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DryAdd Complements Characterization
Many important properties are given directly by DryAdd. Others can be related to parameters that DryAdd calculates.
| Property
|
Conventional Characterization Techniques | How DryAdd Helps | ||
|---|---|---|---|---|
Linear Systems |
Crosslinked Networks |
Parameters given directly by DryAdd |
Parameters given by DryAdd which relate to properties |
|
| Molecular Weights | GPC
solution viscometry SAXS LALS |
Number, weight and centrifuge average molecular weights
Largest and average molecular weights available in plots vs time, temp. or conversion.
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| Molecular weight distributions | GPC | Weight at weight, number at size and number at weight plots available with both linear and logarithmic x-axes | ||
| Polydispersity | GPC | Polydispersity Index |
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| Young's Modulus, E | Tensile Tests
DMTA |
Tensile Tests
Swelling |
Average molecular weight between crosslinks ( Mc) which , used in conjunction with density gives Young's modulus | |
| Shear Modulus, G | viscometry, rheometry, DMTA | Rheometry
Swelling |
Mc, which, used in conjunction with density. gives shear modulus | |
| Glass Transition Temperature | DSC, DMTA | DSC, DMTA | DryAdd gives degree of conversion, molecular weights and Mc. These, in conjunction with heat capacities, and Tgs for an infinitely-crosslinked and un-crosslinked network, give Tg for the crosslinked network. | |
| Density |
density-gradient column | density-gradient column | DryAdd gives Mc which, used in conjunction with the number of chains per unit volume, gives density. | |
| Gel Point | rheometry | Plots of largest group and secondary cycles - a sharp increase in slope indicates gel point. | ||
| Phase Separation | NMR
SAXS SALS |
The sequence analysis gives the number of occurrences of a specified sequence, for crosslinked systems. For linear systems, the frequency at size, size at size, frequency at weight and weight at weight are calculated. These indicate the magnitude of phase separation. | ||
| Extent of Reaction | FTIR, solution viscometry | FTIR | Degree of conversion given directly, plots of unreacted monomers and sites available vs conversion, time or temperature. | |
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