STP1183

    Effect of Polyethylene Glycol on the Adsorption of Polymeric Surface Active Agent and the Stability of Concentrated Suspensions

    Published: Jan 1993


      Format Pages Price  
    PDF Version (200K) 14 $25   ADD TO CART
    Complete Source PDF (6.7M) 14 $67   ADD TO CART


    Abstract

    The adsorption and the configuration of the polymeric surfactant at the solid / liquid interface are vital to the steric and electrostatic stability of suspension concentrates. The process of adsorption and the adsorption layer thickness to obtain the most stable system is a complex task and depends on many factors.

    This paper discusses the stages involved in the optimization of a suspension concentrate and the results of a study of the effect of polyethylene glycol on adsorption of block polymer where the molecular weights of two components are varied. A model system was chosen to study various physico chemical properties such as adsorption, wetting, contact angle, dynamic surface tension, dilution performance, suspensibility, freeze-thaw stability, particle size, and rheology. Our results showed interesting correlations between these properties and the structure of the polymeric surfactant.

    Keywords:

    Polymeric surfactant, polyethylene glycols, configuration at interface, suspension concentrates, flowables, adsorption, dynamic surface tension


    Author Information:

    Memula, S
    Formulation Chemist, Witco Corporation, Houston, TX

    Jimenez, A
    Application Manager, Witco Corporation, Houston, TX

    Berger, CH
    Research Chemist, Witco Corporation, Houston, TX


    Paper ID: STP25127S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP25127S


    CrossRef ASTM International is a member of CrossRef.