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Molar Mass and Molar Mass Distribution of Polystyrene Particle Size Standards
Analytical Chemistry, 2005Monodisperse polystyrene microspheres and nanospheres are often used as particle size standards for calibration of size-measuring instruments. They are potentially useful as the mass standards for particle mass spectrometry as well. We demonstrated in this work that it is possible to achieve high-precision mass determination for single polystyrene ...
Wen-Ping, Peng +3 more
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Potential of Benchtop NMR for the Determination of Polymer Molar Masses, Molar Mass Distributions, and Chemical Composition Profiles by Means of Diffusion‐Ordered Spectroscopy, DOSY [PDF]
Macromolecular rapid communicationsThe determination of molar masses and their distributions is crucial in polymer synthesis and design. This work presents the current performance and limitations of diffusion‐ordered spectroscopy (DOSY) on a low‐field (benchtop) NMR spectrometer (at 90 ...
Johanna Tratz +4 more
semanticscholar +2 more sources
Molar mass distribution and solubility modeling of asphaltenes
AIChE Journal, 1996AbstractAttempts to model asphaltene solubility with Scatchard‐Hildebrand theory were hampered by uncertainty in molar volume and solubility parameter distribution within the asphaltenes. By considering asphaltenes as a series of polyaromatic hydrocarbons with randomly distributed associated functional groups, molar volume and solubility parameter ...
Harvey W. Yarranton, Jocob H. Masliyah
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Isotactic Polystyrene Reactor Blends with Tailored Bimodal Molar Mass Distribution
Macromolecules, 2013Reactor blend formation of soluble highly isotactic polystyrene (iPS) enables tailoring of bimodal iPS molar mass distributions containing variable amounts of ultrahigh molar mass iPS (UHMWiPS). A key feature is the facile iPS molar mass control, achieved by homogeneous catalytic styrene polymerization on a MAO-activated titanium bisphenolate catalyst,
Vielhauer, Maximilian +4 more
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Die Angewandte Makromolekulare Chemie, 1983
AbstractThe first part of this publication dealt with the effect of synthesis conditions on short and long‐chain branching of low density polyethylene; this second part reports on the effect on the molar mass, the molar mass distribution and the polydispersity that can be determined from these parameters.
Gerhard Luft, Rudolf Kämpf, Hans Seidl
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AbstractThe first part of this publication dealt with the effect of synthesis conditions on short and long‐chain branching of low density polyethylene; this second part reports on the effect on the molar mass, the molar mass distribution and the polydispersity that can be determined from these parameters.
Gerhard Luft, Rudolf Kämpf, Hans Seidl
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Textile research journal, 2019
The aim of this study is to improve the understanding of which end-of-life cellulosic textiles can be used for chemical recycling according to their composition, wear life and laundering—domestic versus service sector.
Helena Wedin +3 more
semanticscholar +1 more source
The aim of this study is to improve the understanding of which end-of-life cellulosic textiles can be used for chemical recycling according to their composition, wear life and laundering—domestic versus service sector.
Helena Wedin +3 more
semanticscholar +1 more source
Molar Masses and Molar Mass Distributions of Chitin and Acid-Hydrolyzed Chitin
Biomacromolecules, 2017Never-dried and dried crab shell chitin and squid pen chitin samples were acid-hydrolyzed in 1 M HCl at 85 °C for up to 2 h. The crystallinities, crystal sizes, and degrees of N-acetylation of the acid-hydrolyzed chitin samples are almost unchanged the same before and after acid hydrolysis. The original and acid-hydrolyzed chitin samples were dissolved
Ryunosuke Funahashi +4 more
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Molar‐mass distribution of celluloses
Makromolekulare Chemie. Macromolecular Symposia, 1992AbstractThe investigation of polymers by gel permeation chromatography has become a standard method for the determination of the molecular weight distribution. In case of cellulose and pulps the samples are mostly carbanilated or nitrated in order to get them soluble in organic solvents.
Bodo Saake +4 more
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