Physical tests

Physical-property tests are used to measure the properties of adhesives in the liquid or gelled states prior to curing and in the solid state after curing. Tests for the uncured state such as viscosity, visual examination, and surface energy or contact angle assure that fillers, if used, have not settled out, that the material has not exceeded its pot life or shelf life, and that the supplier has not changed the formulation. Visual examination and density after cure are performed to verily that voids are not present or, if present, meet specification requirements. Finally, light transmission and index of refraction measurements are important for adhesives used in optoelectronic applications. [Pg.395]

Physical Electrical Environmental Thermal Mechanical/Thermo- mechanical Chemical Analysis [Pg.396]

Physical Electrical Environmental Thermal Meehan ical/Thermo-mechanical Chemical Analysis [Pg.397]

Visual (MIL-STD-883, Methods 5011 and 2017) Electrical stability (biased) (MSFC SPEC 592, Method4.5.11) Moisture absorption (IPC-TM-650, TM 2.6.3.1, and ASTM D570) Bond strength tensile pull (ASTM D1002), die shear (MIL-STD-883, Method 2019), flip-chip stroigth (MIL-STD-883, Method 2031), substrate strength (MIL-STD-883, Mediod 2017), and centrifuge (MIL-STD-883, Method 2001) Residual gas analysis (MIL-STD-883, Method 1018) [Pg.397]

Light transmittance (ASTMDl 003-00) Current carrying ability, interconnect resistance (N/A) Hydrolytic stability (IPC-TM-650, TM2.3.10) Voids, delamination (acoustic miciDScq y) (MIL-STD-883, Method 2030) Total mass loss, water vapor recovery, and volatile condensable materials (ASTM E595) [Pg.397]

Ideally, the same physical tests as used in the natural ageing programme would have been used to monitor changes but the volume of work that would have entailed was prohibitive. Hence, the following properties were selected [Pg.3]

Before exposure and at the end of each period of natural ageing, it was intended that the following tests were to be made, where possible in accordance with the relevant part of BS 903 current at the beginning of the project [Pg.2]

Volume change after 14 days in 75/25 iso-octane/toluene at 40°C, [Pg.2]

Natural Ageing of Rubber - Changes in Physical Properties Over 40 Years [Pg.2]

Despite the changes in test equipment and in the standard methods since the start of the programme every effort has been made to use the original test procednre at each stage. [Pg.3]

Tests after accelerated ageing were also conducted at the start of the work but these were only single temperature exposure. A full accelerated ageing programme is now being carried out on re-mixed materials. [Pg.3]

It is most important that the catalyst be strong enough to resist breakage and attrition. Fixed bed and tubular reactors are carefully filled with catalyst to ensure that the pellets or granules are not damaged and pack with a uniform density. [Pg.14]

Strength is particularly important in processes in which catalysts are circulated continuously between the reactor and a regenerator. In the fluid catalytic cracking process significant daily additions of catalyst must be made to compensate for losses through attrition as well as catalyst deactivation. [Pg.14]

Testing. Chemical analyses are done on all manufactured abrasives, as well as physical tests such as sieve analyses, specific gravity, impact strength, and loose poured density (a rough measure of particle shape). Special abrasives such as sintered sol—gel aluminas require more sophisticated tests such as electron microscope measurement of a-alumina crystal si2e, and indentation microhardness. [Pg.13]

Physical testing appHcations and methods for fibrous materials are reviewed in the Hterature (101—103) and are generally appHcable to polyester fibers. Microscopic analyses by optical or scanning electron microscopy are useful for evaluating fiber parameters including size, shape, uniformity, and surface characteristics. Computerized image analysis is often used to quantify and evaluate these parameters for quaUty control. [Pg.332]

American Leather Chemists Association c/o University of Cincinnati Cincinnati, Ohio 45221 Chemical and physical test methods for leather... [Pg.25]

D. R. Ireland, in R. E. Evans, ed.. Physical Testing ofPlastics-Correlation with End-Use Performance, ASTM STP 736, ASTM, Philadelphia, Pa., 1981, pp. 45-58. [Pg.159]

Scrap from municipal refuse may be in the form of source-separated steel cans, a mixed ferrous fraction, metal magnetically separated from mixed waste or incinerator ash, and C D debris. An ASTM specification (E1134-86) was developed in 1991 for source-separated steel cans. The Steel Recycling Institute has a descriptive steel can specification entitled "Steel Can Scrap Specifications". PubHshed standards for municipal ferrous scrap also include ASTM E701-80, which defines chemical and physical test methods, and ASTM E702-85 which covers the chemical and physical requirements of ferrous scrap for several scrap-consurning industries. [Pg.556]

