Results 171 to 180 of about 2,759 (198)

Thermal degradation of trimethylolpropane/adipic acid hyperbranched poly(ester)s

Journal of Thermal Analysis and Calorimetry, 2014
Hyperbranched poly(ester)s offer attractive features for applications in a number of areas, particularly as platforms for the support of controlled release actives in the agricultural and biomedical fields. Such materials have been generated from trimethylolpropane and adipic acid, and fully characterized using chromatographic, spectroscopic, and ...
Tracy Zhang, Bob A. Howell, Patrick B. Smith   +2 more
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Esters of the cyclic butyral of trimethylolpropane -components of synthetic oil

Chemistry and Technology of Fuels and Oils, 1971
1. Esters of the cyclic butyral of trimethylolpropane and mixtures of C7-C9 or C10-C16 acids were synthesized. 2. According to their physicochemical properties, the esters obtained can be used as components of synthetic oils. 3.
S. Z. Kaplan, L. V. Novoselova, L. A. Potolovskii   +2 more
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Modeling of reaction kinetics for transesterification of palm-based methyl esters with trimethylolpropane

Bioresource Technology, 2010
A mathematical model describing chemical kinetics of transesterification of palm-based methyl esters with trimethylolpropane has been developed. The model was developed by utilizing nonlinear regression method, which is an efficient and powerful way to determine rate constants for both forward and reverse reactions.
Ruzaimah Nik Mohamad, Kamil, Suzana, Yusup   +1 more
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The effect of palm oil trimethylolpropane ester on extreme pressure lubrication

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2013
This paper presents the experimental results for the extreme pressure characteristics of a palm oil-based trimethylolpropane (TMP) ester blended with paraffin oil obtained using a four-ball machine. The load and speed of the sample were set between 20–120 kg and 1770 rpm, respectively.
Zulkifli, Nurin Wahidah Mohd, Kalam, Md. Abul, Masjuki, Haji Hassan, Al Mahmud, K.A.H., Yunus, R.   +4 more
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Immobilized lipase-catalyzed transesterification for synthesis of biolubricant from palm oil methyl ester and trimethylolpropane

Bioprocess and Biosystems Engineering, 2021
The present study reports the effects of three commercial immobilized lipases namely Novozyme 435 from Candida antarctica lipase B (CALB), Lipozyme TL IM from Thermomyces lanuginosus and Lipozyme RM IM from Rhizomucor miehei on the production of trimethylolpropane (TMP) ester from high oleic palm methyl ester (HO-PME) and TMP.
Nur Sulihatimarsyila Abd, Wafti, Robiah, Yunus, Harrison Lik Nang, Lau, Thomas Choong Shean, Yaw, Suraini Abdul, Aziz   +4 more
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Production of trimethylolpropane esters of rapeseed oil fatty acids by immobilized lipase

Biotechnology Techniques, 1997
The polyol, trimethylolpropane (2-ethyl-2-hydroxymethyl-1,3-propanediol), and a mixture of rapeseed oil fatty acid methyl esters were transesterified by immobilized lipases without additional organic solvent. The conversion to the polyol tri-ester with immobilized Rhizomucor mieheilipase Lipozyme IM 20 was about 75% after 24 h at 58°C, 5.3 kPa, with no
Y.-Y. Linko, T. Tervakangas, M. Lämsä, P. Linko   +3 more
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Poly(ester amine) Synthesized from Trimethylolpropane Triacrylate and Spermine as an Efficient siRNA Carrier

Journal of Nanoscience and Nanotechnology, 2013
Small interfering RNA (siRNA) is a promising candidate for gene therapy due to the strong and specific gene silencing effects. However, to effectively silence any protein, lack of an efficient delivery system is major obstacle for siRNA therapeutics. In the present study, we report on the development of a novel poly(ester amine) (PEA) as an efficient ...
You-Kyoung, Kim, Chong-Su, Cho, Myung-Haing, Cho, Hu-Lin, Jiang   +3 more
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Synthesis of Palm Oil Based Trimethylolpropane Esters with Improved Pour Points

Industrial & Engineering Chemistry Research, 2005
Palm oil based trimethylolpropane (TMP) esters are potential biodegradable base stocks for environmentally friendly lubricants. To improve the low-temperature properties of palm oil based TMP esters, which are well below the requirements set by the lubricants' manufacturers, the high oleic content palm oil based TMP ester with a pour point between −10 ...
Robiah Yunus, Ahmadun Fakhru'l-Razi, Tian Lye Ooi, Rozita Omar, Azni Idris   +4 more
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Synthesis of trimethylolpropane esters with immobilized lipase from Candida sp. 99–125

Journal of Molecular Catalysis B: Enzymatic, 2012
Abstract The lubricants of the future have to be more environmentally adapted, have a higher level of performance. Synthesis esters (SEs) which can be used as raw materials for biodegradable lubricant base oils are increasing in popularity due to superior technical properties.
Yifeng Tao, Biqiang Chen, Luo Liu, Tianwei Tan   +3 more
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On the Mechanism of Alcoholysis between Fatty Acid Methyl Esters and Trimethylolpropane

Med Discoveries, 2023
This paper reports on a previously undescribed mechanism of the alcoholysis of fatty acid methyl esters with a polyol, in particular,
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