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 m ...

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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).

References_________________________________________

(1) Chronic effects of non-weathered and weathered crude oil and dispersant associated with the Deepwater Horizon incident on development of larvae of the eastern oyster, Crassostrea virginica.
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Environ Toxicol Chem. 2016 Aug

Thermoresponsive latexes for fragrance encapsulation and release.
Popadyuk N, Popadyuk A, Kohut A, Voronov A.
Int J Cosmet Sci. 2016 Apr

Preparation, characterization and buccal permeation of naratriptan.
Sattar M, Hadgraft J, Lane ME.
Int J Pharm. 2015 Sep

Stability Conditions and Mechanism of Cream Soaps: Effect of Polyols.
Sagitani H, Komoriya M.
J Oleo Sci. 2015

(2) The effect of solvent polarity on wormlike micelles using dipropylene glycol (DPG) as a cosolvent in an anionic/zwitterionic mixed surfactant system.

Jiang H, Beaucage G, Vogtt K, Weaver M.

J Colloid Interface Sci. 2018 Jan 1;509:25-31. doi: 10.1016/j.jcis.2017.08.090. Epub 2017 Aug 31.

(3) NTP toxicology and carcinogensis studies of dipropylene glycol (CAS No. 25265-71-8) in F344/N rats and B6C3F1 mice (drinking water studies).

Natl Toxicol Program Tech Rep Ser. 2004 Jun;(511):6-260.

(4) Structure and thermal properties of various alcoholysis products from waste poly(ethylene terephthalate).

Zhou X, Wang C, Fang C, Yu R, Li Y, Lei W.

Waste Manag. 2019 Feb 15;85:164-174. doi: 10.1016/j.wasman.2018.12.032. Epub 2018 Dec 31.

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