Award Data

PHASE I OF THIS PROJECT WILL INVOLVE SYNTHESIS, CHARACTERIZATION, AND EVALUATION OF NEW MONOMERS AND OF POLYPYRONES SYNTHESIZED FROM THEM. THE OBJECTIVE IS TO DISCOVER NEW POLYMERS THAT MAY BE USEFUL AS MEMBRANES TO SEPATATE GAS MIXTURES IN AN ECONOMIC FASHION. ONE NEW MONOMER (A TETRAAMINE) WILL BE SYNTHESIZED AS WILL FOUR NEW POLYMERS (POLYPYRRONES). THE LATTER WILL BE CHEMICALLY AND PHYSICALLY ...

THIS PROPOSAL DESCRIBES AN SBIR PROJECT TO PREPARE NOVEL PRIMERS FOR BONDING TO UNPREPARED HYDROPHILIC SUBSTRATES SUCH AS STEEL, ALUMINUM, AND TITANIUM AND TO COMPOSITES. THE PRIMERS WILL BE PREPARED FROM ORGANOFUNCTIONAL SILANE AND ZIRCO-ALUMINATE COUPLING AGENTS AND FROM POLYMERIZABLE PHOSPHATE COMPOUNDS AND WILL BE DESIGNED TO REACT WITH MOISTURE AT THE SUBSTRATE SURFACE AND TO REPEL ADDITIONAL ...

THE TORPEDO NOSE WINDOW APPLICATION REQUIRES MATERIALS WITH A UNIQUE COMBINATION OF PROPERTIES. THESE MATERIALS SHOULD BE STRONG, NOT VERY LOSSY, RELATIVELY INERT, ACOUSTICALLY WELL MATCHED TO SEAWATER, INEXPENSIVE, AND EASY TO FABRICATE. SOFT, RELATIVELY LOSSY RUBBERS HAVE BEEN USED SO FAR. TWO TECHNOLOGICAL DEVELOPMENTS OF RECENT YEARS FORESHADOW THE DEVELOPMENT OF IMPROVED MATERIALS WITH VERY L ...

THIS PROJECT WILL IDENTIFY AND SPECIFY ENGINEERING PARAMETERS NECESSARY TO MANUFACTURE NON-METALLIC ELECTRICAL CONNECTORS FOR UNDERWATER SUBMARINE AND SURFACE SHIP SONAR USE. MORE SPECIFICALLY, THIS PROJECT WILL IDENTIFY EQUIPMENT, MATERIALS AND PROCESSES NECESSARY TO ENABLE NAVAL SUPPORT FACILITIES TO MAKE NON-METALLIC UNDERWATER ELECTRICAL CONNECTORS RESISTANT TO CATHODIC DELAMINATION.

TO COMBINE THE CHARACTERISTICS OF THERMAL STABILITY, DIELECTRIC STRENGTH, CLARITY, TRACTABILITY, AND RESISTANCE TO THE AEROSPACEENVIRONMENT, THREE MOIETIES WILL BE INCORPORATED INTO A POLYMER BACKBONE: TETRAPHENYLSILANE, HEXAFLUOROISOPROPYLIDENE, AND OXADIAZOLE. FACILE REACTIONS ARE PROPOSED TO RESULT IN AN HOMOLOGOUS SERIES OF POLYMERS WHICH WOULD ALLOW THE CAREFUL DETERMINATION OF THE RELATIONSH ...

THIS PROJECT IS DESIGNED TO FURNISH FHWA WITH A NUMBER OF IMPORTANT PRODUCTS IN PREPARATION FOR ACCELERATED LIFE TESTING (ALT) OF A LARGE SCALE MODEL JOINT AND A LONG TERM FULL SCALE BEAM TEST TO VERIFY THE ALT. THE MOST IMPORTANT PRODUCT IS A PROCEDURE FOR INTRODUCING DESIRED MOISTURE LEVELS INTO LARGE AREA BONDS IN A RELATIVELY SHORT TIME. A SECOND PRODUCT IS THE ALT PLAN WHICH ACCOUNTS FOR THE ...

THE PROPOSED ACCELERATED LIFE TESTING OF NICKEL HYDROGEN (NI-H) AND NICKEL METAL HYDRIDE (NI-HYDRIDE) BATTERIES USES IMPEDANCE SPECTROSCOPIC METHODS AS A DIAGNOSTIC FOR DETECTION OF AGING AND LIFE LIMITING PROCESSES. IN ADDITION, A THEORETICAL MODEL FOR THERMAL AND DEPTH OF DISCHARGE (DOD) STRESSES AS A MEANS OF ACCELERATING AGING IN THESE BATTERIES IS PROPOSED. THE IMPEDANCE SPECTROSCOPIC APPROAC ...

Sonar transducer mounting hardware installed on current U.S. Navy submarines is constructed from metallic materials that have been found to have costly corrosion problems. Metallic transducer mounting brackets are heavy, are constructed from expensive corrosion resistant metals, use expensive corrosion resistant surface treatments and incur high maintenance costs due to replacement in as little as ...

The integrity of rubber-to-metal bonds is an area of reliability concern, particularly in systems that are exposed to the harsh conditions of the marine environment. Accelerated life testing (ALT) is a technique used to obtain reliability data in a compressed time frame, allowing lifetime performance predictions and failure mode analyses to be made prior to equipment installation. By performing ac ...

A METHOD IS PROPOSED FOR ESTIMATING REMAINING LIFE OF TEFLON COMPOSITE CHEMICAL/BIOLOGICAL (C/B) SUIT AND ENCLOSURE MATERIALS. THE TECHNIQUE IS BASED UPON THE RELATIONSHIP BETWEEN C/B MATERIAL PERMEABILITY RATE AND SURFACE FRACTURE DENSITY OF FATIGUED MATERIAL. DETECTION OF REMAINING LIFE IS MADE USING SPECIAL NDT PENETRANT MEASUREMENTS WHOSE RESULTS ARE CORRELATED TO PERMEATION RATE VIA FRACTURE ...