−Propylene Copolymers: Effects of Short Ethylene Run Lengths

Travis W. Baughman; John C. Sworen; Kenneth B. Wagener


Macromolecular Symposia | 2009

Perfectly Controlled Lamella Thickness and Thickness Distribution: A Morphological Study on ADMET Polyolefins

Satoru Hosoda; Yoshinobu Nozue; Y. Kawashima; S. Utsumi; Tatsuhiro Nagamatsu; Kenneth B. Wagener; Erik B. Berda; Giovanni Rojas; Travis W. Baughman; James K. Leonard


Journal of Polymer Science Part A | 2006

Precision branching in ethylene copolymers: Synthesis and thermal behavior

Erik B. Berda; Travis W. Baughman; Kenneth B. Wagener


Macromolecules | 2005

Circumventing the Reactivity Ratio Dilemma: Synthesis of Ethylene-co-Methyl Vinyl Ether Copolymer

Travis W. Baughman; Eveline Van Der Aa; Stephen E. Lehman; Kenneth B. Wagener


Macromolecules | 2011

Unusual Crystallization Behavior of Polyethylene Having Precisely Spaced Branches

Yoshinobu Nozue; Yasutoyo Kawashima; Shuichiro Seno; Tatsuhiro Nagamatsu; Satoru Hosoda; Erik B. Berda; Giovanni Rojas; Travis W. Baughman; Kenneth B. Wagener


Polymer | 2012

The impact of zinc neutralization on the structure and dynamics of precise polyethylene acrylic acid ionomers: A solid-state 13C NMR study

Janelle E. Jenkins; Michelle E. Seitz; C. Francisco Buitrago; Karen I. Winey; Kathleen L. Opper; Travis W. Baughman; Kenneth B. Wagener; Todd M. Alam

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Karen I. Winey

University of Pennsylvania

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Todd M. Alam

Sandia National Laboratories

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Erik B. Berda

University of New Hampshire

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