Self-Healing Polyurethane-Based Nanocomposites Modified with Carbon Fibres and Carbon Nanotubes

Table 3

Comparison of healing effects of different samples and increases in strengths of damaged samples after C/H cycles.

Name/type of sample	Healing after I C/H cycle (%)	Healing after II C/H cycle (%)	Healing after III C/H cycle (%)	Increase in strength (MPa)
				After I C/H	After II C/H	After III C/H
PU40_CNT0_CF0	98,3	95,6	92,5	2,54	2,33	2,09
PU40_CNT2_CF0	93,3	83,4	77,2	4,80	3,46	2,95
PU40_CNT2_CF3	71,7	71,2	67,2	2,76	2,64	1,8
PU50_CNT0_CF0	96,5	92,5	93,3	2,34	2,31	2,36
PU50_CNT2_CF0	83,3	74,5	74,6	3,94	2,87	2,91
PU50_CNT2_CF3	66,5	66,2	61,5	2,54	2,45	1,67