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1.2.a) A gel permeation chromatography (GPC) instrument has been calibrated with polystyrene standards prepared with a narrow molecular weight distribution (PDI ~ 1.0). When two monodisperse poly(methyl methacrylate) samples (PDI ~ 1.0), one with an absolute $M_n$ = 140,487 g/mol and another with an absolute $M_n$ = 276,680 g/mol, were injected into the GPC instrument, they yielded an apparent molecular weight of 100,000 g/mol and 200,000 g/mol, respectively. Knowing that the Mark-Houwink-Sakurada (MHS) parameters for polystyrene equals K = 0.00716 mL/g and a = 0.76, determine the MHS parameters for poly(methyl methacrylate)? Page 2 out 3

          1.2.a) A gel permeation chromatography (GPC) instrument has been calibrated with
polystyrene standards prepared with a narrow molecular weight distribution (PDI
~ 1.0). When two monodisperse poly(methyl methacrylate) samples (PDI ~ 1.0),
one with an absolute $M_n$ = 140,487 g/mol and another with an absolute $M_n$ =
276,680 g/mol, were injected into the GPC instrument, they yielded an apparent
molecular weight of 100,000 g/mol and 200,000 g/mol, respectively. Knowing
that the Mark-Houwink-Sakurada (MHS) parameters for polystyrene equals K =
0.00716 mL/g and a = 0.76, determine the MHS parameters for poly(methyl
methacrylate)?
Page 2 out 3

12a a gel permeation chromatography gpc instrument has been calibrated with polystyrene standards prepared with a narrow molecular weight distribution pdi 10 when two monodisperse polymethyl 87444

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