. 2017 Mar 30;10(4):365. doi: 10.3390/ma10040365

Table 4.

The predicted reductions in modulus of WPC_NT and WPC₂₀₀ at various reference temperatures.

Code	Reference Temperature (°C)	S₀ (GPa⁻¹)	a	b	R²	S(t) (GPa⁻¹)				ICR (%)
						Time (Years)				Time (Years)
						1	10	20	30	1	10	20	30
WPC_NT	20	0.81	0.18	0.21	0.987	1.11	1.30	1.38	1.43	-	-	-	-
	25	0.79	0.30	0.18	0.992	1.26	1.50	1.59	1.66	-	-	-	-
	30	0.77	0.44	0.17	0.996	1.44	1.76	1.89	1.97	-	-	-	-
	35	0.75	0.62	0.16	0.998	1.67	2.08	2.24	2.34	-	-	-	-
	40	0.74	0.85	0.16	0.998	2.00	2.57	2.78	2.92	-	-	-	-
WPC₂₀₀	20	0.51	0.25	0.12	0.994	0.85	0.95	0.99	1.02	24	27	28	29
	25	0.50	0.33	0.12	0.996	0.94	1.09	1.14	1.17	25	28	29	29
	30	0.51	0.40	0.12	0.998	1.05	1.22	1.28	1.32	27	31	32	33
	35	0.50	0.51	0.12	0.998	1.19	1.41	1.48	1.53	29	33	34	34
	40	0.50	0.64	0.12	0.999	1.36	1.64	1.74	1.80	32	36	38	38

S(t) = S₀ + at^b, where S(t) is the time-dependent compliance value, S₀ is the instantaneous elastic compliance value, and a and b are constant numbers.