EMA6165-lect-08 - f Anthony B Brennan Research Group...

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Unformatted text preview: f: Anthony B. Brennan Research Group - Windows Internet Explorer 61E} v http:flbrennanmse.ufl.edu!em36165_new.html er ‘? X 7 — — ‘ p ' File Edit View Favorites Tools Help links ” )1) fl ' |:_;}Page - [email protected] v i} 4% [Emmi B. BrennanResearchGroup l7 t) K Engineering Group News and Events NEWS RELEASE: ONR Research EMA 6165: Polymer Phyiscal Science Other Research Chelsea Magin Receives NOTICE: UPDATED September 12, .2008 "Best Poster Award" at the 14th International _ Congress on Marine Department Links Updated Lecture Notes Co "051.0" and Fouling _ Kobe, Japan, July 2008 Courses “F 5““ Class Material Previous Lecture Notes . Sharklet Technologies, Collaborators Exams _.._ __ LLC is launched — Fall 2008 Syllabus Lemme Notes v October 200?. Home Fall 2003 Schedule Previous Exams V} Cg. k I f th L *1 Ic rare or 0 er news DISCUSSION FORUM releases on the Gator Exam Search Solutions : References v _ - Lemme Power pmm ' ' Click Here for Photos of ' ' _ Gator Engineered — Exam1 Key Thermal Properties sharkote Surfaces : v Exam 2 Key Equations Contact Us [email protected]fl.edu Link: EDGE TEXT BOOK REQUIRED: An Introduction to Polymer Physics, David I. Bower (2002), Cambridge University Press, ISBN number: ISBN 978-0-521-63721-3 Anyone who is unable to view the Microsoft PowerPoint lecture notes should contact abrennan imse‘ufl‘edu for assistance. Group Resources i‘_ I I Academic Technology 1": start ' ) ': f: Anthony E. Brennan E Lecture3.ppt [Read-... 12'] Lecture4.ppt [Read-... 12'] LectureS.ppt [Read-... - I ‘\,- 9:35 AM ( http:flbrennan.mse.Lf|.edu.lcontact_abren.html t <r‘l H9. _ o TOO‘t m BCW‘J 9%Wd ‘e'MA’JD‘WA ObiS'l‘m cram ' . FIQQIJ TD'ta'hnj Chaim dreshl‘chd b3 bowd M633” L; ' - ‘ mew (Mahatth —: 107.5 c- c _ c 9 —_ :0? 5 , fleskfo‘md mow 97409.5" ‘6 :: wfimw mafia awvibufi' lo 5%ud'w’t ow anUPM Chain Dimensions Rotational Isomers Ref: Chem Draw Pro — ethane_conformers ° Staggered conformation — Erot~ 0 lemol, (D = 60, 180, 300 deg. - Eclipsed - Erot~ 12 lemol, (D = 0/360, 120, 240 deg. - Staggered 0 lemol < Er0t < 0 lemol, EMA 6165 Polymer Physics — AB Brennan - 4 Chain Dimensions Conformational States O : {07.506 Q ao'jg’f hm éy‘ Number of Conformation States is: N=RIH RIS = Number of Rotational Isomeric States (Gauche+. Trans. Gauche-) n = number of sigma bonds in chain backbone N = 1 X 104770 for PE Where X11 ~ 10,000 1 339/mgmgw 380,000 jjme EMA 6165 Polymer Physics — AB Brennan 8 Chain Dimensions Gaussian Chain ngnéefigg - Random Chain Conformation - End-to-End Distance <ro> - Radius of Gyration <rg> ‘L < E < (‘0 > Figure 2.6 Gaussian chain. (0 EMA 6165 Polymer Physics — AB Brennan 9 Chain Dimensions Hemline 12 mean 55an i: - and <’”2>=1n— <SZ>=— Mww 2m]. “ 6 i=1 End to End Distance Radius of Gyration m - mass of repeat unit (segment) r - vector form center of gravity to atom i EMA 6165 Polymer Physics - AB Brennan 11 Materials '\ Chain Dimensions “EL—1&3}? Experimental Determination of Hydrodynamic Volume Englhée'nng 9+?” Good solvent: Theta solvent: Poor solvent: a>1 a=1 a<1 Figure 2.7 Random coils in solvents of different solvent power; or is the linear coil expansion Factor which according M maman EMA 6165 Polymer Physics — AB Brennan 5% 12 Chain Dimensions Scattering Function <91 -* 5’?“ > c - concentration of scattering species @ayleigh ratio (reduced intensity) r - distance from scattering center to detector. 10 - incident wave intensity A2 - 2nd Virial coefficient K - contrast factor (dated) to UM EMA 6165 Polymer Physics — AB Brennan 14 Chain Dimensions Generation of a Zimm Plot E 66mg ficaW' M361 1. IL KC 1 2A 1111 v — = T + C 6—>() 2 R6 MW l, Kc, 1 116 2<I»2).29 1m -—=T+T—7Z' SlIl — H“ M M, 3 6/12 2 T 6 U U EMA 6165 Polymer Physics — AB Brennan 16 Chain Dimensions Zimm Plot sin2(9/2) + (39 Figure 2.8 Schematic Zimm plot. EMA 6165 Polymer Physics — AB Brennan 17 ' ' - Science-v Chaln DlmenSIons {ffiflfiké Characteristic Dimensions Engmeemg <fl§=ga2 Chm ofme —— . do bo-HL bone! cwx 0M4 Where. “d Yea-mm re swag?“ <r2>a- chain dimensions at Theta conditions C - Characteristic Chain Ratio n - number of segments 1 - segment dimension (length) fl : GNU/~96th EMA 6165 Polymer Physics — AB Brennan 18 - - - Science-v Chain DimenSIons scale—33x Characteristic Dimensions E (F2 >0 : Where: <1‘2>O - chain dimensions at Theta conditions C - Characteristic Chain Ratio. bmo‘o M WWW Chm n - number of W $4M l - segment dimension (length) EMA 6165 Polymer Physics — AB Brennan 18 ...
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EMA6165-lect-08 - f Anthony B Brennan Research Group...

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