04-11-2018, 02:07 PM

Hi!I don't understand the definition of the degree of polymerization that my textbook says....

The definition I have is:

degree of polymerization, Xn= number (avarage) of repeat units of the polymeric chains [/size]

Xn = number of monomer molecules/ number of polymer molecules = c0/ (c0-c0p = 1/(1-p)

where:

c0= n° of functional group at t=0

c= n° of functional group at a certain time "t"

c0-c=pc0 = n° of functional group extinguished at the "t" time.

p= extent of reaction

Now my doubt is about these definition and the definition of degree of polyerization Xn

How can is possible that the expression: number of monomer molecules/ number of polymer molecules = c0/ (c0-c0p = 1/(1-p)

can give X_n ? IF X_n is the avarage number of repeat unit of a polymeric chain in my polymeric material how can that expression give that avarage number?!

Is impossible written like this...

Some help??

Thanks

The definition I have is:

degree of polymerization, Xn= number (avarage) of repeat units of the polymeric chains [/size]

Xn = number of monomer molecules/ number of polymer molecules = c0/ (c0-c0p = 1/(1-p)

where:

c0= n° of functional group at t=0

c= n° of functional group at a certain time "t"

c0-c=pc0 = n° of functional group extinguished at the "t" time.

p= extent of reaction

Now my doubt is about these definition and the definition of degree of polyerization Xn

How can is possible that the expression: number of monomer molecules/ number of polymer molecules = c0/ (c0-c0p = 1/(1-p)

can give X_n ? IF X_n is the avarage number of repeat unit of a polymeric chain in my polymeric material how can that expression give that avarage number?!

Is impossible written like this...

Some help??

Thanks