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Aug 18, 1927 |
Polymerization of ethylene
Polymerization of ethylene is effected by C. Epner through
the action of dark or silent electric discharge at ordinary
or raised temperatures to produce a product containing both
saturated and unsaturated hydrocarbons.
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Oct 1927 |
First preparation of higher polypropylene glycols
P.A. Levene and A. Walti achieve the first preparation of
the higher polypropylene glycols.
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Nov 08, 1927 |
Airplane panel material
W.A. Wirz, British Celanese, Ltd., develops a process
whereby perforated sheet-metal plates are placed between
sheets of a cellulose acetate compound which penetrates the
perforations of the metal after heat and pressure are
applied to produce an airplane panel material.
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Dec 1927 |
Demonstration that a lattice will diffract an electron beam
C. Davisson and L.H. Germer, Bell Telephone Laboratory,
demonstrate that a lattice will diffract an electron beam,
a discovery which greatly augments diffraction methods for
the determination of lattice structure. Davisson later
receives Nobel Prize for his work.
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Dec 27, 1927 |
An adhesive suitable for use on metals
F.S. Malm describes an adhesive, consisting of rubber,
rosin, rosin oil, and a fibrous filler including asbestos,
which is suitable for use on metals.
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1928 |
Chromium content in nickel-chromium compounds studied
C.J. Smithels, S.V. Williams, and J.W. Avery report that
although oxidation resistance increased in nickel-chromium
compounds as the chromium content increased from 20% to
30%, the strength at temperatures above 750 degrees C
decreased with increasing chromium content.
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Feb 01, 1928 |
Electrostatic forces of attraction between particles
In investigating the nature of cohesion, J.E. Lennard-Jones
and B.M. Dent quantitatively analyze the electrostatic
forces of attraction between particles.
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Mar 23, 1928 |
Adhesion with vinyl compounds
J.F. Walsh and A.F. Caprio, Celluloid Corporation, place
unpolymerized or partially polymerized vinyl compounds
between two surfaces and produce adhesion by polymerizing
with suitable catalysts.
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Apr 1928 |
Differentiation between true hysteresis and elastic after-effect
L. Prandtl differentiates between true hysteresis and
elastic after-effect, and also postulates the existence of
what us now known as an edge or line of dislocation.
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Apr 01, 1928 |
Duralumin sheet studied
Duralumin sheet quenched in hot water has greater
susceptibility to intercrystalline attack than when
quenched in cold water, according to research done by H.S.
Rawdon.
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May 22, 1928 |
Process for protecting duralumin alloys patented
E.H. Dix, Jr., Alcoa, patents a process for protecting
alloys of the duralumin type against corrosion by coating
the strong alloy sheet on each side with a layer of
aluminum of high purity.
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Jul 03, 1928 |
Nickel alloy for high-speed tools patented
R. Franks and B.E. Field, Haynes Stellite Company, receive
a patent for a nickel alloy comtaining 3-5% aluminum, 3.5-
6% silicon, 5-12% tungsten, 6-12% zirconium, and 1% or less
boron, described as suitable for high-speed tools.
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Jul 19, 1928 |
Patent for modifying phenol-formaldehyde condensation products
I.G. Farben receives a patent for modifying phenol-
formaldehyde condensation products with cellulose ethers to
control hardening, as in the preparation of experimental
laminated structures.
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Jul 27, 1928 |
Synthetic resin containing ethers patented
W.E. Lawson, Imperial Chemical Industries, patents a
synthetic resin containing ethers similar to the "glyptal"
type prepared by heating polybasic carboxylic acids or
anhydrides with ether alcohols to 175-250 degrees C to
obtain complete estrification.
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Sep 11, 1928 |
Nickel alloy for high-speed tools patented
R. Franks and B.E. Field, Haynes Stellite Company, receive
a patent for a nickel alloy suitable for high-speed tools
and containing 3-5% aluminum, 3.5-6% silicon, 5-12%
tungsten, 6-12% titanium, and up to 1% boron.
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Sep 22, 1928 |
Water-insoluble bonders process patented
I.G. Farben patents a process whereby water-insoluble or
poorly soluble bonders such as ethyl cellulose are formed
into an aqueous dispersion which is sprayed, kneaded, etc.,
and may then be dried and treated with substances capable
of dissolving or swelling the binding agent.
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Nov 02, 1928 |
Adhesives for safety glass manufactures
A process is developed by British Celanese, Ltd., in which
phenol or creosol-formaldehyde resins are modified with
cellulose esters, acetate, and nitrate, as well as a
plasticizer. The process is useful in the preparation of
adhesives for safety glass manufactures.
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Dec 01, 1928 |
High-strength, low-alloy silicon-manganese steel
A.B. Kinzel, Union Carbide, introduces a high-strength, low-
alloy silicon-manganese steel with improved susceptibility
to heat treatment due to the addition of 1% carbon.
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1929 |
New developments in nickel alloys
B.E. Field, Union Carbide, describes new developments in
nickel-molybdenum-iron, nickel-silicon, and nickel-aluminum
alloys of high corrosion resistance, the first two showing
good high-temperature properties.
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1929 |
Age-hardening of duralumin
M.L.V. Gaylor and G.D. Preston ascribe age-hardening of
duralumin to the distortion of the space lattice caused by
precipitation of highly dispersed particles. The
precipitation involves the resection of the atoms of the
dissolved metal from the lattice of the solid solution
(possibly with formation of molecules) and the coagulation
of the rejected atoms or molecules.
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