A three-parameter equation for molecular weight distribution of low-density polyethyleneA new three-parameter distribution function is proposed which fits best the experimental molecular weight distribution curves of branched lowdensity polyethylenes. The data were interpreted from GPC measurements, and a ...
Given polymer material with molecular weight known, the weight per chain is mpolymer=MW¯NA whereMW¯is the weight-averaged molecular weight acquired from GPC measurement, andNAis the Avogadro number. Given sphere nanoparticle (NP) where polymers are grafted on with radiusR, the surface area ...
Molecular weight determination in degraded oxidizable and hydrolyzable polymers giving deviation from accurate using calibration and the Mark-Houwink-Sakaruda (... B Erlandsson,AC Albertsson,S Karlsson 被引量: 0发表: 1997年 Macromolecular Architecture-Nature as a Model for Degradable Polymers Nature us...
The solvent used for PEN was a 50/50 (v/v) mixture of phenol (>99%, Aldrich) and 1,2,4-trichlorobenzene (>99%, Aldrich); the viscosity measurements were made at 30[degrees]C, and the Mark-Houwink equation employed to calculate the number average molecular weight was derived from the...
Juraj Fedor, in Advances In Atomic, Molecular, and Optical Physics, 2017 4 Arrhenius Law for DEA Many of the DEA reactions studied experimentally were found to obey the Arrhenius equation (2)K=Aexp−Ea/T albeit over rather limited temperature ranges. Here, K is the rate coefficient, T is...
Some investigators have also employed a two-site or two-surface Langmuir equation to describe sorption data for an adsorbent with two sites of different affinities. This equation can be expressed as (5.6)q=b1k1C1+k1C+b2k2C1+k2C, where the subscripts refer to sites 1 and 2, e.g., adsor...
Physical properties of air can be represented by the real gas equation, which is the modified version of ideal gas equation. Dry air obeys the ideal gas law, where: ρd= density of dry air kg - m-3 Ma= molecular weight of air (28.97 kg / mol) ...
158 is the molecular weight. I divide the amount i took (.14 g) by the molecular weight to get the moles.I then convert this into milimoles. I can only repeat - 158 is not the number you are looking for. And you still need balanced equation. The one you wrote is almost OK, but...
The Mark-Houwink K and a constants have been measured at 35掳 C over a wide range of molecular weights in an aqueous solution of sodium nitrate, a commonly used mobile phase for SEC-molecular weight characterization of polyvinyl alcohol). Absolute molecular weights determined using these Mark-...
Radiation synthesis of low swelling acrylamide based hydrogels and determination of average molecular weight between cross-links Large differences were attributed to the uncertainty on the value of the chi parameter used in the Flory-Rehner equation. +/- 1% change in this ... Mahmudi,Sen,Rendevski...