Chapter 17 : Ceramics and Plastics

Example 17.1 pageno : 467

In [1]:
# Variables
mc = 12.;			#mol wt of carbon
mh = 1.;			#mol wt of hydrogen
m = 8.*(mc+mh);			#mol wt of C8H8
DOP = 10000.;			#degree of polarization , given

# Calculations
mp = DOP*m;

# Results
print "Molecualr weight of Styrene polymer  =  %.2e "%mp

Molecualr weight of Styrene polymer  =  1.04e+06

Example 17.2 pageno : 468

In [6]:
# Variables
DOP = 100000.;
mc = 12.;			#mol wt of carbon
mf = 19.;			#mol wt of fluorine

# Calculations
m = (2*mc)+(4*mf);			#mol wt of teflon monomer
mp = DOP*m;
mh = 1.;			#mol wt of hydrogen
m1 = (2*mc)+(4*mh);			#mol wt of polyethylene
#for same DOP
x = m/m1;			#ratio of molecular weights

# Results
print "Molecualr weight of Teflon polymer  =  %e"%mp
print "Ratio of molecualr weights of Teflon and Polyethylene  =  %.2f"%x

Molecualr weight of Teflon polymer  =  1.000000e+07
Ratio of molecualr weights of Teflon and Polyethylene  =  3.57