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Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

1998

Selected Works

Polymer Science

Articles 1 - 4 of 4

Full-Text Articles in Engineering

Phase Behaviour In Blends Of Poly[Styrene-Co-Ortho(Para)-Bromostyrene] And Phenylsulfonated Poly(2,6-Dimethyl-1,4-Phenylene Oxide) Copolymers, William Macknight, R. Vukovic, G. Bogdanic, A. Erceg, D. Fles, F. E. Karasz Dec 1997

Phase Behaviour In Blends Of Poly[Styrene-Co-Ortho(Para)-Bromostyrene] And Phenylsulfonated Poly(2,6-Dimethyl-1,4-Phenylene Oxide) Copolymers, William Macknight, R. Vukovic, G. Bogdanic, A. Erceg, D. Fles, F. E. Karasz

William MacKnight

Random copolymers of styrene with ortho- or para-bromostyrene differ substantially in their blend behaviour with partly sulfonylated poly(2,6-dimethyl-l,4-phenylene oxide) (SPPO). Copolymers of styrene with ortho­bromostyrene exhibit a very narrow window of miscibility in comparison with styrene-para-bromostyrene copolymer blends with SPPOs. The experimental results can be accounted for on the basis of individual segmental interaction parameters by applying mean-field theory.

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Thermally Stable Silphenylene Vinyl Siloxane Elastomers And Their Blends, William Macknight, H. Dennis Zhu, Simon W. Kantor Dec 1997

Thermally Stable Silphenylene Vinyl Siloxane Elastomers And Their Blends, William Macknight, H. Dennis Zhu, Simon W. Kantor

William MacKnight

No abstract provided.

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Water-Insoluble Complexes Of Poly(L-Lysine) With Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell Dec 1997

Water-Insoluble Complexes Of Poly(L-Lysine) With Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell

William MacKnight

Structures of the water-insoluble complexes of poly(L-lysine) with octyl and octadedecyl
sulfates, and with the mixtures of these surfactants, were examined via X-ray diffraction, infrared
spectroscopy, and differential scanning calorimetry. The solid-state structures of the complexes were
shown to be governed by their compositions. In the stoichiometric poly(L-lysine) complex with octadecyl
sulfate, surfactant chains crystallize on a hexagonal lattice. In the poly(L-lysine)-octyl sulfate complex
of nearly stoichiometric composition, the surfactants are arranged on an alkane-type two-dimensional
lattice. In the complex with 20 mol % octadecyl sulfate and about 75 mol % octyl sulfate, the longer
surfactant chains form hexagonal crystalline …

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Self-Assembled Polyelectrolyte-Surfactant Complexes In Nonaqueous Solvents And In The Solid State, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell Dec 1997

Self-Assembled Polyelectrolyte-Surfactant Complexes In Nonaqueous Solvents And In The Solid State, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell

William MacKnight

No abstract provided.

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