1.How to tell if a polymer material is degradable?
Whether a polymer material is degradable can be judged by its chemical formula, and in general, polymer materials with the following groups are easy to degrade.
Ester groups, ether bonds, aldehyde groups, peptide bonds (or amides).
2.How can you tell if a chemical formula contains chiral carbon?
The methods for judging chiral carbon atoms are:
Chiral carbon atoms must be saturated carbon atoms;
The four groups to which the chiral carbon atom is attached should be different.
Chiral carbon atom refers to the carbon atom with four different groups attached to it, which is vividly called chiral carbon atom, as shown in the figure.
The chiral carbon in the question is shown in the figure.
How to judge a polycondensation reaction.
1.Decrease in the number of reactant molecules: Polycondensation is usually the combination of two or more molecules to form a larger molecule, so the number of reactants in the reaction decreases.
Few. In the figure, n isosorbide and n dimethyl carbonate are combined to form a polyisosorbate and n monomers.
2.In a polycondensation reaction, larger molecules are usually formed as products.
3.Polycondensation reactions are often accompanied by the formation of water or other small molecules such as alcohols, phenols, etc., which are lost from the reactants.
By the fact that no alcohols are found in the product macromolecule, we believe that methanol has been lost from the reactants.
4.In a polycondensation reaction, two or more reactant molecules are bound together by covalent bonds or other chemical bonds to form larger molecules.
5.Esterification reaction, amide formation reaction, acid chloride and alcohol reaction are all common polycondensation reactions.
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