Chromatography strategies for the composition determination of bio-based sorbitol azelaic acid ester

Chin, Sim Yee; Hong, Chi Shein; Kamaruzaman, M. R.; Chua, Gek Kee

doi:10.1016/j.polymertesting.2017.12.004

Cited by 5 publications

(5 citation statements)

References 28 publications

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“…Owing to the initiatives for sustainable development to reduce the environmental impact, the dependence on the petroleum‐based chemicals and the carbon footprint, the use of renewable resources as raw materials in polyurethane production is increasing . With increasing demand and awareness on green and bio‐based products, development of bio‐based TPU products are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

“…Bio‐based polyester polyols could be obtained from renewable resources either through biotechnological process (succinic and adipic acids), or chemical pathways (azelaic and sebacic acids) . TPUs made from bio‐based polyester polyols exhibited comparable performance as their analogue polyester polyols and in some properties they showed better …”

Section: Introductionmentioning

confidence: 99%

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Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Ismail

Ibrahim

Sendijarević³

et al. 2019

J of Applied Polymer Sci

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Polyester polyols from renewable resources have gained significant interest in the field of polyurethane chemistry. Two sets of segmented TPUs were prepared from crystalline and amorphous azelate polyols, 4,4′‐methylenebis(phenyl isocyanate), and 1,4‐butanediol as a chain extender at a mole ratio of 1:2:1, respectively. Bio‐1,3‐propanediol (1,3‐PDO) and 1,5‐pentanediol (PTDO) were used to prepare crystalline azelate polyols, while 1,2‐propanediol (1,2‐PDO) and 2,2′‐dimethyl‐1,3‐propanediol (NPG) were used to prepare amorphous azelate polyols. All TPUs displayed clear glass transition temperatures (T gs) in between −36 and − 24 °C, associated with azelate polyols soft segments, which are decreasing with increasing diols chain lengths in azelate polyols. TPUs based on crystalline azelate polyols exhibited higher mechanical properties and better heat resistance in comparison to their counter parts. Besides, TPU based on 1,3‐PDO azelate showed lower percentage of hysteresis indicating lower heat build‐up. This is essentially good for TPUs that are to be used in dynamic applications such as rollers and wheels. Hence, the study on structure–property correlation of the crystalline and amorphous azelate polyols and their effect on TPUs properties suggest that crystalline azelate polyols are suitable for dynamic application of TPU, and amorphous azelate polyols are suitable for coatings and adhesives applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47890.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Ismail

Ibrahim

Sendijarević³

et al. 2019

J of Applied Polymer Sci

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“…Then 0.4 ml of hexadimethylsilazane and 0.3 ml of trimethylchlorosilane were added. The solution was stirred for 30 sec and left for a certain time to ensure complete silylation (Quigley et al, 2014;Chin et al, 2018). It was then refluxed for 1 hour, filtered through a microfilter and injected into GC-FID.…”

Section: Methods B(silylation)mentioning

confidence: 99%

Gas chromatography analysis for the performance evaluation of the palm oil cross-metathesis using 1-octene

Thangavel

Yee

2021

Maejo Int. J. Energ. Environ. Comm. or MIJEEC

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Palm oil is one of the important raw materials in the oleochemical industry for downstream expansion and sustainability. The built-in functionality and availability of oil worldwide make palm oil more attractive. It can be further modified using the cross-metathesis process for the production of bio-based polyol. In this study the cross metathesised palm oil was pre-treated with different types of pre-treatment methods namely transesterification, silylation, methylation and dilution to find the best pre-treatment method. Moreover, the pre-treated samples were analysed using two different Gas chromatography columns installed to the Gas chromatography flame ionisation detector (GC-FID). The best pre-treatment method was then used to prepare the samples taken from the palm oil octenolysis at different molar ratio of palm oil to 1-octene. According to the findings of this research, dilution method outperformed other pre-treatment methods.

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“…It is in organic synthesis that silyl ethers have usually been applied as protecting groups for alcohols. [61][62][63][64][65] The great application of the silicon-oxygen linkage in the synthesis of complex molecules clarifies its significance for the temporarily protecting a hydroxy group. [66] The steric and electronic environment adjustments at the silicon atom are related to dozens of common silicon-based protective groups which are orthogonal in both the protection and deprotection steps.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in catalytic silylation of hydroxyl‐bearing compounds: A green technique for protection of alcohols using Si–O bond formations

Ashraf

Liu

et al. 2020

Applied Organom Chemis

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The development of catalytic silylation of alcohols under ambient reaction conditions plays an important role in organic synthesis. New silyl groups and methods for their introduction and removal are constantly being developed and offer chemists a wider range of options. In recent years, silyl protecting groups have been given expanded roles beyond their traditional use of temporarily rendering inactive alcohols. As silyl ether can be further converted to the parent alcohols in acidic conditions, silylation of alcohols can be regarded as an alternative method for hydroxyl protection under ambient reaction conditions. Merging the silyl protection/deprotection of alcohols with such modern methodologies, as green chemistry and nanoscience, has added additional value to these temporary components of synthetic intermediates. This review describes the historical background of the trimethylsilyl ethers preparation from alcohols using catalytic complexes and also the transformation of trimethylsilyl ethers into alcohol-containing compounds via deprecation techniques.

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Chromatography strategies for the composition determination of bio-based sorbitol azelaic acid ester

Cited by 5 publications

References 28 publications

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Gas chromatography analysis for the performance evaluation of the palm oil cross-metathesis using 1-octene

Recent advances in catalytic silylation of hydroxyl‐bearing compounds: A green technique for protection of alcohols using Si–O bond formations

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