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Selected Works

Selected Works

1979

Articles 1 - 8 of 8

Full-Text Articles in Engineering

Modeling Of Tensile Properties Of Polymer Blends: Ppo/Poly(Styrene-Co-P­ Chlorostyrene), William Macknight, J. R. Fried Dec 1978

Modeling Of Tensile Properties Of Polymer Blends: Ppo/Poly(Styrene-Co-P­ Chlorostyrene), William Macknight, J. R. Fried

William MacKnight

No abstract provided.

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Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka Dec 1978

Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka

William MacKnight

No abstract provided.

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A Dynamic Mechanical Study Of Phase Segregation In Toluene Diisocyanate, Block Polyurethanes, William Macknight, G. A. Senich Dec 1978

A Dynamic Mechanical Study Of Phase Segregation In Toluene Diisocyanate, Block Polyurethanes, William Macknight, G. A. Senich

William MacKnight

No abstract provided.

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A Dynamic Mechanical Study Of The Curing Reaction Of Two Epoxy Resins, William Macknight, G. A. Senich, N. S. Schneider Dec 1978

A Dynamic Mechanical Study Of The Curing Reaction Of Two Epoxy Resins, William Macknight, G. A. Senich, N. S. Schneider

William MacKnight

No abstract provided.

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Poly(Alkylene Oxide) Ionomers Ii: Solution Co- And Terpolymerization Of Trioxane For The Preparation Of Polyoxymethylene Ionomers, William Macknight, L. Demejo, Otto Vogl Dec 1978

Poly(Alkylene Oxide) Ionomers Ii: Solution Co- And Terpolymerization Of Trioxane For The Preparation Of Polyoxymethylene Ionomers, William Macknight, L. Demejo, Otto Vogl

William MacKnight

Solution polymerization of trioxane (TO) with l,3-dioxolane {DO) gave copolymers of various comonomer compositions. TO was also copolymerized with ethyl glycidate (EG) and terpolymerized with DO and EG to polymers of low EG content. The copolymers were acetate endcapped or base treated to give stable co- and terpolymers. The treatment of EG containing polyoxymethylene (POM) copolymers with sodium hydroxide in methanol at elevated temperatures gave POM ionomers. The polymers were characterized by their infrared and PMR spec­tra for their general structure and co-and terpolymer composition. POM co­polymers with only EG as comonomer showed low base stability but those which contained …

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Compatible Glassy Polyblends Based Upon Poly(2,6-Dimethyl-1, 4-Phenylene Oxide): Tensile Modulus Studies, William Macknight, Lothar W. Kleiner, F. E. Karasz Dec 1978

Compatible Glassy Polyblends Based Upon Poly(2,6-Dimethyl-1, 4-Phenylene Oxide): Tensile Modulus Studies, William Macknight, Lothar W. Kleiner, F. E. Karasz

William MacKnight

The mechanical behavior of compatible glassy polyblends based upon poly(2,6-dimethyl-l,4-phenylene oxide) (PPO) was investigated. In particular, the influence of composition, molecular weight, and molecular weight distribution upon the tensile modulus of the blend was assessed. Various possible correlations between the experimentally determined moduli and theory are considered. Included are correlations with den­sity, packing density, composite theory, and lattice fluid theory. The modeling of the properties of mixtures via Simplex lattice design is also presented. Finally, attention is given to the development of compatibility criteria based upon tensile modulus and density measurements. 

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Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz Dec 1978

Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz

William MacKnight

Polypentenamer has been sulfonated using a 1:1 complex of sulfur trioxide and triethyl phosphate in chloroform. A range of polymers containing from 1.9 to 19. l mo! % sulfonate groups was prepared by this reagent and isolated in the form of sodium salts. These materials are initially free from covalent cross-links but cross-linking occurs with aging unless the polymers are stabilized with a free-radical scavenger such as hydroquinone. The unsaturated bonds in these materials can be removed by hydrogenation with p­toluenesulfonyl hydrazide. The hydrogenated derivatives are crystalline and no longer require a stabilizer to inhibit cross-linking. Both the unsaturated and …

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Present Understanding Of The Viscoelastic And Mechanical Properties Of Stereoregular Polymers, William Macknight Dec 1978

Present Understanding Of The Viscoelastic And Mechanical Properties Of Stereoregular Polymers, William Macknight

William MacKnight

No abstract provided.

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