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Selected Works

Polymer Science

Copolymers

Articles 1 - 10 of 10

Full-Text Articles in Engineering

Phase Behavior In Copolymer Blends Of Poly(P-Chlorostyrene-Co-O-Chlorostyrene) And Phenylsulfonylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide), William Macknight, R. Vukovic, G. Bogdanic, Vjera Kuresevic, M. Tomaskovic, F. E. Karasz Dec 1993

Phase Behavior In Copolymer Blends Of Poly(P-Chlorostyrene-Co-O-Chlorostyrene) And Phenylsulfonylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide), William Macknight, R. Vukovic, G. Bogdanic, Vjera Kuresevic, M. Tomaskovic, F. E. Karasz

William MacKnight

The miscibility of random copolymers of o-chlorostyrene and p -chlorostyrene [ P (oC1Stco-
pC1St)] with partially phenylsulfonylated poly (2,6-dimethyl-1,4-phenylenoex ide)
( SPPO) copolymers has been studied, using differential scanning calorimetry (DSC) to
establish Tg behavior. It already has been established that the isomeric effect of the chlorine
substitution on miscibility is large. Thus the para-chloro-substituted styrenic homopolymer
is miscible with all SPPOs containing more than - 5 mol % phenylsulfonylation, whereas
the ortho-chloro-substituted homopolymer is immiscible with the entire range of SPPO
copolymer compositions (and also with the respective homopolymers) . As a result of this
asymmetric behavior of the …

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The Preparation And Properties Of Zinc Coordination Complexes Of Poly(4-Vinylpyridine-Co-N-Butyl Methacrylate) Copolymers, William Macknight, Mihailo Jacovic, Ivan Perovic, R. W. Lenz Dec 1987

The Preparation And Properties Of Zinc Coordination Complexes Of Poly(4-Vinylpyridine-Co-N-Butyl Methacrylate) Copolymers, William Macknight, Mihailo Jacovic, Ivan Perovic, R. W. Lenz

William MacKnight

Two poly(4-vinylpyridine-co-n-butyl methacrylate) copolymers containing 14.2 and 30.0 mo!% of 4-vinylpyridine residues were prepared by free radical copolymerization reactions. Insoluble complexes were obtained for each copolymer by reaction with zinc chloride. The coordination complexes obtained had a molar ratio of 4-vinylpyridine residues to zinc atoms close to 2 in both cases. The rheological behavior of each of these complexes has been compared to that of the corresponding metal-free copolymers, which were recovered by decomplexation. The metal com­plexed polymers exhibited much higher glass transition temperatures and much longer high temperature relaxation times than the corresponding uncomplexed copolymers. 

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Effect Of Pressure On Phase Behavior In Polymer Blends Of Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Poly(O-Fluorostyrene-Co-P-Fluorostyrene) Copolymers, William Macknight Dec 1985

Effect Of Pressure On Phase Behavior In Polymer Blends Of Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Poly(O-Fluorostyrene-Co-P-Fluorostyrene) Copolymers, William Macknight

William MacKnight

No abstract provided.

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Effect Of Pressure On Phase Behavior In Polymer Blends Of Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Poly(Styrene-Co-P-Fluorostyrene) Copolymers, William Macknight, Yoji Maeda, F. E. Karasz, R. Vukovic Dec 1985

Effect Of Pressure On Phase Behavior In Polymer Blends Of Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Poly(Styrene-Co-P-Fluorostyrene) Copolymers, William Macknight, Yoji Maeda, F. E. Karasz, R. Vukovic

William MacKnight

No abstract provided.

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Compatibility In Blends Of Two Random Copolymers Having A Common Monomer Segment, William Macknight, Tomoo Shiomi, F. E. Karasz Dec 1985

Compatibility In Blends Of Two Random Copolymers Having A Common Monomer Segment, William Macknight, Tomoo Shiomi, F. E. Karasz

William MacKnight

Miscibility in blends of random copolymers (A.,B1-:r),.,_ and (CyB1-y)111 can conveniently be displayed as domains in a Cartesian coordinate system in which the abscissa and ordinate represent the compositions of the respective copolymers. For the case in which the two copolymers have a common monomer unit (e.g., B) the isothermal boundary between domains of miscibility and immiscibility in a mean field treatment is determined by three segmental interaction parameters, XAB, XAC, and XBC, and the degrees of polymerization r1 and r2 of the copolymers. We have termed such representations "miscibility maps". The shape and size of the miscibility domain are …

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Stereoregular Poly(Alkyl Methacrylate)S: Polymer-Polymer And Copolymer-Polymer Blends, William Macknight, J. A. Schroeder, F. E. Karasz Dec 1984

Stereoregular Poly(Alkyl Methacrylate)S: Polymer-Polymer And Copolymer-Polymer Blends, William Macknight, J. A. Schroeder, F. E. Karasz

William MacKnight

No abstract provided.

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Compatibility Of Some Fluorosubstituted Styrene Polymers And Copolymers In Blends With Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And With Polystyrene, William Macknight, Radivoje Vukovic, F. E. Karasz Dec 1982

Compatibility Of Some Fluorosubstituted Styrene Polymers And Copolymers In Blends With Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And With Polystyrene, William Macknight, Radivoje Vukovic, F. E. Karasz

William MacKnight

No abstract provided.

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Dielectric Relaxation Of Poly(Chlorostyrenes) And Their Copolymers In The Primary Transition Region, William Macknight, P. Alexandrovich, F. E. Karasz Dec 1979

Dielectric Relaxation Of Poly(Chlorostyrenes) And Their Copolymers In The Primary Transition Region, William Macknight, P. Alexandrovich, F. E. Karasz

William MacKnight

No abstract provided.

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Structure And Properties Of Ethylene-Methacrylic Acid Copolymers And Their Sodium Salts: Dielectric And Proton Magnetic Relaxation Studies, William Macknight, B. E. Read, E. A. Carter, T. M. Connor Dec 1968

Structure And Properties Of Ethylene-Methacrylic Acid Copolymers And Their Sodium Salts: Dielectric And Proton Magnetic Relaxation Studies, William Macknight, B. E. Read, E. A. Carter, T. M. Connor

William MacKnight

No abstract provided.

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Properties Of Ethylene - Methacrylic Acid Copolymers And Their Sodium Salts: Infrared Studies, William Macknight, L. W. Mckenna, B. E. Read Dec 1966

Properties Of Ethylene - Methacrylic Acid Copolymers And Their Sodium Salts: Infrared Studies, William Macknight, L. W. Mckenna, B. E. Read

William MacKnight

An infrared spectroscopic investigation of ethylene-methacrylic acid copolymers and their sodium salts has been carried out. All the copolymers studied were based on a parent copolymer containing 4.1 mol % of methacrylic acid groups. This was then neutralized to various e;d;ents (from O to 78%) with sodium hydroxide. The per cent ionization was determined from the integrated absorbance of the 1700 cm -1 un-ionized carbonyl stretching band. Temperature-dependent infrared studies showed that the behavior of the un-ionized acid groups over the entire range of ionization is quantitatively comparable to that of low molecular weight car­boxylic acids in nonpolar solvents. A …

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