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Degradable High Tg ...
Degradable High Tg Sugar Derived Polycarbonates from Isosorbide and Dihydroxyacetone
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- Hult, Daniel, 1986- (författare)
- KTH,Ytbehandlingsteknik
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- Garcia-Gallego, Sandra (författare)
- KTH,Ytbehandlingsteknik
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- Ingverud, Tobias (författare)
- KTH,Ytbehandlingsteknik
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- Andrén, Oliver (författare)
- KTH,Fiber- och polymerteknologi
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- Malkoch, Michael, 1974- (författare)
- KTH,Ytbehandlingsteknik
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(creator_code:org_t)
- Royal Society of Chemistry, 2018
- 2018
- Engelska.
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Ingår i: Polymer Chemistry. - : Royal Society of Chemistry. - 1759-9954 .- 1759-9962. ; 9:17, s. 2238-2246
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Polycarbonates from isosorbide and dihydroxyacetone (DHA) have been synthesised using organocatalytic step-growth polymerization of their corresponding diols and bis-carbonylimidazolides monomers. By choice of feed ratio and monomer activation, either isosorbide or ketal protected DHA, random and alternating poly(Iso-co-DHA) carbonates have been formed. Thermal properties by DSC and TGA were herein strongly correlated to monomer composition. Dilution studies using 1H-NMR of a model compound DHA-diethyl carbonate in acetonitrile and deuterated water highlighted the influence of α-substituents on the keto/hydrate equilibrium of DHA. Further kinetics studies of in the pH* range of 4.7 to 9.6 serve to show the hydrolytic pH-profile of DHA-carbonates. The Hydrolytic degradation of deprotected polymer pellets show an increased degradation with increasing DHA content. Pellets with a random or alternating configuration show different characteristics in terms of mass loss and molecular weight loss profile over time.
Ämnesord
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
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