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Degradation of polymers during aerosol formation from antimisting polymer solutions
Author(s) -
Ilano Arron L.,
Williams Michael C.,
Grens Edward A.
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070320220
Subject(s) - polymer , degradation (telecommunications) , polymer degradation , solvent , aerosol , materials science , jet (fluid) , chemical engineering , chemistry , composite material , organic chemistry , thermodynamics , telecommunications , physics , computer science , engineering
Degradation of polyisobutylenes as a consequence of spraying jet‐fuel solutions of these polymers was studied as a function of polymer molecular weight and concentration and the spray conditions. Assessment of the degradation was made by measuring the maximum ductless siphon height h * for sprayed samples and comparing this with prespray values. Two polymers, L‐160 from Exxon and B‐288 from BASF ( M v = 4.1× 10 6 and 11.9 × 10 6 ), were studied to concentrations of 3000 and 2000 ppm, respectively. Degradation was found to be extremely sensitive to the air speed used in wind‐shear spraying, above a critical value of approximately 30–40 m/s. At the highest air speed employed, 135 m/s, degradation was so severe that h * values were reduced nearly to Newtonian (solvent) values, for all concentrations of both polymer additives. The implications of these results are important for designing effective antimisting fluids.