A phase i program is proposed to establish injection molding techniques and parameters for molding optical quality parts from optical quality acrylic and polycarbonatemolding materials from domestic commercial sources, using an ungraded existing mod. molding machine conditions for producing high… More

Methylene bis o-chloro aniline has long been recognized as a superior urethane curative but toxicity concerns have limited its use. alternative compounds are available, but they cannot match the handling and ultimate physical properties of moca cured elastomers. an investigations of novel plyamine… More

The present rocket motor liner systems, usually made from the same polymeric materials, used as the binder in the solid propellants are permeable to moisture vapor and to the residual organic liquids and corrosive chemical from the solid propellant. the proposed program will try to decrease this… More

Flame retardant flexible polyurethane foam finds widespread commercial use as a seating material due to its favorable cost, support, and resilience characteristics. however, smoke and toxic gas evolution in the event of fire is a major problem. the goal of this program is to create a fire resistant… More

Potentially toxic microorganisms can grow in activated carbon and ion exchange beds used for post-treatment in spacecraft water recovery systems. ordinary biocides dissolve in water and, if used, would leach from the beds. this project involves bound biocides that would not leach into water or… More

Increasingly, air delivery is being used for field distribution of blood and blood products. the mechanical buffeting that the units experience on impact has resulted in frequent damage, usually to the plastic bags. this problem is most pronounced with the delivery of frozen blood products, where… More

The icing of aircraft wings and other structures during freezing rain conditions has presented a civilian and military problem for many years. icephobic coatings that lower the adhesive bond strength of the ice to the contact surface are perhaps the best approach to this problem. withlow adhesion,… More

The goal of this project is the development of a new paint which is easily applied to underwater structures, and offers long term corrosion protection. the proposed program of phase i will will identify polymers which will be evaluated for application as an underwater corrosion protective coating.… More

The objective of this program is to determine the feasibillity of coating military pipelines with low friction and corrosion inhibiting coatings. corrosion inhibitive coatings will be identified and investigated for applications to both internal and external surfaces of the pipeline. the internal… More

Adhesives currentlyused on airport pavemtns for lighting /electrical installations have dificiencies, and innovative use of other adhesive compounds, or materials, that would provide improved palcement qualities, and increased adhesioncharateristics with asphaltic materials is needed. this proposed… More

Small tears in modacrylic/nylon chemical warfare protective overgarments can be repaired without heat, by use of a patch of the same material, bonded by an adhesive which is pressure-sensitive, latexbased, solvent-activated, 2-part reactive system, or microencapsulated reactive system.

Image intensifier tube assemblies are experiencing failure due to leakage currents along the glass/pottant interface. in moist environments, water penetrates the rtv silicone to this interface, resulting in leakage currents large enough to overwhelm the power supply. this failure is being aggrevated… More

Ammunition componets molded in nylon 6/6 are susceptible to changes in performance following storage in high humidity and temperature enviroments. this is due to the moisture absorption characteristics of this material, which affects dimensions and mechanical properties. further, intimate contact… More

The objective of this research effort is to demonstrate the feasibility of developing new thermosetting plastics based upon cellulose from wood. this phase i effort will explore crosslinking agents such as diepoxides and diisocyanates anddetermine their relative ability to swell and crosslink… More

The goal of this program is a non-leachable non-toxic (to people) permanent sonar done antifouling treatment. this will be achieved by grafting quat monomer to the sur- face of the dome or by treatment with a quat silane to form an interpenetrating network on and just under the surface. there is… More

Most of the cp fabrics under consideration by dod for uniforms contain a liquid barrier which is laminated to the underside of an outer shell fabric. this barrier provides liquid water and agent resistance. during sewing, this barrier becomes perforated inviting penetration by liquid and vaporous… More

This program proposes to develop a specialized floor covering material that is highly resistant to chemical exposure, antistatic, non-particle generating, non-flammable, inexpensive in cost and easy to install and repair. the program systematically evaluates a number of polymeric and elastomeric… More

Over the past twenty years, the navy has been using a castor oil/tdi based urethane foam for ablative wear reducing jackets, to provide endothermic protection to gun barrels and reduce wear caused by excessive heating. presently there is a need to provide formulations based on less toxic and more… More

The urethane, epoxy, and polysulfide primers presently utilized on military aircraft are efficient formulations but are solvent-borne. it is increasingly important to convert to waterborne systems to minimize air pollution in the vicinity of bases applying these coatings. the purpose of this… More

The main objective of this program is to determine the feasibility of developing a thermosetting polymeric adhesive and curing method that will not require cure cycles in an oven or a press at elevated temperatures and pressures. the program will encompass a study of the responsiveness of… More

Effective sealing or resealing of joints in bituminous and cast concrete runways is an old and on-going problem. many of the presently used materials are deficient due to poor adhesion to the pavement, hardening and excessive contracting during exposure to cold weather resulting in pavement cracking… More