Wet Chemistry Testing

Polyhedron Laboratories performs wet chemistry testing according to ASTM standards, such as Acrylic Acid (ASTM D4094), % Ash (ASTM D297), % Carbon Black (ASTM D297, Part 38 and ASTM D1603) and Isocyanate Amine Equivalence (ASTM D5155). Polyhedron also offers additional wet chemistry testing including Double Bonds by m-chloroperoxybenzoic Acid Oxidation and High Pressure Polymer Hydrolysis and Titration for Percentage Acid. All ASTM standard descriptions below are paraphrased from the ASTM website (www.astem.org). Due to copyright restrictions, Polyhedron Laboratories cannot make available copies of standards. Standards can be found and are available at www.astm.org.

ASTM D4094-00 - Standard Test Method for Acid Content of Ethylene-Acrylic Acid Copolymers - This test procedure deals with the determination of the acid content of ethylene-acrylic acid (EAA) copolymers with 2.5 to 25% weight of acrylic acid.

ASTM D297-93e2 - Standard Test Methods for Rubber Products-Chemical Analysis - These test procedures deal with the quantitative and qualitative analysis (including ash analysis and fillers analysis, including % Carbon Black) of the composition of rubber products. Many of these test routines can be used for the analysis of synthetic and natural crude rubbers.

ASTM D1603-06 - Standard Test Method for Carbon Black Content in Olefin Plastics - This test procedure deals with the determination of the carbon black content in polypropylene, polyethylene, and polybutylene plastics. Determinations of carbon black content are completed gravimetrically after pyrolysis of the specimen under nitrogen.

ASTM D5155-01 - Standard Test Methods for Polyurethane Raw Materials Determination of the Isocyanate Content of Aromatic Isocyanates - These test procedures determine the isocyanate content of aromatic isocyanates used as polyurethane raw materials. Test Procedure A - Unheated toluene-dibutylamine establishes the amount of toluene diisocyanate in refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. If other isomers are present, they will be included in the determination. This test routine can also be applied to other isocyanates of suitable solubility and reactivity. Test Procedure B - Heated toluene-dibutylamine establishes the amine equivalent of modified or crude isocyanates derived from methylenebis-(4-phenylisocyanate), toluene diisocyanate and polymethylene polyphenylisocyanate. Test Method C - Unheated trichlorobenzene-toluene-dibutylamine establishes the isocyanate content of modified or crude isocyanates derived from methylenebis(4-phenylisocyanate), toluene diisocyanate, and polymethylene polyphenylisocyanate. This test procedure can also be used to evaluate isomer mixtures of methylenebis(phenylisocyanate) and toluene diisocyanate.