Modifications Caused by Enzyme-Retting and Their Effect on Composite Performance

Table 6

Pearson’s correlation between enzyme exposure, interfacial bond strength, impact strength and constituent content plus fiber characteristic measurements.

Trait	Enzyme exposure	Notched impact specific strength	Unnotched impact specific strength	Pullout	Specific ILSS	Specific tensile modulus	Specific tensile strength
Enzyme exposure	na	0.047	0.336	−0.086	0.150	0.354	0.612
Strength (g/tex)	−0.242	0.415	0.157	−0.202	0.088	−0.258	−0.200
Elongation (%)	0.321	−0.236	−0.261	0.285	0.599	−0.006	0.136
Ca (ppm)	−0.847	0.322	−0.021	−0.415	−0.251	−0.149	−0.428
Mg (ppm)	−0.741	0.377	0.205	−0.426	−0.050	0.096	−0.328
Na (ppm)	0.898	0.244	0.114	−0.045	−0.318	0.210	0.694
K (ppm)	0.861	0.452	0.270	0.006	−0.303	0.260	0.572
Fe (ppm)	−0.089	−0.412	−0.656	0.504	−0.349	−0.057	0.509
Zn (ppm)	−0.300	−0.520	0.071	−0.375	0.661	−0.342	−0.472
Wax content (%)	−0.821	−0.370	−0.283	0.347	0.317	0.353	0.066