Mechanism of the combined reaction of butyl isocyanate and methanol with aerosil

Кулик, Н. В.; Negievich, L. A.; Kurgan, N. P.; Belitskaya, G. F.; Kachan, A.A.

doi:10.1007/bf00525895

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Reactions between isocyanate and silanol groups form silylurethanes and were observed previously in the reactions of isocyanates with glasses and silicas. 24 –28 Probably, the polymer formed from MDI and POSS presented cross-linking, since the POSS used is trifunctional and the polymer was insoluble in DMF. The system containing MDI + BDO showed no visible phase separation at any stage of the synthesis in solution.…”

Section: Resultsmentioning

confidence: 99%

Polymerization kinetics of polyurethanes containing trisilanol isooctyl polyhedral oligomeric silsesquioxane

Fiório

Pistor

Zattera

et al. 2013

Journal of Elastomers & Plastics

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Two polyurethane model compounds obtained from 4,4 0 -diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BDO) or MDI and trisilanol isooctyl polyhedral oligomeric silsesquioxane (POSS) were synthesized and characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. Moreover, polymerization kinetics of the samples obtained from an isocyanate-terminated prepolymer and BDO containing 0, 0.23, 0.57, 1.14 and 2.28 wt% of POSS were studied from oscillatory rheometry and differential scanning calorimetry. A higher thermal stability was observed for MDI þ POSS when compared with MDI þ BDO compound. The addition of 1.14 and 2.28 wt% of POSS increased the activation energy of polymerization. The polymerization mechanisms observed were nucleation and growth (A 2 ) at the beginning of synthesis and diffusion controlled (D n ) at the last stage of conversion.

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Section: Resultsmentioning

confidence: 99%

Polymerization kinetics of polyurethanes containing trisilanol isooctyl polyhedral oligomeric silsesquioxane

Fiório

Pistor

Zattera

et al. 2013

Journal of Elastomers & Plastics

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Polysaccharide Microarrays: Application to the Identification of Heparan Sulphate Mimetics

Dheur

Dendane

Desmet

et al. 2011

Methods in Molecular Biology

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The interaction of polysaccharides with proteins modulates or triggers many biological effects. In particular, heparan sulphate proteoglycans (HSPGs) have multiple regulatory interactions with growth factors, enzymes, enzyme inhibitors, and some components of the extracellular matrix. The important role played by HSPGs has motivated the synthesis and selection of HSPG mimetics for modulating the biological activity of HS-binding proteins. We present hereinafter an efficient polysaccharide microarray method that allows the screening of HS-mimetic libraries towards HS-binding growth factors, a major class of polypeptides whose inhibition or potentiation is of high medical interest.

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Mechanism of the combined reaction of butyl isocyanate and methanol with aerosil

Cited by 2 publications

References 4 publications

Polymerization kinetics of polyurethanes containing trisilanol isooctyl polyhedral oligomeric silsesquioxane

Polymerization kinetics of polyurethanes containing trisilanol isooctyl polyhedral oligomeric silsesquioxane

Polysaccharide Microarrays: Application to the Identification of Heparan Sulphate Mimetics

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