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Section 6-Viscocity2 - C“ 20.25828 om 3m mm o o mm> o o...

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Unformatted text preview: C“: . 20.25828 om; 3m... . mm; o: o: mm> . o: o: oco: 90:53.3. $Emé 9.6 3-3 . 9.6 3-2 9.6 8-9 3-2. 3 3 .50 56.95 mom a 2:“. a 87qu 4 26A 0879: 0.632 com: .88 6260 0.. 362 mg? m 1.2 :266m 925 ._ 356$ng 295 cozmcflmo 22:8: Emcoémucflxm 62.29.. Emmaoma mcozmehoEoo EEomBEEomE .5 mmEonE 4mm cm: 2.5:. om; 2E1 3 P v \ 13017 COZGELOHEOO m:m.:-=< $5825 520 Hmmmdx - ad Umncmflxm 15 09;. 3.4.“. ZOC<mHszZOO , thJOm \ x x ‘ § ‘ x s \ x s x x u s s x x \ s s 5 \ x \ s ‘ othomE< _ oEozom. >twOOmS n_O._ .2 :ozmbcmocoo .m> EmoomS ‘16 F‘- .;_ om; 3m... +111]. ZO_._.<m.er_OZOO mtjom >ma£mm ~ cofiuaezom m, From; . E530MAOE 4/ 335$ cozgommfi HEEOOmS 5:20.065 m> 335$ :ozmutmana Macromolecules 1993, 26, 5633—5642 5638 Aramid and Imidazole Based Polyelectrolytes: Physical Properties and Ternary Phase Behavior with Polywenzobiathiazole) in Methanesulfonic Acid Melinda B. Ginselman Specialty Materials Division, 3!»! Com :3 , 3M Buildi - - St Paul. Minnesota 55144-1000 pa y "'8 236 33 01’ John R. Reynolds’ Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida. Gaineaville, Florida 32611 Received February 23, 1993' Absorbance 0 5 Macromolecules, Val. 26, No. 21, 1.993 IS 20 25 30 35 Eluliun Time (Minutes) Figure 2. Gel permeation chrom f - Eluent is 0.3 M aqueous NaO atogram or PBI P3015“). Table IV. Aqueous GPC Results for PPTA—PS, PPTA-B 28, and PHI-PS st Varied Sulfonntion Lovell sample MW Mn Mw/Mn FHA-P303156) 16 800 16 300 a PPTA-PS(0.66} 16 100 15 700 a PPTA-PS(0.75) 15 900 15 500 a PPTA-PS(O.47) 21 100 18 100 a PPTA-BZS(0.53) 25 700 20 700 a PPTA—BZS(0.66) 31 300 23 600 a PPTA—BzS(U.66) 34 700 25 800 a PBI-PSWHQ)" 1'73 500 57 700 3.1 PBI-PS(0.54) 120 500 45 700 2.6 PBI-PS(1.13) 120 700 55 700 2.2 “ Value not reliable due to tailing in chmmatogram. 5 S/N ratio and “3C NMR indicate that some imidnzole rings are substituted on both nitrogen atoms. I PPTA-BzS (0.57) . FBI—PS (0.54) A PBl-BzS (0.39) - PPTA-PS (0.66) Reduced Viscosity (dLig) 0.0 0.5 1.0 1.5 2.0 2.5 Concentration (gldL) Figure 3.9. Intrinsic viscosity determination for samples of the four new polyelectroiytes. Data is identified in legend on graph. 9/1 ‘Dmsa/HLO Ji- \°l’= “Hi L;L) —.— PBi-BzS (0.39) —l— PPTA-BzS (0.67) .—._... PEI-PS (0.54) --—-*— PPTA-PS x10 (0.66) Reduced Viscosity (dllg) 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 Concentration (g/dL) Figure 3.10. Demonstration of the "poiyelectrolyte effect " for the four new polyelectrolytes in this study. Polymers and their substitution levels are identified in the legend. Salt free solvent is water for the PPTA derivatives and DMSO forthe PBI derivatives. ...
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