Johari-Goldstein Relaxations during Physical Aging of Propylene Glycol Oligomers under High Pressure

2004 ◽  
Author(s):  
C. M. Roland
Keyword(s):  
High Pressure ◽  
Propylene Glycol ◽  
Physical Aging ◽  
Glycol Oligomers

THE EFFECT OF GLYCOLS ADDED TO DISINFECTANT-DETERGENT SOLUTIONS UPON AEROSOLIZED TEST MICROORGANISMS

1970 ◽  
Vol 33 (7) ◽  
pp. 274-276 ◽  
Author(s):  
Donald T. Braymen ◽  
Joseph R. Soncer
Keyword(s):  
High Pressure ◽  
Lactic Acid ◽  
Propylene Glycol ◽  
Substantial Reduction ◽  
Spray Application ◽  
Cleaning Methods ◽  
Detergent Solutions

Microorganisms that are aerosolized by high pressure cleaning methods are not appreciably affected by most disinfectant-detergent solutions when in this state. Since glycols are one of the few chemicals recognized as successful aerial disinfectants, it was suggested that the addition of certain glycols to these solutions would lower the concentration of suspended microorganisms. To test this possibility, triethylene and propylene glycol and lactic acid were added to phenolic disinfectant-detergent solutions. It was determined that there was no substantial reduction in the concentration of two aerosolized test microorganisms when the glycols were added. It is postulated that high relative humidities, 90% and above, are responsible for the failure of the glycols to reduce microorganism concentration during the high pressure spray application of the solution. Our findings indicate that the addition of glycols to disinfectant-detergent solutions for control of aerosolized microorganisms is not warranted.

Influence of Molecular Characteristics on Dielectric Relaxation of Propylene Glycol Oligomers

2001 ◽  
Vol 169 (1) ◽  
pp. 147-156
Author(s):  
Daniele Prevosto ◽  
Simone Capaccioli ◽  
Mauro Lucchesi ◽  
Pierangelo Rolla
Keyword(s):  
Dielectric Relaxation ◽  
Propylene Glycol ◽  
Molecular Characteristics ◽  
Glycol Oligomers
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