来源期刊 Spectrochimica Acta Part B Atomic Spectroscopy 研究点推荐 polymer pyrolyzates atomic plasma emission spectroscopy multi-referencing GC-MIP spectroscopy Chromatographie eluents Empirical and molecular formula determination 引用走势 1992 被引量:6 0...
Theoretical calculations are compared to the experimental data of Walther et al. (1993) for partitioning of poly(ethylene glycol)s and poly(ethylene oxide)s of various molecular weight into hydrogels made of poly-N-isopropylacrylamide or poly-2-hydroxyethyl......
MASS SPECTROMETRYTRACE ELEMENT ANALYSISDETERMINATION OF HALIDESIn order to determine the molecular weight of a polymer by GPC in the low MW region, a secondary calibration method can be established when polymer standards of the analysed polymer are not available (1). The efficiency of this method ...
2. Determination of polymer molecular weight and Huggins parameters by membrane permeation method Osmotic pressure is the pressure in the solution due to solute particles, and the properties of the polymer solution can be estimated based on the osmotic pressure calculation formula of a reliable solutio...
GPC is the most commonly used technique for determination of molecular weight. In GPC, a dilute solution of the analyte in question is prepared using a good solvent for the analyte to ensure good dissolution and expansion of the polymer chains in solution. The solution is injected into a ...
Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44152, 01-224 Warsaw, Poland (Received August 15, 1985) ABSTRACT: A new relative method of polymer weight determination is developed on the basis of the previously [Polym. J., 18, 783 (1986)] elaborated permeable sphere ...
molecular rotors, farnesyl-(2-carboxy-2-cyanovinyl)-julolidine (FCVJ), can be used as an active probe for precise determination of the M dependence of η and the entanglement molecular weight of a polymer by using a molecular weight series of poly-(propylene oxide) (PPOX) as model ...
The molecular weight dependence was investigated in detail to reveal the type of molecular weight average. This enables a fast determination of the molecular weight by use of spin coating. The use of model molecular weight distributions yields a relation to number M n and weight M w average ...
2.4.3Determination of the molecular mass of PVB Themolecular weightof self-madePVBwas measured byGel permeation chromatography(GPC), in whichtetrahydrofuranandpolystyrenewere selected as the test solvent and the standard sample respectively. The mass averagemolecular weight(Mw) was tested as 68.696 kg...
1 A polymer is a high molecular weight material having many units of small molecules chemically joined or linked by normal covalent bonds to form long chain molecules. From:Shreir's Corrosion,2010 About this page Set alert Also in subject area: ...