DETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHYDETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHY
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DETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHYDETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHY
Vol. 4, Issue 1, Pages: 78-83(1986)
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Published:20 March 1986
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XU Mao, LI Peiji, WANG Ying, et al. DETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHYDETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHY[J]. 1986, 4(1): 78-83.
DOI:
XU Mao, LI Peiji, WANG Ying, et al. DETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHYDETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHY[J]. 1986, 4(1): 78-83.DOI:
DETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHYDETERMINATION OF COMPOSITION DISTRIBUTION OF SEGMENTED POLYURETHANES BY THIN LAYER CHROMATOGRAPHY
The compositional heterogeneity has been studied for a series of PCL/MDI/BDO segmentedpolyurethanes. Their average hard segment content measured by NMR method was ranging from 17% to 42%. Macromolecules of segmented polyurethanes can be separated according to theircomposition by TLC technique with a mixed solvent of toluene/acetone/ tetrahydrofuran as the devel-oper. A dual wavelength TLC spectrodensitometer was used for quantitative analysis of TLC results
and method for data treatment is proposed to obtain the composition distribution with no need of any reference samples as TLC eluticn standards.The polyurethane samples are found to be heterogeneous in composition
having bimodal distribution curves.
Abstract
The compositional heterogeneity has been studied for a series of PCL/MDI/BDO segmentedpolyurethanes. Their average hard segment content measured by NMR method was ranging from 17% to 42%. Macromolecules of segmented polyurethanes can be separated according to theircomposition by TLC technique with a mixed solvent of toluene/acetone/ tetrahydrofuran as the devel-oper. A dual wavelength TLC spectrodensitometer was used for quantitative analysis of TLC results
and method for data treatment is proposed to obtain the composition distribution with no need of any reference samples as TLC eluticn standards.The polyurethane samples are found to be heterogeneous in composition
having bimodal distribution curves.
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