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determined by size exclusion chromatography (SEC), using literature Mark‐Houwink coefficients. The MWD is characterized by the number average molecular weight (Mn), the weight average molecular weight (Mw ...
the degree of long-chain branching . INTRODUCTION Gel permeation chromatography (GPC) has become a popular method for determining of the molecular weight distribution (MWD) of polymers. Considerable ...
the calibrated molecular weights , such as by using the differential refractive index detector (RI), and (2) a detector that determines the weight ‐average molecular weight of polymers within the elution volume ...
broadening (the conventional calibration curve), this is not the case for complex branched polymers: a sample wherein all chains have the same hydrodynamic volume may have a distribution of molecular weights ...
A low‐angle laser light scattering detector (LALLS) used with size exclusion chromatography (SEC/LALLS) has been applied for the determination of molecular weight , molecular weight distribution (MWD ...
chromatography only yields inaccurate molecular weight distributions for some complex branched polymers. Hydrodynamic volume distributions have then a strong potential for comparative studies owing to their far ...
and a viscometer) to determine the molecular sizes and architectures ( branching ). The polymer samples included high‐ and low‐density polyethylenes with different molecular weight distributions (wide, medium ...
The object of this study is to develop multidetector size ‐exclusion chromatography (SEC) methods to determine the number of arms per molecule across the molecular size distribution of star‐ branched ...
and improve polymer processing. For better understanding of structure–property relationship, clear determination of the structural parameters such as molecular weight and branching are required. Despite ...
as a function of DP, and a simplified model function b = A log P + B was used to investigate the elution curve of size exclusion chromatography (SEC). It is shown that, although the molecular weight distribution ...
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