Table 3. Composition and Molecular Weight Distributions of RPU1 and RCPU1.
| sample | isocyanate source | isocyanate | polyol | chain extender | Mn (g/mol)a | Mw (g/mol)a | Đ(Mw/Mn)a |
|---|---|---|---|---|---|---|---|
| RPU1 | PU1 | MDI | PTMO | BDO | 12,000 | 20,800 | 1.7 |
| RCPU1 | CPU1 | MDI | PTMO | BDO | 8,100 | 17,700 | 2.2 |
Calculated from GPC in N,N-dimethylacetamide with 0.5 wt % LiBr using poly(methyl methacrylate) (PMMA) standards.