Some studies on Dipropylene glycol used in various fields, as a component, as a component associated with others, as a marker, as a copolymer (1).
Safety
The effect of solvent polarity on wormlike micelles using dipropylene glycol (2).
Dipropylene glycol is found in antifreeze, air fresheners, cosmetics, solvents and plastics. In this study, the effects of dipropylene glycol on rats and male and female mice to identify potential or cancer-related risks to humans (3).
Contrast to environmental pollution
Waste polyethylene terephthalate (PET) has been a core member in plastic polluters due to the great amount consumption in food packaging, soft-drink bottles, fibers and films. It is essential to recycle waste PET and alcoholysis is a significant way to accomplish chemical recycling. In this work, three kinds of dihydric alcohols, including neopentyl glycol (NPG), dipropylene glycol (DPG) and poly(propylene glycol) (PPG), were employed to decompose waste PET with different temperatures, catalysts, and PET. A series of alcoholysis products with different appearance were obtained. The bulk structure and thermal properties of alcoholysis products were investigated by FTIR, 1H NMR, MALDI-TOF, DSC and TG experiments. It is found that poly(propylene glycol) may react with waste PET to generate copolymer instead of oligomer products, dimers or trimers, etc. This product possesses excellent shelf stability and present transparent appearance, which may hold a great potential application in chemical industry. Moreover, the alcoholysis activity of DPG is the lowest comparing with NPG and EG in degradation of waste PET (4).
