Accession Number : ADA306754

Title :   Factors Affecting Sonic Degradation of Polymer Solutions.

Descriptive Note : Technical rept.,

Corporate Author : ROCK ISLAND ARSENAL IL

Personal Author(s) : LeMar, Ralph L.

PDF Url : ADA306754

Report Date : MAY 1967

Pagination or Media Count : 19

Abstract : Linear polymers dissolved in mineral oil were examined for their lability to shear degradation utilizing a sonic oscillator. The tests were performed on several polyisobutylenes and polymethacrylates similar to those used to formulate hydraulic fluids with improved viscosity-temperature slope properties. The shear lability of these additives varied directly with their viscosity-temperature slope improver power. Slope improver power also was lost during sonic degradation, its extent depending upon the viscosity-temperature slope of the unsheared solutions. The relative shear lability of the polymer solutions was affected by the severity level employed in the sonic tests. Polymethacrylate solutions could be degraded further than polyisobutylene solutions when additives of equivalent oil thickening power were used; however, none were sheared to the viscosity level of the base oil.

Descriptors :   *DEGRADATION, *POLYMETHYL METHACRYLATE, *BUTENES, *HYDRAULIC FLUIDS, SHEAR PROPERTIES, SOLUTIONS(MIXTURES), POLYMERS, MOLECULAR WEIGHT, TEMPERATURE GRADIENTS, MINERAL OILS, DEPOLYMERIZATION, VISCOSITY, CONCENTRATION(CHEMISTRY), CHAIN REACTIONS, ULTRASONIC TESTS, SONIC BOOM, CAVITATION, LUBRICANT ADDITIVES.

Subject Categories : Polymer Chemistry
      Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE