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- Unhydrolysable_glucose_polymers abstract "Glucans are polysaccharides of glucose monomers linked by glycosidic bonds. Accordingly, polymers built up of carbohydrate units bound by bonds other than glycosodic bonds are not considered polysaccharides. Only four different types glucose-based polysaccharides are possible to be built: 1,6- (starch), 1,4- (cellulose), 1,3- (laminarin) and 1,2-bonded glucans.Levoglucosan is 1,6-anhydro derivative of glucose. It is one of the key products in thermal conversion of polysaccharides. Polysaccharides are not volatile at combustion temperatures; propagation of fire takes place due to combustion of volatile products of degradation of polysaccharides, mainly levoglucosan.The first representatives of main chain unhydrolysable linear polymers made up of levoglucosan units were synthesized in 1985 by anionic polymerization of 2,3-epoxy derivatives of levoglucosan (1,6;2,3-dianhydro-4-O-alkyl-β-D-mannopyranoses).A wide range of unique monomers with different radical R can be synthesized. There were synthesized polymers with R= -CH3, -CH2CHCH2, and -CH2C6H5. Investigation of the polymerization kinetics of those derivatives, molecular weight and molecular-weight distribution showed that the polymerization has the features of a living polymerization system. The process takes place without termination and transfer of the polymer chain with a degree of polymerization equal to the mole ratio of the monomer to the initiator. Accordingly, the upper value molecular weight polymer determines only degree of purification system what determine the presence in the system uncontrollable amount of terminators of polymer chains.Poly(2-3)-D-glucose was synthesized proceeds by transformation of benzyl (R= -CH2C6H5) functionalized polymer.Polymerization of 3,4-epoxy levoglucosan (1,6;3,4-dianhydro-2-O-alkyl-β-D-galactopyranose) results in formation 3,4-bounded levoglucosan polymer.The presence of 1,6-anhydro structure in every unit of polymer chains allows to apply all spectra of well developed methods of carbohydrate chemistry with formation of highly intriguing biological application polymers.The polymers are the only known regular polyethers built up of carbohydrate units in main polymer chain.".
- Unhydrolysable_glucose_polymers thumbnail GLUCOSE_LG.png?width=300.
- Unhydrolysable_glucose_polymers wikiPageID "31557579".
- Unhydrolysable_glucose_polymers wikiPageLength "4756".
- Unhydrolysable_glucose_polymers wikiPageOutDegree "20".
- Unhydrolysable_glucose_polymers wikiPageRevisionID "671265645".
- Unhydrolysable_glucose_polymers wikiPageWikiLink Carbohydrate.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Carbohydrate_chemistry.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Category:Polysaccharides.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Cellulose.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Epoxy.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Glucan.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Glucose.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Glycosidic_bond.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Laminarin.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Levoglucosan.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Molecular_mass.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Monomer.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Polysaccharide.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Radical_initiator.
- Unhydrolysable_glucose_polymers wikiPageWikiLink Starch.
- Unhydrolysable_glucose_polymers wikiPageWikiLink File:2_3_POLYMER.png.
- Unhydrolysable_glucose_polymers wikiPageWikiLink File:3_4_polymer.png.
- Unhydrolysable_glucose_polymers wikiPageWikiLink File:Chemical_structure_of_levoglucosan.png.
- Unhydrolysable_glucose_polymers wikiPageWikiLink File:GLUCOSE_LG.png.
- Unhydrolysable_glucose_polymers wikiPageWikiLink File:Polyglucose.png.
- Unhydrolysable_glucose_polymers wikiPageWikiLinkText "Unhydrolysable glucose polymers".
- Unhydrolysable_glucose_polymers wikiPageWikiLinkText "unhydrolysable glucose polymers".
- Unhydrolysable_glucose_polymers wikiPageUsesTemplate Template:COI.
- Unhydrolysable_glucose_polymers wikiPageUsesTemplate Template:Expert.
- Unhydrolysable_glucose_polymers wikiPageUsesTemplate Template:Merge_to.
- Unhydrolysable_glucose_polymers wikiPageUsesTemplate Template:Multiple_issues.
- Unhydrolysable_glucose_polymers wikiPageUsesTemplate Template:Reflist.
- Unhydrolysable_glucose_polymers subject Category:Polysaccharides.
- Unhydrolysable_glucose_polymers hypernym Polysaccharides.
- Unhydrolysable_glucose_polymers type Polysaccharide.
- Unhydrolysable_glucose_polymers type Carbohydrate.
- Unhydrolysable_glucose_polymers type Polymer.
- Unhydrolysable_glucose_polymers type Polysaccharide.
- Unhydrolysable_glucose_polymers type Redirect.
- Unhydrolysable_glucose_polymers comment "Glucans are polysaccharides of glucose monomers linked by glycosidic bonds. Accordingly, polymers built up of carbohydrate units bound by bonds other than glycosodic bonds are not considered polysaccharides. Only four different types glucose-based polysaccharides are possible to be built: 1,6- (starch), 1,4- (cellulose), 1,3- (laminarin) and 1,2-bonded glucans.Levoglucosan is 1,6-anhydro derivative of glucose. It is one of the key products in thermal conversion of polysaccharides.".
- Unhydrolysable_glucose_polymers label "Unhydrolysable glucose polymers".
- Unhydrolysable_glucose_polymers sameAs Q7884606.
- Unhydrolysable_glucose_polymers sameAs m.0glpyfc.
- Unhydrolysable_glucose_polymers sameAs Q7884606.
- Unhydrolysable_glucose_polymers wasDerivedFrom Unhydrolysable_glucose_polymers?oldid=671265645.
- Unhydrolysable_glucose_polymers depiction GLUCOSE_LG.png.
- Unhydrolysable_glucose_polymers isPrimaryTopicOf Unhydrolysable_glucose_polymers.