Journal ArticleDOI
Lipase catalyzed synthesis of silicone polyesters.
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TLDR
Immobilized Candida antarctica lipase B (CALB) was successfully employed as a catalyst to synthesize silicone aromatic polyesters by the transesterification of dimethyl terephthalate with alpha,omega-bis(hydroxyalkyl)-terminated poly(dimethylsiloxane) in toluene under mild reaction conditions.About:
This article is published in Chemical Communications.The article was published on 2009-11-02. It has received 28 citations till now. The article focuses on the topics: Transesterification & Candida antarctica.read more
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Journal ArticleDOI
Thermal stability of Candida antarctica lipase B immobilized on macroporous acrylic resin particles in organic media
TL;DR: The thermal stability and swelling of the Novozyme-435 in organic solvents (toluene and diphenyl ether) where the enzyme activity was quantified using an octyl laurate assay is presented.
Journal ArticleDOI
Unexpected enzyme-catalyzed regioselective acylation of flavonoid aglycones and rapid product screening.
Eleni Kyriakou,Alexandra Primikyri,Pantelis Charisiadis,Maria H. Katsoura,Ioannis P. Gerothanassis,Haralambos Stamatis,Andreas G. Tzakos +6 more
TL;DR: Unprecedented regioselective acylation of flavonoid aglycones was achieved using Candida antarctica lipase B (CALB) using the high resolution phenol-type OH (1)H NMR spectral region recorded after the addition of picric acid.
Journal ArticleDOI
Lipase-Catalyzed Synthesis and Properties of Silicone Aromatic Polyesters and Silicone Aromatic Polyamides
TL;DR: In this article, a transesterification reaction with dimethyl terephthalate (DMT) in toluene (1:2 w/v ratio of monomers to solvent) at a temperature in the range of 80−90 °C under vacuum.
Journal ArticleDOI
Enzymatic synthesis of poly(ε-caprolactone): thermal properties, recovery, and reuse of lipase B from Candida antarctica immobilized on macroporous acrylic resin particles
TL;DR: The enzyme recovery and reuse for the synthesis of poly(ε-caprolactone) in toluene at 70 °C for 4 h per cycle for up to 10 reaction cycles consistently resulted in polymers with a weight-average molecular weight, Mw, of ~50,000 g mol−1 and a polydispersity index of ~1.4.
References
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Journal ArticleDOI
Polymer Synthesis by In Vitro Enzyme Catalysis
TL;DR: Microbial polymers are synthesized from renewable low-cost feedstocks, and the polymerizations operate under mild process conditions with minimal environmental impact, providing products that, when disposed, can degrade to nontoxic products.
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The thermal degradation of polysiloxanes—I. Poly(dimethylsiloxane)
N. Grassie,I.G. Macfarlane +1 more
TL;DR: In this article, the evolution of volatile materials from pure poly(dimethylsiloxane) heated under temperature programmed conditions (10° min−1 under vacuum) is detectable at 343° and reaches a maximum at 443°.
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Enzymatic polymerization: A new method of polymer synthesis
TL;DR: This article describes the recent progress of enzymatic polymerization technique, developed mainly during this decade, which utilizes enzymes of hydrolases and oxidoreductases as catalysts.
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Studies of cyclic and linear poly(dimethyl-siloxanes): 21. High temperature thermal behaviour
Stephen J. Clarson,J.A. Semlyen +1 more
TL;DR: In this paper, the high temperature thermal behavior of cyclic and linear poly(dimethylsiloxanes) (PDMS) was investigated using differential scanning calorimetry and thermogravimetry.
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Enzymatic Synthesis and Solid-State Properties of Aliphatic Polyesteramides with Polydimethylsiloxane Blocks
Bhaskar Sharma,Abul Azim,Himanshu Azim,Richard A. Gross,Elisa Zini,Maria Letizia Focarete,Mariastella Scandola +6 more
TL;DR: The synthesis of silicone polyesteramides was successfully performed in bulk at 70 °C via a biocatalytic route using Immobilized Candida antartica Lipase B as catalyst.