How to Calculate Degree of Polymerization

Divide the molecular weight of the polymer by the molecular weight of the monomer unit to calculate the degree of polymerization. If the molecular mass of tetrafluoroethylene is 120,000, its degree of polymerization is 120,000 / 100 = 1,200.

1. How do you find the degree of polymerization from NMR?
2. What is degree of polymerization in chemistry?
3. How is degree of polymerization controlled?
4. What is the degree of polymerization of polystyrene?
5. How do you convert NMR to percentage?
6. What is end group analysis?
7. What are polymerization reaction?
8. How do I calculate molecular weight?
9. How do you calculate the weight of a degree of polymerization?
10. How do you control polymerization?
11. What is degree of polymerization of cellulose?
12. How do you control the molecular weight of a polymer?

How do you find the degree of polymerization from NMR?

The Mn,NMR of the PEG-PGMA51 could be calculated using the following formulation: 5000+51*142=12242. Calculation of drug content from the 1H NMR results. ×100%=32.47% where n is the degree of polymerization of the relevant polymer, and MDOX, MGMA, MCBA, and MPEG is the molar mass of DOX, GMA, CBA and PEG, respectively.

What is degree of polymerization in chemistry?

The degree of polymerization, or DP, is the number of monomeric units in a macromolecule or polymer or oligomer molecule. ... 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.

How is degree of polymerization controlled?

By using postassembly ligand photo-cross-linking, we established a method to arrest NR polymer growth after a particular self-assembly time, and in this manner, using kinetics of step-growth polymerization, we achieved control over the average degree of polymerization of plasmonic polymers.

What is the degree of polymerization of polystyrene?

Therefore, the average degree of polymerization by weight of a sample of PS with a molecular weight Mw = 5.4 106 g / mol, is: xw = 5.4 x 106 / 104 = 5.2 x 104.

How do you convert NMR to percentage?

(Conversion=100- (mol residual starting material/mol starting material) x 100). You can then apply the similar procedure for your product(s). The integral ratio of your 1-H product(s) equivalent and the 1H equivalent of internal standard will give you the molar ratio of your product(s) to the internal standard.

What is end group analysis?

In polymer chemistry, end groups are functionalities or constitutional units that are at the extremity of a macromolecule or oligomer (IUPAC). ... Not only are these groups important for the analysis of the polymer, but they are also useful for grafting to and from a polymer chain to create a new copolymer.

What are polymerization reaction?

Polymerization, in polymer chemistry, is the process of reacting monomer molecules together in a chemical reaction to form three-dimensional networks or polymer chains. There are many forms of polymerization and different systems exist to categorize them.

How do I calculate molecular weight?

Sample Molecular Weight Calculation

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

How do you calculate the weight of a degree of polymerization?

Divide the molecular weight of the polymer by the molecular weight of the monomer unit to calculate the degree of polymerization. If the molecular mass of tetrafluoroethylene is 120,000, its degree of polymerization is 120,000 / 100 = 1,200.

How do you control polymerization?

Controlled Polymerization Methods. In NMP systems, stable free radicals, such as nitroxides, are used as reversible terminating agents to control the polymerization process. Dormant chains are generated by reversible deactivation of the growing chains through covalent bond formation.

What is degree of polymerization of cellulose?

Degree of polymerization (DP) is one of the most important structural properties of cellulose. ... However, current measurement technique has a major limitation that non-cellulosic components such as lignin and hemicellulose can inhibit the accurate measurement of cellulose DP.

How do you control the molecular weight of a polymer?

To properly control the polymer molecular weight, the stoichiometric imbalance of the bifunctional monomer or the monofunctional monomer must be precisely adjusted. If the nonstoichiometric imbalance is too large, the polymer molecular weight will be too low.