MIL-HDBK-17-1F Volume 1,Chapter 4 Matrix Characterization TABLE 4.4.5 Polymer molecular weights,molecular Special Techniques Parameters Measured Chromatographic Fractionation Molecular weight distribution.An absolute MW technique is needed to analyze fractions. Melt Rheometry Weight-average mol.wgt.M (g/mol)and weight-fraction differential molecular weight distribution semi-empirical method. Gel-Sol Analysis of Crosslinked Poly- Gel fraction,Crosslink density mers Swelling Equilibrium Network structure,crosslink density,number-average mol. wgt.of chains between crosslinks M.. Promising Techniques Parameters Measured Laser Light Scattering (quasi-elastic, Same as Rayleigh light scattering plus trans-diffusion coeffi- line-broadening or dynamic) cient,molecular weight distribution,and information relating to gel structure. Field Flow Fractionation(FFF) Mol.wgt.averages and MWD.Requires calibration. Non-Aqueous Reverse-Phase High Mol.wgt.averages and MWD.Requires calibration. Performance Liquid Chromatography HPLC and Thin-Layer Chromatogra- phy TLC Supercritical Fluid Chromatography Mol.wgt.averages and MWD.Requires calibration. (SFC) Neutron Scattering Small Angle Weight-average mol.wgt.Mw(g/mol),Virial coefficient A2 (SANS) (mol-cc/g )Radius of gyration <Rz(A) 4-10MIL-HDBK-17-1F Volume 1, Chapter 4 Matrix Characterization 4-10 TABLE 4.4.5 Polymer molecular weights, molecular Special Techniques Parameters Measured Chromatographic Fractionation Molecular weight distribution. An absolute MW technique is needed to analyze fractions. Melt Rheometry Weight-average mol. wgt. Mw (g/mol) and weight-fraction differential molecular weight distribution semi-empirical method. Gel-Sol Analysis of Crosslinked Poly￾mers Gel fraction, Crosslink density Swelling Equilibrium Network structure, crosslink density, number- average mol. wgt. of chains between crosslinks Mc. Promising Techniques Parameters Measured Laser Light Scattering (quasi-elastic, line-broadening or dynamic) Same as Rayleigh light scattering plus trans-diffusion coeffi￾cient, molecular weight distribution, and information relating to gel structure. Field Flow Fractionation (FFF) Mol. wgt. averages and MWD. Requires calibration. Non-Aqueous Reverse-Phase High Performance Liquid Chromatography HPLC and Thin-Layer Chromatogra￾phy TLC Mol. wgt. averages and MWD. Requires calibration. Supercritical Fluid Chromatography (SFC) Mol. wgt. averages and MWD. Requires calibration. Neutron Scattering Small Angle (SANS) Weight-average mol. wgt. Mw (g/mol), Virial coefficient A2 (mol-cc/g2 ), Radius of gyration <Rg>z (A)