The weight average molecular weight of the polymer is the average of the molecular weights of all the polymer chains in the sample, taking into account the weight of each chain.
The average molecular weight of a polymer is important in determining its properties and performance. Higher molecular weight polymers tend to have better mechanical properties, such as strength and toughness, as well as improved thermal stability. On the other hand, lower molecular weight polymers may have better processability and flexibility. Overall, the average molecular weight of a polymer plays a crucial role in its overall performance and application suitability.
Simply looking at the expressions that derive weight average and number average one can see that the weight average is a second order expression where number average is a first order. To put it more simply: weight averaged molecular weight emphasizes heavy molecules more than light ones; number averaged molecular weight says a molecule is a molecule and counts them both equally.
The average molecular weight of a polymer is important in determining its properties and performance because it affects characteristics such as strength, flexibility, and durability. Higher molecular weight polymers tend to have better mechanical properties and are more resistant to degradation, while lower molecular weight polymers may be more flexible but less strong. Overall, the molecular weight of a polymer plays a key role in determining how it will behave in various applications.
The weight average molecular weight of the compound is the average of the molecular weights of all the molecules in the sample, weighted by their relative abundance.
Number-average degree of polymerization = (Number-average molecular weight of polymer) / (Molecular weight of repeating unit) For polypropylene, the molecular weight of the repeating unit is 42 g/mol. Thus, degree of polymerization = 1000000 g/mol / 42 g/mol = 23809.52.
The average molecular weight of a polymer is important in determining its properties and performance. Higher molecular weight polymers tend to have better mechanical properties, such as strength and toughness, as well as improved thermal stability. On the other hand, lower molecular weight polymers may have better processability and flexibility. Overall, the average molecular weight of a polymer plays a crucial role in its overall performance and application suitability.
Simply looking at the expressions that derive weight average and number average one can see that the weight average is a second order expression where number average is a first order. To put it more simply: weight averaged molecular weight emphasizes heavy molecules more than light ones; number averaged molecular weight says a molecule is a molecule and counts them both equally.
The average molecular weight of a polymer is important in determining its properties and performance because it affects characteristics such as strength, flexibility, and durability. Higher molecular weight polymers tend to have better mechanical properties and are more resistant to degradation, while lower molecular weight polymers may be more flexible but less strong. Overall, the molecular weight of a polymer plays a key role in determining how it will behave in various applications.
The weight average molecular weight of the compound is the average of the molecular weights of all the molecules in the sample, weighted by their relative abundance.
Number-average degree of polymerization = (Number-average molecular weight of polymer) / (Molecular weight of repeating unit) For polypropylene, the molecular weight of the repeating unit is 42 g/mol. Thus, degree of polymerization = 1000000 g/mol / 42 g/mol = 23809.52.
The average molecular weight of the compound is the sum of the atomic weights of all the atoms in the molecule, divided by the number of atoms.
In organic chemistry, the polydispersity index (PDI), is a measure of the distribution of molecular mass in a given polymer sample. The PDI calculated is the weight average molecular weight divided by the number average molecular weight. It indicates the distribution of individual molecular masses in a batch of polymers. The PDI has a value always greater than 1, but as the polymer chains approach uniform chain length, the PDI approaches unity (1). For some natural polymers PDI is almost taken as unity. The PDI from polymerization is often denoted as: \ PDI = M_w/M_n
This is a catalyst.
The tendency of a polymer to crystallize decreases with increasing molecular weight because as the chains become longer it is more difficult for all regions along adjacent chains to align so as to produce the ordered atomic array.
62.5 * length of chain ( num of moluclar of vcm )!! think that
Molecular weight of a polymer depends rather on it's degree of polymerization (chain length) than on it's composition. Typical polymer molecular weights are in the range of 1000 to 1000 000 and beyond.
The average molecular weight of a nucleotide is around 330 daltons.