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Iskalni niz: "avtor" (Ema Žagar) .

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1.
Insight into chemical recycling of flexible polyurethane foams by acidolysis
Maja Grdadolnik, Ana Drinčić, Ana Oreški, Özgün Can Önder, Petra Utroša, David Pahovnik, Ema Žagar, 2022, izvirni znanstveni članek

Objavljeno v DiRROS: 19.01.2022; Ogledov: 318; Prenosov: 214
.pdf Celotno besedilo (4,35 MB)
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Chemical recycling of aliphatic polyamides by microwave-assisted hydrolysis for efficient monomer recovery
Urška Češarek, David Pahovnik, Ema Žagar, 2020, izvirni znanstveni članek

Objavljeno v DiRROS: 26.11.2020; Ogledov: 1048; Prenosov: 575
.pdf Celotno besedilo (1,88 MB)
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Post-polymerization modification of poly(L-glutamic acid) with d-(+)-glucosamine
Peter Perdih, Sašo Čebašek, Alenka Možir, Ema Žagar, 2014, izvirni znanstveni članek

Povzetek: Carboxyl functional groups of poly(L-glutamic acid) (PGlu) were modified with a D-(+)-glucosamine (GlcN) by amidation using 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4- methylmorpholinium chloride (DMTMM) as a coupling reagent. The coupling reaction was performed in aqueous medium without protection of hydroxyl functional groups of D-(+)-glucosamine. Poly(L-glutamic acid) and GlcN functionalized polyglutamates (P(Glu-GlcN)) were thoroughly characterized by 1D and 2D NMR spectroscopy and SEC-MALS to gain detailed information on their structure, composition and molar mass characteristics. The results reveal successful functionalization with GlcN through the amide bond and also to a minor extent through ester bond formation in position 1 of GlcN. In addition, a ratio between the α- and β-form of glucosamine substituent coupled to polyglutamate repeating units as well as the content of residual dimethoxy triazinyl active ester moiety in the samples were evaluated.
Ključne besede: poly(L-glutamic acid), glucosamine, glycopolypeptide
Objavljeno v DiRROS: 16.12.2014; Ogledov: 3866; Prenosov: 718
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