Accession Number : ADA297107

Title :   A Statistical Approach for the Evaluation and Selection of Medium Density Polyethylenes for Chemical Storage Canisters.

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Spagnuolo, David M. ; Dehmer, Peter G. ; Dunn, David ; Petrie, Stephen P.

PDF Url : ADA297107

Report Date : JUN 1995

Pagination or Media Count : 76

Abstract : Several specially compounded and commercially available olefinic materials were investigated in the presence of an organic liquid, Igepal CO-630, to test their environmental stress-crack (ESC) resistance (ASTM D1693). Chemical and physical characterization techniques were used to evaluate the proposed alternate medium density polyethylenes (MDPE) and antioxidants. Molecular weight, amount of antioxidant consumed during processing, and oxidation induction times were determined using size exclusion chromatography (SEC), reverse phase high performance liquid chromatography (RPHPLC), and differential scanning calorimetry (DSC), respectively. In addition, mechanical properties and strengths (ASTM D638) were determined in an attempt to obtain a quicker, more reproducible test. These properties were compared to a baseline material. Results showed that the commercial polyethylene, the baseline material, had the higher resistance to ESC. jg p.3

Descriptors :   *CHEMICALS, *LIQUID CHROMATOGRAPHY, *STATISTICAL PROCESSES, *STORAGE, *CANISTERS, *POLYETHYLENE, *OLEFIN POLYMERS, SCANNING, TEST AND EVALUATION, STRESSES, DENSITY, MECHANICAL PROPERTIES, MATERIALS, RESISTANCE, CRACKS, MOLECULAR WEIGHT, EXTRUSION, BASE LINES, OXIDATION, ORGANIC COMPOUNDS, ENVIRONMENTAL TESTS, REPRODUCIBILITY, ANTIOXIDANTS, INDUCTION SYSTEMS, CALORIMETRY.

Subject Categories : Polymer Chemistry
      Physical Chemistry
      Containers and Packaging
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE