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diff --git a/Materials_science_and_engineering_an_introduction/CH14.ipynb b/Materials_science_and_engineering_an_introduction/CH14.ipynb new file mode 100644 index 00000000..7ade4dbe --- /dev/null +++ b/Materials_science_and_engineering_an_introduction/CH14.ipynb @@ -0,0 +1,228 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 14: Polymer Structure"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 14.1 Page No 499"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Computation of average Molecular wt and Degree of Polymerisation\n",
+ "\n",
+ "#Given\n",
+ "#For different molecular wt range ,\n",
+ "#From Table 14.1 (a)\n",
+ "Mi1=7500 #g/mol , Molecular wt\n",
+ "Mi2=12500 \n",
+ "Mi3=17500\n",
+ "Mi4=22500\n",
+ "Mi5=27500\n",
+ "Mi6=32500\n",
+ "Mi7=37500\n",
+ "xi1=0.05 #Number fraction\n",
+ "xi2=0.16\n",
+ "xi3=0.22\n",
+ "xi4=0.27\n",
+ "xi5=0.2\n",
+ "xi6=0.08\n",
+ "xi7=0.02\n",
+ "\n",
+ "#Calculation\n",
+ "xM1=Mi1*xi1\n",
+ "xM2=Mi2*xi2\n",
+ "xM3=Mi3*xi3\n",
+ "xM4=Mi4*xi4\n",
+ "xM5=Mi5*xi5\n",
+ "xM6=Mi6*xi6\n",
+ "xM7=Mi7*xi7\n",
+ "xM=xM1+xM2+xM3+xM4+xM5+xM6+xM7\n",
+ "\n",
+ "#(b)\n",
+ "nC=2 #no of carbon atoms in repeat unit\n",
+ "nH=3 #no of hydrogen atoms in repeat unit\n",
+ "nCl=1 #no of chlorine atoms in repeat unit\n",
+ "MwC=12.01 #Molecular wt of carbon\n",
+ "MwH=1.01 #Molecular wt of Hydogen\n",
+ "MwCl=35.45 #Molecular wt of chlorine\n",
+ "m=nC*MwC+nH*MwH+nCl*MwCl #Total wt for PVC\n",
+ "DP=xM/m\n",
+ "\n",
+ "#(c) from fig 14.3 (b)\n",
+ "wi1=0.02 #weight fraction\n",
+ "wi2=0.1\n",
+ "wi3=0.18\n",
+ "wi4=0.29\n",
+ "wi5=0.26\n",
+ "wi6=0.13\n",
+ "wi7=0.02\n",
+ "\n",
+ "#Calculation\n",
+ "wM1=Mi1*wi1\n",
+ "wM2=Mi2*wi2\n",
+ "wM3=Mi3*wi3\n",
+ "wM4=Mi4*wi4\n",
+ "wM5=Mi5*wi5\n",
+ "wM6=Mi6*wi6\n",
+ "wM7=Mi7*wi7\n",
+ "wM=wM1+wM2+wM3+wM4+wM5+wM6+wM7\n",
+ "\n",
+ "#Result\n",
+ "print\"(a)The no Av Molecular wt is\",xM,\"g/mol\"\n",
+ "print\"(b)Degree of Polymerisation is\",round(DP,0)\n",
+ "print\"(c)The weight Av Molecular wt is\",wM,\"g/mol\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a)The no Av Molecular wt is 21150.0 g/mol\n",
+ "(b)Degree of Polymerisation is 338.0\n",
+ "(c)The weight Av Molecular wt is 23200.0 g/mol\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 14.2 Page No 511"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Computations of the Density\n",
+ "\n",
+ "#Given\n",
+ "Ac=12.01 #in g/mol Molecular weight of Carbon\n",
+ "Ah=1.008 #in g/mol molecular weight of hydrogen\n",
+ "a=7.41*10**-8 #in cm\n",
+ "b=4.94*10**-8 #in cm\n",
+ "c=2.55*10**-8 #in cm\n",
+ "Na=6.023*10**23\n",
+ "\n",
+ "#calculation\n",
+ "Vc=a*b*c\n",
+ "n=2\n",
+ "A=(2*Ac)+(4*Ah)\n",
+ "density_c=n*A/(Vc*Na)\n",
+ "\n",
+ "#(b)Percent Crystallinity of Polyethylene\n",
+ "density_a=0.870 # in g/cm**3\n",
+ "density_s=0.925 # in g/cm**3\n",
+ "pc=density_c*(density_s-density_a)*100/(density_s*(density_c-density_a))\n",
+ "\n",
+ "#Result\n",
+ "print\"(a)Density is\",round(density_c,3),\"g/cm**3\"\n",
+ "print\"(b)percentage crystallinity is\",round(pc,1),\"%\"\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a)Density is 0.998 g/cm**3\n",
+ "(b)percentage crystallinity is 46.4 %\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 14.3 Page No 516"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Computations of Diffusion Flux of Carbon dioxide through Plasic Beverage Container\n",
+ "\n",
+ "#function[A]= approx(V,n)\n",
+ "# A= round(V*10**n)/10**n\n",
+ "# funcprot(0)\n",
+ "#endfunction\n",
+ "\n",
+ "#print\"\\tExample 14.3\\n\")\n",
+ "\n",
+ "#a\n",
+ "P1=400000.0 # in Pa Pressure inside the bottle\n",
+ "P2=400.0 # in Pa Pressure outside the bottle\n",
+ "Pm=0.23*10**-13 #Solubility Coefficient\n",
+ "dx=0.05 # in cm Thickness of wall\n",
+ "\n",
+ "#calculation\n",
+ "J=(-Pm*(P2-P1)/dx)\n",
+ "#(b)Beverage Shell Life\n",
+ "\n",
+ "A=500 #surface area of bottle in cm**2\n",
+ "V_lose=750.0 #cm**3 STP\n",
+ "V=J*A\n",
+ "t=V_lose/round(V,5)\n",
+ "\n",
+ "#Result\n",
+ "print\"Diffusion flux is \",round(J,9),\"cm**3 STP/cm**2-s\"\n",
+ "print\"Time to escape is \",round(t/(3600*24),1),\"days\"\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Diffusion flux is 1.84e-07 cm**3 STP/cm**2-s\n",
+ "Time to escape is 96.5 days\n"
+ ]
+ }
+ ],
+ "prompt_number": 20
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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