Polymers and Plastics

Scope: Using an inhibitory format, this immunoassay method, ASTM D6499-12, quantifies the quantity of antigenic latex proteins in solution. ASTM D6499 depicts an immunological strategy for quantitating normal elastic latex proteins.  Procedure In ASTM D6499-12, the latex sample is suspended for two hours in fluid support. The concentrate is recuperated, and the antigen levels are...

ASTM D6484 Open-Hole Compressive Strength of Polymer Matrix Scope: ASTM D6484 is intended to deliver indented compressive strength information for foundational layout allowable, material determinations, innovative work, and quality confirmation. The composite material structures are restricted to continuous fiber or intermittent fiber supported composites in which the cover is offset and symmetric as for the...

Scope: ASTM D5988-18 is intended to be used with any plastic material that does not restrict the growth of bacteria and fungus in the soil. This test technique evaluates the degree of aerobic biodegradation as soil is a valuable source of inoculum for testing the biodegradability of plastics in the environment since it contains so...

ASTM D5526-18 Biodegradation of  Plastic Under Accelerated Landfill Conditions Scope: ASTM D5526-18 is intended to develop combinations of home garbage and plastic materials after various degrees of decomposition under landfill-like settings.The mixtures created by this test technique can be used to assess the environmental and health concerns of landfill-degraded plastic products. Rapid deterioration of plastic...

Scope: ASTM D551-18 is used to determine the percentage of carbon in a sample converted to carbon in the gaseous form under high-solids anaerobic digesters used to treat municipal solid waste. Plastic biodegradation might enable their safe disposal in solid-waste treatment plants, both aerobic and anaerobic. This test procedure is intended to apply to any...

Scope: ASTM D5338-15 assesses the degree and rate of aerobic biodegradation of plastic materials in a controlled composting environment at thermophilic temperatures in a laboratory setting. This test technique is intended to produce reliable and reproducible test findings under controlled circumstances that mimic composting processes, such as thermophilic temperatures.  Procedure: In ASTM D5338-15  an inoculum...

Scope: This test technique ASTM D1042-12 is intended to give way for assessing dimensional changes in plastic specimens, such as shrinkage or expansion, that occur as a result of specific heat and water conditionings. This technique is only designed to be used quickly to detect linear dimensional changes in polymers under controlled settings. Procedure: In...

ASTM D570 Water Absorption of Palstics Scope: In ASTM D570 method, the relative rate of absorption of water by plastics when immersed is determined. This test method is suitable for use with all sorts of plastics, including cast, hot-molded, and cold-molded resinous products, as well as homogeneous and laminated plastics. This rate of water absorption...

Scope: ASTM D7253 is appropriate for quality assurance, specification testing, and research. Acid values reflect the degree to which acids have neutralized the polyol. The results of this procedure are utilized to calculate real hydroxyl numbers as adjustment factors for batch-to-batch uniformity. Procedure In an Erlenmeyer flask, 100 ± 20 mL 2-propanol and 1 mL...

Scope: The ASTM D7252-17 test method is suitable for methylene di(the-nyl isocyanate) (MDI) and polymeric (methylene phenyl isocyanate-nate) (PMDI). This test method is used to characterize isocyanates used in polyurethane goods and for research or quality control. Procedure In ASTM D7252-17, firstly, to make a mixture of methyl urethanes, the material is treated (derivatized) with...

Scope: ASTM D7109-12 test method for evaluating the shear stability of polymer-containing fluids determines the viscosity loss in mm2/s and percent. If the polymers are destroyed by mechanical stress, the viscosity of the fluid decreases. The loss in viscosity signifies a loss in shear stability as a result of polymer degradation.  Test Procedure: The test...

Scope: ASTM D7029-09 covers standard procedures to evaluate the gelation and exotherm curves of polyesters and vinyl ester resins. The “Standard 180 °F (82 .2 °C) Exotherm Curve” is obtained using this test method. On mixing with initiators, polyester and vinyl ester resins undergo polymerization. ASTM D7029-09 helps determine the reactivity of the polyester and...

Scope: ASTM D7028-07 test method defines the procedure to evaluate the dry and wet transition temperature (Tg) for polymer matrix composites. The polymer matrix composites contain high modulus, 20 GPa fibers that are analyzed using the dynamic mechanical analyzer (DMA). Experimental parameters, apparatus used, and the physical property measured affect the glass transition temperature. This...

Scope: ASTM D6845-12 T Test method used for surface area measurement of particle size. This method is used in the silica and rubber industries. Determination of cetyltrimethylammonium bromide adsorption – CTAB (adsorption of large molecules, which cannot enter microspores, it gives information about the effective outer surface that is accessible for rubber molecules) Test Procedure:...

Scope: ASTM D6844-10 test method characterizes silanes of the type bis-(triethoxysilyl-propyl) sulfane by high performance liquid chromatography (HPLC).  Test Procedure: In this test method, a sample of the silane is analyzed by HPLC to determine the polysulfide distribution. Sulfur Chain Distribution calculations are performed using the response factors for the individual silane (sulfur chain length)....