Adipates of poly(propylene oxide-co-tetrahydrofuran) as a novel base stock for varied lube applications

Three biodegradable polyalkylene glycols containing 1:1, 1:2 and 1:4 mol% fraction of propylene oxide and tetrahydrofuran were synthesized and denoted as 1,1-PTH, 1,2-PTH and 1,4-PTH. The synthesized polyalkylene glycols were subsequently treated with adipic acid to get desired esters. At first, thr...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2019-10, Vol.76 (10), p.5415-5431
Main Authors: Kukrety, Aruna, Sarkar, Tarun K., Faujdar, Ekta, Singh, Raj K., Jain, Suman L., Ray, Siddharth S.
Format: Article
Language:English
Subjects:
Adipic acid
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Copolymers
Esterification
Esters
Fourier transforms
Glycols
Lubricants
Lubricants & lubrication
Mechanical properties
Metalworking fluids
Mineral oils
Molecular weight
Nitrogen
Nylon
Oils & fats
Organic Chemistry
Original Paper
Oxidation
Physical Chemistry
Polymer Sciences
Propylene oxide
Soft and Granular Matter
Solvents
Temperature
Tetrahydrofuran
Thin films
Toluene
Tribology
Viscosity
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Summary:Three biodegradable polyalkylene glycols containing 1:1, 1:2 and 1:4 mol% fraction of propylene oxide and tetrahydrofuran were synthesized and denoted as 1,1-PTH, 1,2-PTH and 1,4-PTH. The synthesized polyalkylene glycols were subsequently treated with adipic acid to get desired esters. At first, three different copolymers of propylene oxide and tetrahydrofuran, namely 1,1-PTH, 1,2-PTH and 1,4-PTH (polyglycol containing 1:1, 1:2 and 1:4 mol% fraction of PO and THF), with molecular weights 564.0, 838.6 and 1070.7 were synthesized. Then, the esterification of the synthesized polyglycols was carried out using p -toluenesulfonic acid as the catalyst and toluene as a solvent. The obtained esters 1,1-PTHAD, 1,2-PTHAD and 1,4-PTHAD were observed to have the molecular weights 1292.1, 1705.0 and 2201.1, respectively. After molecular and physicochemical characterizations, the tribological properties were also evaluated. A comparison of the properties of these esters was made, and it was found that 1,1-PTHAD, 1,2-PTHAD and 1,4-PTHAD are favorably used as metalworking fluid, industrial gear oil and compressor lubricant base oil, respectively. Graphical abstract
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-018-2661-y