New class of thermosetting plastics has improved strength, thermal and chemical stability

New class of thermosetting plastics has high hydrocarbon content, high stiffness, thermal stability, humidity resistance, and workability in the precured state. It is designated cyclized polydiene urethane, and is applicable as matrices to prepare chemically stable ablative materials for rocket nose cones of nozzles

Ablative resin Patent

Ablative resins used for retarding regression in ablative materia

Polyimide polymers provide improved ablative materials

Principle heat absorption of silica-reinforced plastic ablative materials occurs from the in-depth reaction of silica with carbon to form silicon monoxide and carbon monoxide. The higher the degree of completion of this reaction, the higher the capacity of the ablative material to absorb heat

Polyimide polymers provide higher char yield for graphitic structures

Technique for manufacture of graphite composites uses high-char-forming processable polyimide resin systems to produce the graphitic matrix. Only three cyclic steps are required to yield a 99.7 percent graphite product

The Unknown Soldier in the 21st Century: War Commemoration in Contemporary Canadian Cultural Production

Over the past two decades, expressions of Canadian national identity have become increasingly militarized in cultural production in the commemorative works that have been created, renovated, or re-inscribed in Canada or in important Canadian international sites such as the Vimy Memorial in France. An integral component to this militarization is the paradoxical figure of the Unknown Soldier, both a man and a symbol, known and unknown, individualized and universal. Despite its origins in Europe after the First World War, the Unknown Soldier Memorial tradition has been reinvigorated in a Canadian context in the twenty-first century because it elevates white masculine heroism while curtailing criticism of military praxis. Its contradictory nature provides an informative filter through which to view both recent reflections and commemorations of the First World War and to Canada’s recent military role in Afghanistan. In this dissertation, I examine the works of Jane Urquhart, Jack Hodgins, and Joseph Boyden in relation to their exploration of war commemoration. Each chapter analyzes a novel that addresses war and its commemorative impact in relation to other forms of comparable and relevant cultural production. Chapter 1 examines the connections between Urquhart’s The Stone Carvers and the new Canadian War Museum. Chapter 2 evaluates Hodgins’s Broken Ground and Paul Gross’s film Passchendaele in terms of the works’ pedagogical focus. Chapter 3 addresses Boyden’s Three Day Road and commemorative approaches that are inclusive of Indigenous experiences. Chapter 4 considers Urquhart’s Sanctuary Line in relation to the Highway of Heroes phenomenon

Investigation of resin systems for improved ablative materials Final report, 19 Jun. 1964 - 31 Jul. 1965

Resin systems investigated for improving ablative materials for use with fluorine-containing liquid propellant system

Investigation of resin systems for improved ablative materials

Resin systems for matrix material in ablative composite for liquid rocket combustion chambers using fluorine-containing propellant

Investigation of resin systems for improved ablative materials Interim report, 10 Jan. - 1 Jul. 1966

Preparation, and evaluation of polyimide sulfone resins, graphite-silica reinforced polyamide resins, and resin resistance to FLOX- methane, and fluorine-hydrogen fuel

Reinforced structural plastics

Reinforced polyimide structures are described. Reinforcing materials are impregnated with a suspension of polyimide prepolymer and bonded together by heat and pressure to form a cured, hard-reinforced, polyimide structure

An experimental feasibility study for the preparation of thermo-oxidatively stable Pyrrone laminates

Synthesis of Pyrrone laminates from sulfone dianhydrid