Saturated hydrocarbon polymeric binder for advanced solid propellant Triennial report, 27 Oct. 1965 - 30 Sep. 1968
Developing alkane solid propellant binders
Potts, J. E.↗
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Polymeric Schiff bases. XVII.
Block tractable azomethine copolymers prepared by reaction of insoluble oligomers with monomers or of two different fusible oligomers, noting high thermal stability
Dalelio, G. F.↗
Abiotic polymerization and self-organization.
Cell origin in self organizing natural polymers in terms of molecular evolutionary priority of polynucleotides and poly alpha amino acids
Fox, S. W.↗
Reinforcement of polymeric structures with asbestos fibrils
Investigation determines structural potential of asbestos fibrils. Methods are developed for dispersing macrofibers of the asbestos into colloidal-sized ultimate fibrils and incorporating these fibrils in matrices without causing reagglomeration.
Rader, C. A.↗
Effects of decontamination, sterilization, and thermal vacuum on polymeric products
Adhesives, coatings, coated fabrics, elastomers, encapsulants, films, hardware and structural materials, and tapes are tested in a series of physical, mechanical, and electrical tests. Material properties are measured before and after exposure to the three environments.
Roper, W. D.↗
Difunctional polyisobutylene prepared by polymerization of monomer on molecular sieve
Process yields difunctional isobutylene polymers ranging in molecular weight from 1150 to 3600. These polymers have the potential for copolymerization and cross-linking with other monomers to form elastomeric materials.
Midler, J. A., Jr.↗
Saturated hydrocarbon polymeric binder for advanced solid propellant Quarterly report, 1 Apr. - 30 Jun. 1969
Ethylene/propylene/HMB terpolymers as prepolymer binders for advanced solid propellants
Potts, J. E.↗
Visual appearance of polymeric contamination
Photomicrographs of polymer condensates as spacecraft contaminants
Shapiro, H.↗
A new metalation complex for organic synthesis and polymerization reactions
Organometallic complex of N,N,N',N' tetramethyl ethylene diamine /TMEDA/ and lithium acts as metalation intermediate for controlled systhesis of aromatic organic compounds and polymer formation. Complex of TMEDA and lithium aids in preparation of various organic lithium compounds.
Hirshfield, S. M.↗
Effects of the thermal sterilization procedure on polymeric products
Properties of samples are tested, after thermal exposure, and values are compared with unexposed samples. Thermal stability or compatibility ratings of formulated or compounded organic polymers using trade names are made and degree of change in measured properties is assessed. Products are rated compatible, marginal, or not compatible.
Campbell, B. A.↗
Synthesis of polymeric schiff bases by reaction of acetals and amine compounds Patent
Synthesis of schiff bases for heat shields by acetal amine reactions
Dalelio, G. F.↗
Synthesis of space stable polymeric film formers Final report, 9 Jun. 1970 - 8 Jan. 1971
Synthesis and thermal properties of fluoroaromatic silicon and carbon polymers for space use
Giori, C.↗
Polymeric binder for explosives
Chemical reaction for producing a polymer which can be mixed with explosives to produce a rigid material is discussed. Physical and chemical properties of polymers are described and chemical structure of the polymer is illustrated.
Bissell, E. R.↗
Investigation of the feasibility of developing low permeability polymeric films
The feasibility of reducing the gas permeability rate of Mylar and Kapton films without drastically effecting their flexibility characteristics at cryogenic temperatures was considered. This feasibility was established using a concept of diffusion bonding two layers of metallized films together forming a film-metal-film sandwich laminate. The permeability of kapton film to gaseous helium was reduced from a nominal ten = to the minus 9 power cc-mm/sq cm sec. cm Hg to ten to the minus 13 power cc-mm/ sq cm - sec. cm Hg with some values as low as ten to the minus 15 power cc - mm/sq cm m-sec - cm Hg being obtained. Similar reductions occurred in the liquid hydrogen permeability at -252 C. In the course of the program the permeability, flexibility and bond strength of plain, metalized and diffusion bond film were determined at +25 C, -195 C and -252 C. The cryogenic flexibility of Kapton film was reduced slightly due to the metallization process but no additional loss in flexibility resulted from the diffusion bonding process.
Hoggatt, J. T.↗
Transparent polymeric laminates
Laminate prepared from epoxy-boroxine and phenolphthalein polycarbonate has high mechanical strength at elevated temperature and is resistant to impact, fire, and high-energy thermal radiation. Polycarbonate is prepared by reaction of phenolphthalein with phosgene in presence of amine catalyst and immiscible organic solvent phase.
Parker, J. A.↗
Synthesis of reverse osmosis membranes by plasma polymerization of allylamine.
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Hollahan, J. R.↗
Polymerization of amino acids under primitive earth conditions.
Small amounts of peptides were obtained when equal amounts of methane and ammonia were reacted with vaporized aqueous solutions of C14-labeled glycine, L-alanine, L-aspartic acid, L-glutamic acid and L-threonine in the presence of a continuous spark discharge in a 24-hr cyclic process. The experiment was designed to demonstrate the possibility of peptide synthesis under simulated primeval earth conditions. It is theorized that some dehydration-condensation processes may have taken place, with ammonium cyanide, the hydrogencyanide tetramer or aminonitriles as intermediate products, during the early chemical evolution of the earth.
Flores, J. J.↗
Metallized polymeric foam material
Open-celled polyurethane foams can be coated uniformly with thin film of metal by vapor deposition of aluminum or by sensitization of foam followed by electroless deposition of nickel or copper. Foam can be further processed to increase thickness of metal overcoat to impart rigidity or to provide inert surface with only modest increase in weight.
Birnbaum, B. A.↗