Fundamentals of Polymer Engineering Part 5 ppsx

... w 0 ) of condensation product before the mixture is charged to the Reaction Engineering of Step-Growth Polymerization 161 Copyright © 2003 Marcel Dekker, Inc. 4 ReactionEngineeringof Step-GrowthPolymerization 4.1INTRODUCTION[1,2] Vesselsinwhichpolymerizationiscarriedoutarecalledreactors;theyare classifiedaccordingtoflowconditionsexistinginthem.Batchreactors(schema- ticallyshowninFig.4.1a)...

Ngày tải lên: 10/08/2014, 19:20

... Diffusion of reactants to the active sites of the resin 3. Adsorption of reactants to the active sites of the resin 4. Chemical reaction at the active sites of the resin 5. Desorption of the products Chemical ... prepared polymer, followed by second-stage polymerization 3. Immobilization of chelating organic reagents onto polymer 4. Polymerization of a nonfunctional monom...

Ngày tải lên: 10/08/2014, 19:20

... Sci., 34, 57 1 58 5, 1987. 16. Khanna, A., Simulation, Modelling and Experimental Validation of Reversible Polymerization, Ph.D. thesis, Department of Chemical Engineering, Indian Institute of Technology, ... Principles of Polymerization Engineering, Wiley, New York, 1983. 4. Kumar, A., and S. K. Gupta, Fundamentals of Polymer Science and Engineering, Tata McGraw-Hill, New...

Ngày tải lên: 10/08/2014, 19:20

... Inc. Thetotalnumberofparticlesgeneratedbythetimet 1 cannowbefoundby integratingEq.(7.4 .5) asfollows: Nðt¼t 1 Þ¼N t ¼0 :53 ½S 0 a e r  3 =5 m À2 =5 r ¼0 :53 ½S 0 a 3 =5 e r m  2 =5 ð7:4:9Þ 7.5MONOMERCONCENTRATIONINPOLYMER PARTICLES,[M] AsshowninFigure7 .5, theconcentration[M]ofthemonomerinthepolymer particlesremainsalmostconstantwithtimebecauseofdiffusionfromthe monomerdroplets.The...

Ngày tải lên: 10/08/2014, 19:20

... 38 .5 5.349 97.3 3.243 0.4 75 4.440 43.4 5. 3 95 97.9 3.3 05 0.706 4. 454 48 .5 5.440 98.4 3.366 0.999 4 .50 7 53 .5 5.4 85 98.7 3.427 1.38 4 .56 0 58 .3 5. 530 99.1 3.488 1.88 4.612 62.9 5. 574 99.3 3 .54 8 2 .51 ... 0.0 4.014 15. 2 5. 0 65 90.7 2.8 65 0.0 05 4.070 18.1 5. 113 92.2 2.929 0.020 4.126 21 .5 5.161 93.7 2.992 0. 052 4.182 25. 2 5. 209 94.8 3. 056 0.1 05 4.237...

Ngày tải lên: 10/08/2014, 19:20

... value of De or, equivalently, of the interaction parameter is needed to assure polymer polymer miscibility. Example 9.4: If the 1 g of polymer of Example 9.1 is diss olved in 9 g of a different polymer ... and composed of a series of segments the size of a solvent molecule. The number of segments in each polymer molecule is m, which equals V 2 =V 1 ,the ratio of th...

Ngày tải lên: 10/08/2014, 19:20

... here [24] quantitatively consistent with the theory of rubber elasticity? Temperature (  C) Length (mm) 20 163.0 35 158 .5 45 155 .5 48 154 .0 57 151 .0 61 149.0 10.13. Determine the Finger tensor ... Inc. NeglectingtheverylastterminEq.(10.2.7), pðmÞ¼ 2 np  1=2 e Àm 2 =2n ð10:2:8Þ whichisknownasaGaussianorNormaldistribution.Notethatforallofthese relationstobevalid,nhastobelargeandm...

Ngày tải lên: 10/08/2014, 19:20

... densities of the liquids making up the column, the sample density is r ¼ 0:864 þ 0:7ð1 :59 4 À 0:864Þ¼1:3 75 g=cm 3 and using Eq. (11.9.4) gives X ¼ 1 Àð1:3 35= 1:3 75 1 Àð1:3 35= 1: 455 Þ ¼ 0: 353 Thus, ... 16, 53 5 55 5, 1972. 40. Smith, F. S., and R. D. Steward, The Crystallization of Oriented Poly(ethylene terephthalate), Polymer, 15, 283–286, 1974. 41. Heuvel, H. M., and R. Huis...

Ngày tải lên: 10/08/2014, 19:20