Fundamentals of Polymer Engineering Part 4 docx

... A., and D. H. Sebastian, 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 ... 3.1. As a matter of fact, one of the practical methods of achieving a PDI of more than 2 is to partially recycle a portion of the product stream, as shown in Figure 3 .4 [19–22...

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... 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 t...

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... R e instead of R in Eq. (13 .4. 3) [41 ]. Thus, we have the following: D ¼ kT 6pZR e ð13 :4: 4Þ Equation (13 .4. 4) gives the correct order of magnitude for D. However, the diffusivity of nonspherical particles ... Inc. ComparingEqs.(13.9.2)and(13.2.1)givesus D¼ d 2 2t ð13:9:3Þ Returningtotheproblemofpolymerreptation,wefind,usingEq.(13.9.3),that thetimeneededforthechaintodiffuseoutofthec...

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... Dekker, Inc. 4. 2AnalysisofSemibatchReactors156 4. 3MWDofARBPolymerizationinHomogeneous Continuous-FlowStirred-TankReactors166 4. 4AdvancedStageofPolymerization169 4. 5Conclusion1 74 Appendix4.1:SimilaritySolutionofStep-Growth PolymerizationinFilmswithFiniteMassTransfer175 References181 Problems181 5.Chain-GrowthPolymerization188 5.1Introduction188 5.2RadicalPolymerization192 5.3KineticM...

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... oxide), offer another example of the formation of addition polymers: CH 2 nCH 2 O CH 2 CH 2 O n (1.3 .4) The correct method of naming an addition polymer is to write poly( ), where the name of the ... molecular structure of the graft copolymer and the number of grafts formed. In addition, the length of the graft may vary, and the graft copolymer often carries a fair amount o...

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... 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 ... functional monomers on already prepared polymer, followed by second-stage polymerization 3. Immobilization of chelating organic reagents onto polymer 4. Polymeriz...

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... 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)arethoseinwhichmaterialsarechargedinitiallyand polymerizati...

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... third stage of emulsion polymerization. Comparison of Eqs. (7 .4. 9) and (7.3.28) reveals that the rate of polymer- ization in stage II of emulsion polymerization is proportional to [I] 0 .40 . This proportionality ... polymerization. Thus, polymer radicals lie only within these polymer particles. The total number of polymer particles per unit volume of emulsion in the se...

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... 0. 343 4. 346 38.5 5. 349 97.3 3. 243 0 .47 5 4. 440 43 .4 5.395 97.9 3.305 0.706 4. 4 54 48.5 5 .44 0 98 .4 3.366 0.999 4. 507 53.5 5 .48 5 98.7 3 .42 7 1.38 4. 560 58.3 5.530 99.1 3 .48 8 1.88 4. 612 62.9 5.5 74 99.3 3. 548 ... 99.3 3. 548 2.51 4. 6 64 67.3 5.618 99.5 3.607 3.30 4. 715 71 .4 5.662 99.7 3.667 4. 28 4. 766 75.1 5.705 99.8 3.725 5 .46 4. 817 78.15 5.789 99.9...

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... a combination of Eqs. (10 .4. 4) and (10 .4. 5) yields W ¼À NkT 2 l 3 0 l 2 1 þ 2 l 1 À 3  ð10 :4: 6Þ FIGURE 10.5 Uniaxial extension of a block of rubber. Theory of Rubber Elasticity 41 9 Copyright ... Characterization of Elastomer Networks, J. Chem. Ed., 64, 49 1 49 4, 1987. 14. Mooney, M., A Theory of Large Elastic Deformation, J. Appl. Phys., 11, 582–592, 1 940 . 15. Flory...

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