Abstract
A series of commercial polyether polyols with well-defined molecular weights (MW) was used along with propylene glycol and dipropylene glycol as gel permeation chromatography (GPC) calibration standards to determine the MW and oligomeric composition of the synthesized low MW fatty acid methyl ester (FAME) polyols, having an MW of lower than 600 Da. This GPC analysis was compared to the one calibrated against the commercially-available polystyrene (PS) standards and to the number-average molecular weight (M n) obtained via vapor pressure osmometry (VPO) technique. The MW of FAME polyols obtained with GPC calibrated against polyether polyols were closer to the M n values obtained via VPO than the MW obtained via GPC calibrated against PS standards. Using the reliable GPC calibration, the MW distribution and the hydroxyl functionality of FAME polyols were determined with greater confidence.
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Acknowledgements
The authors would like to express their gratitude to the Director-General of the Malaysian Palm Oil Board for the approval to publish this manuscript. The authors would like to credit Ms. Sharipah Samsiah Rahman, Mr. Makmor Abd. Wahab, Ms. Nurul ‘Ain Hanzah, Ms. Norhayati Mohd Noor, Ms. Norhidayah Ahmad Yusoff, Mr. Muhammad Ihsan Ismail and Mr. Mohamed Ahir Musa for their technical assistance in producing this article.
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Mohd Noor, M.A., Tuan Ismail, T.N.M., Sendijarevic, V. et al. Molecular Weight Distribution of Low Molecular Weight Polyols Derived from Fatty Acid Methyl Esters. J Am Oil Chem Soc 94, 387–395 (2017). https://doi.org/10.1007/s11746-017-2950-x
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DOI: https://doi.org/10.1007/s11746-017-2950-x