Table 3. Parameters Derived from Fitting the Experimental Curves with Gaussian and Non-Gaussian/8-Chain Models: the Yield Stress Y, Strain-Hardening Modulus Gn, Network Stretch Limit λMax, and the Effective Cross-Link Density, Ne.
| Gaussian
model (eq 9)a |
non-Gaussian/8-chain model (eq 10)b |
|||||
|---|---|---|---|---|---|---|
| Y (MPa) | Gn (MPa) | Y (MPa) | λmax = n1/2 | Gn (MPa) | Ne = Gn/kT (×10–26 m–3) | |
| HDPE 6 | 41.4 | 2.17 | 39.0 | 2.98 | 2.68 | 6.5 |
| UHMWPE 5 | 36.8 | 4.43 | 34.3 | 2.84 | 4.45 | 10.8 |
| UHMWPE 9 | 34.3 | 6.00 | 31.7 | 2.58 | 5.41 | 13.1 |
a
Fitting range: e = 0.35–0.72, (λ2 – 1/λ2 = 1.5 – 4).
b
Fitting range: e = 0.35–1.40, (λ2 – 1/λ2 = 1.5 – 16).