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Fractionation of linear polyethylene with gel permeation chromatography. IV
Author(s) -
Nakajima Nobuyuki
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070151216
Subject(s) - reproducibility , fractionation , gel permeation chromatography , molar mass distribution , polyethylene , calibration , polystyrene , chromatography , analytical chemistry (journal) , standard deviation , materials science , chemistry , mathematics , polymer , composite material , statistics
Reproducibility was examined on the GPC fractionation of linear polyethylenes. The experiences over the period of two and a half years were used. Calibration was done with the same batches of narrow distribution polystyrene standards. A control sample of broad‐distribution polyethylene was run at each calibration. The reproducibility over ten calibrations with this control was in terms of standard deviation of ca. ±10% for the number‐average and ca. ±15% for the weight‐average chain length. The fractionation data of 36 commercial resins were corrected by using the control samples as an additional standard. The correction was very effective in decreasing the scattering of the data in the intrinsic viscosity–molecular weight plot, especially when the viscosity average was used for the molecular weight expression.