C473-87a Physical Testing of Gypsum Board Products ... [Pg.423]

The analysis of siUcon carbide involves identification, chemical analysis, and physical testing. For identification, x-ray diffraction, optical microscopy, and electron microscopy are used (136). Refinement of x-ray data by Rietveld analysis allows more precise deterrnination of polytype levels (137). [Pg.468]

In the United States, a number of physical tests are performed on siUcon carbide using standard AGA-approved methods, including particle size (sieve) analysis, bulk density, capillarity (wettabiUty), friabiUty, and sedimentation. Specifications for particle size depend on the use for example, coated abrasive requirements (134) are different from the requirements for general industrial abrasives. In Europe and Japan, requirements are again set by ISO and JSA, respectively. Standards for industrial grain are approximately the same as in the United States, but sizing standards are different for both coated abrasives and powders. [Pg.468]

Physical testing Any process involving an actual test in order to obtain results. [Pg.1466]

All packing materials produced at PSS are tested for all relevant properties. This includes physical tests (e.g., pressure stability, temperature stability, permeability, particle size distribution, porosity) as well as chromatographic tests using packed columns (plate count, resolution, peak symmetry, calibration curves). PSS uses inverse SEC methodology (26,27) to determine chromatographic-active sorbent properties such as surface area, pore volume, average pore size, and pore size distribution. Table 9.10 shows details on inverse SEC tests on PSS SDV sorbent as an example. Pig. 9.10 shows the dependence... [Pg.288]

Physical tests of film impedance using an a.c. bridge have also been recommended, although the correlation with corrosion resistance is necessarily empirical. Film impedance increases at an approximately linear rate with sealing time and film thickness. [Pg.698]

The performance of organic finishes on test is evaluated by visual observation and by physical tests made upon coated specimens that have been exposed for various periods of time to natural or accelerated weathering conditions. Electrical tests are sometimes used on immersed specimens. [Pg.1081]

Physical tests appropriate for this type of evaluation are not necessarily limited to those properties which the coating may be called upon to display in service. A coating that shows a decrease in distensibility from 20 to 10% is still quite capable of withstanding the expansion and contraction of the substrate in atmospheric temperature cycling, yet such a coating can be expected to fail in service earlier than one which shows no decrease. Thus,... [Pg.1081]

It would be desirable to make sample prototype tooling and analyze the flow effects on a product that is likely to present a flow problem. In addition to the usual physical testing of the product, the use of photo-stress analysis techniques plus the exposure to selected solvents to check for stress crack characteristics would lead to changes in the product to minimize the effects of the molding on the product performance. As an example there have been cases in the past where piano keys with frozen-in stresses have been released from perspiration, leaving open flow lines (Chapter 5, STRESS ANALYSIS). [Pg.280]

Tiffany, Physical Testing of Explosives at the Bureau of Mines Explosives Experiment Station, Bruceton, Pa , US Bureau of Mines Bull 346 (1931), 60-63 126-133... [Pg.140]

MacDougall, Methods of Physical Testing , OSRD 804 (Aug 1942) 5) G.H. Messerly,... [Pg.157]

E.G, Eyster, Physical Testing of Explosives, Part III—Miscellaneous Tests for Sensitivity and Performance , OSRD 5746 (Dec 1945)... [Pg.158]

For this particular product, in addition to a decrease in analysis time, a non-destructive method is especially desirable because of other physical tests that are also required on each sample By FNAA, the total nitrogen content of a sample is first detd and then related to compn of the mixture. Since Octols contain no ingredients other than pure TNT (18.50% N) and pure HMX (37.84%), the following linear relationship is derived from the ealed nitrogen content of each ingredient ... [Pg.359]

Pendulum, Ballistic, Test. See under Physical Tests in Vol 1, VII to VIII (Also see A. Schmidt, Explosivst 1962, 23-34)... [Pg.556]

Report 58 Physical Testing of Ruhher, R.R Brown, Rapra Technology Ltd. [Pg.131]

Report 60 Physical Testing of Thermoplastics, S.W. Hawley, Rapra Technology Ltd. [Pg.131]

Spectrophotometry Chromatographic methods Thermal analysis techniques Gas transmission analysis Physical test methods Miscellaneous techniques... [Pg.598]

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