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Polymer Science

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Selected Works

1986

Articles 1 - 13 of 13

Full-Text Articles in Entire DC Network

Structure And Applications Of Ion-Containing Polymers, William Macknight Dec 1985

Structure And Applications Of Ion-Containing Polymers, 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(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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Miscible Blends Of Aromatic Polybenzimidazoles And Aromatic Polyimides, William Macknight, Louis Leung, David J. Williams, F. E. Karasz Dec 1985

Miscible Blends Of Aromatic Polybenzimidazoles And Aromatic Polyimides, William Macknight, Louis Leung, David J. Williams, F. E. Karasz

William MacKnight

A new family of high performance, miscible polymer blends based on aromatic polybenzimidazoles and aromatic polyimides has been discovered. Preliminary evidence, obtained with commercially available, soluble poly­mers suggests that polymers of these generic types may be miscible over a wide range of compositions and structural variations. Blend miscibility 
was evidenced in the form of single Tg's and well-defined single tan 6 relaxations intermediate to those of the component polymers, the formation 
of clear films and, in one case, enhanced solvent resistance. 

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Synthesis And Properties Of Carboxylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Its Ionomer, William Macknight, Yuhui Huang, Guangmin Cong Dec 1985

Synthesis And Properties Of Carboxylated Poly(2,6-Dimethyl-1,4-Phenylene Oxide) And Its Ionomer, William Macknight, Yuhui Huang, Guangmin Cong

William MacKnight

No abstract provided.

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Compatibility In Chlorinated Poly(Vinyl Chloride)/Poly(Ethylene-Co-Vinyl Acetate) Blends, William Macknight, Tomoo Shiomi, F. E. Karasz Dec 1985

Compatibility In Chlorinated Poly(Vinyl Chloride)/Poly(Ethylene-Co-Vinyl Acetate) Blends, William Macknight, Tomoo Shiomi, F. E. Karasz

William MacKnight

No abstract provided.

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Rheology Of Model Polyurethanes At The Gel Point, William Macknight, Francois Chambon, Zoran S. Petrovic, H. Henning Winter Dec 1985

Rheology Of Model Polyurethanes At The Gel Point, William Macknight, Francois Chambon, Zoran S. Petrovic, H. Henning Winter

William MacKnight

The universality of the gel equation, a recently suggested rheological equation for polymers at the gel point, was tested on three well-defined cross-linking polyurethanes (PU). Stoichiometric amounts of triisocyanate cross-linker (DRF) were mixed with a,w-dihydroxypoly(propylene oxides) (PPO) of nominal molecular weights 425, 1000, and 2000. As the cross-linking reaction progressed at 30 °C the evolution of the viscoelastic properties was measured. At the gel point, the storage modulus G' and the loss modulus G" were found to be congruent and proportional to w112, where w is the frequency of the oscillatory shear experiment. The same behavior was previously observed with …

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Small-Angle X-Ray Investigation Of Morphological Order In The System Isotactic Polystyrene-Poly(2,6-Dimethylphenylene Oxide), William Macknight, W. Wenig, F. E. Karasz Dec 1985

Small-Angle X-Ray Investigation Of Morphological Order In The System Isotactic Polystyrene-Poly(2,6-Dimethylphenylene Oxide), William Macknight, W. Wenig, F. E. Karasz

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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Upper And Lower Critical Solution Temperature Behavior In Thermoplastic Polymer Blends, William Macknight, Guangmin Cong, Yuhui Huang, F. E. Karasz Dec 1985

Upper And Lower Critical Solution Temperature Behavior In Thermoplastic Polymer Blends, William Macknight, Guangmin Cong, Yuhui Huang, F. E. Karasz

William MacKnight

No abstract provided.

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On Blends Of Poly(Vinylidene Fluoride) And Poly(Vinyl Fluoride), William Macknight, Gaetano Guerra, F. E. Karasz Dec 1985

On Blends Of Poly(Vinylidene Fluoride) And Poly(Vinyl Fluoride), William Macknight, Gaetano Guerra, F. E. Karasz

William MacKnight

 Experimental evidence indicating immiscibility of the homopolymers poly(vinylidene fluoride) and poly(vinyl fluoride), both in the crystalline and amorphous phases, is presented. The X-ray analysis of the blended samples reveals patterns that are relatively insensitive to blend composition and that are similar to those found in previous studies. However, corresponding differential scanning calorimetry scans show well-defined and separate melting peaks of the component homopolymers, indicating immiscibility in the crystalline phase. In addition, the dynamic mechanical analysis indicates that the main relaxations of the two pure homopolymers are still present in the blend spectrum, implying also an immiscibility of the amorphous phase. 

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Structure-Property Relationships Of Segmented Polyurethanes Containing Monodisperse 2,4-Toluene Diisocyanate/Butanediol Hard Segments, William Macknight, B. Fu, N. S. Schneider Dec 1985

Structure-Property Relationships Of Segmented Polyurethanes Containing Monodisperse 2,4-Toluene Diisocyanate/Butanediol Hard Segments, William Macknight, B. Fu, N. S. Schneider

William MacKnight

No abstract provided.

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Classifications Of Experimental Methods On Polymer Compatibility, William Macknight, Saburo Akiyama Dec 1985

Classifications Of Experimental Methods On Polymer Compatibility, William Macknight, Saburo Akiyama

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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