Molecular weight distribution of poly

Table I. Transfer to Perfusate for Several Fluorophore-labelled Molecular Weight Distributions of Poly(hydroxyethylaspartamide)a...

Mills, N.J. The rheological properties and molecular weight distribution of poly-dimethylsiloxane. European Polymer J. 5,675-695 (1969). 

Chul-Yung Cha The molecular weight distribution of poly (ethylene tereph-thalate) from solid state polycondensation. Polymer Preprints, Am. Chem. Soc. Polymer Div. 6, 84 (1965). 

Figure 9.10 Molecular-weight distribution of poly(butyl acrylate) produced by the...

Table 5.5. Dependence of molecular weight and molecular weight distribution of poly-3-methyloxetane (MCMO) on conversion [MCMO]0 = 0.55 mol l 1, [(i-C4H9)3Al]0 = 10-2 mol 1-, [H2O]0(ldded) = 3 10 5 mol l1, C6H5C1,...

Figure 11.2. Molecular weight distribution of poly(methylphenylsilane) prepared by a Wurtz reductive-coupling in boiling toluene (Reprinted with permission from Organometallics, 1998, 17, 59. Copyright 1998 American Chemical Society).

Timofejeva, G. J. Pavlova, S. A. Wandrey Ch. Jaeger, W. Hahn, M. Linow K. -J. Gomitz, E. On the determination of the molecular weight distribution of poly(dimethyl diallyl ammonium chloride) by ultracentrifugation. Acta Polymerica, 1990, 41(9), 479 84. 

Kozlov, G. V Malkanduev Yu.A. Zaikov, G. E. Molecular weight distribution of poly(dimethyl diallyl ammonium chloride) analysis within the framewoik of irreversible aggregation model. In book Fractal Analysis of Polymers From Synthesis to Composites. Ed. Kozlov, G. Zaikov, G. Novikov, V. New York, Nova Science Publishers, Inc. 2003, 131-139. 

Similar dependence of dissolution of poly(4-hydroxystyr-ene)—the key polymer for 248 nm lithography— have been observed [32] (Fig. 57.4). Again the dissolution rate of poly(4-hydroxystyrene) decreases with increasing molecular weight of the polymer. The relatively narrow molecular weight distribution of poly(4-hydroxystyrene) was achieved by living free radical polymerization (Table 57.8). 

Kaneko, Y. Watanabe, Y. Okamoto, T. Iseda, Y. Matsunaga, T., Effect of Molecular Weight Distribution of Poly(oxytetramethylene)glycol on Cut Growth Resistance of Polyurethane. J. Appl. Polym. Sci. 1980, 25,... 

Figure 12.5 Molecular weight distribution of poly(butyl acrylate) produced in the microreactor system (solid line) and in the macroscale batch reactor (dashed line). The residence time was 4 min. From Ref [10].

Each of the two quantitative spectra of poly(ethylene glycol) (PEG) depicted in Fig. 41 exhibits an end-group (OH) resonance at 3.2 ppm and a main -O-CH2 CH2O- peak at 3.9 ppm. The molecular weights of these two products can easily be calculated by NMR, based on the relative intensity ratio of the end to main peaks. Rare spins ( C and Si) can also be used to determine molecular weight, as demonstrated for several polysilox-anes [117]. A commercially available on-line system tracks both density and melt index (which is related to molecular weight) based on wide-line H experiments [118]. GPC/NMR, a variant of LC/NMR, has been used to track the molecular-weight distribution of poly(methyl methacrylate) [119]. 

SHR Shresth, R.S., McDonald, R.C., and Greer, S.C., Molecular weight distributions of poly disperse polymers in coexisting liqnid phases, J. Chem. Phys., 117, 9037, 2002. 

Cao GP, Zhu ZN, Zhang MH, Le HH. Molecular weight distribution of poly(methyl methacrylate) produced in a starved feed reactor. J Polym Eng 2001 21 401-419. 

Kirkland and Rementer studied the molecular weight distribution of poly-isoprene using thermal field flow fractionation using Mark Houweg constants. 

Supercritical fluid chromatography combined with time of flight mass spectrometry has been used to determine the molecular weight distribution of poly(dimethylsiloxane) oligomers in the mass range 10 to 10. ... 

It has been suggested that the broad molecular weight distribution of poly(methyl methacrylate) prepared in toluene with anionic initiator could be explained in terms of a combination of two narrower distributions produced simultaneously occurring mechanisms(1). Cottam et al.(2) suggested the existence of two active species uncomplexed and complexed with lithium methoxide, respectively, in the polymerization of MMA with BuLi. Recently it was reported that in the polymerization of MMA in a mixture of toluene and THF with Grignard reagent the polymers obtained consist of two components, methanol-soluble and methanol-insoluble polymers, which are considered to form at two distinct and independent active centers(3). In the polymerization of methyl a-ethylacrylate by BuLi in toluene there exist two types of active species which produce isotactic and syndictactic polymers, respectively(4). 

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