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Anhydroglucose Unit
The anhydroglucose unit (AGU) refers to a single sugar molecule in a polymer. Each AGU is reduced to its functional groups, 3 hydroxyl groups per AGU. Carbohydrate AGU: Cellulose AGU: {, class="wikitable" !Polymer !AGU{{Cite book, title=Cellulose Fibers: Bio- and Nano-Polymer Composites, last=Varshney, first=V. K., last2=Naithani, first2=Sanjay, date=2011, publisher=Springer Berlin Heidelberg, isbn=9783642173691, editor-last=Kalia, editor-first=Susheel, pages=43–60, language=en, doi=10.1007/978-3-642-17370-7_2, editor-last2=Kaith, editor-first2=B. S., editor-last3=Kaur, editor-first3=Inderjeet !mmol -OH/g , - , cotton fibers , 8,000–14,000 , , - , cotton linters , 1,000–6,500 , , - , baggase , 700–900 , , - , wood fibers , 8,000–9,000 , See also * Degree of polymerization The degree of polymerization, or DP, is the number of monomeric units in a macromolecule or polymer or oligomer molecule. For a homopolymer, there is only one type of monomeric unit and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree Of Polymerization
The degree of polymerization, or DP, is the number of monomeric units in a macromolecule or polymer or oligomer molecule. For a homopolymer, there is only one type of monomeric unit and the ''number-average'' degree of polymerization is given by DP_n\equiv X_n=\frac, where Mn is the number-average molecular weight and M0 is the molecular weight of the monomer unit. For most industrial purposes, degrees of polymerization in the thousands or tens of thousands are desired. This number does not reflect the variation in molecule size of the polymer that typically occurs, it only represents the mean number of monomeric units. Some authors, however, define DP as the number of repeat units, where for copolymers the repeat unit may not be identical to the monomeric unit.Fried J.R. "Polymer Science and Technology" (Pearson Prentice-Hall, 2nd edn 2003), p.27 For example, in nylon-6,6, the repeat unit contains the two monomeric units —NH(CH2)6NH— and —OC(CH2)4CO—, so that a chain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
