Physicochemical and Mechanical Characterization of Raffia vinifera Pith

Table 1

Summary of mass percentages of RVP chemical elements.

Longitudinal position	Chemical elements	Radial position
		Center (R3)			Half-radius (R2)			Peripheric (R1)
		Fiber	Fiber/matrix	Matrix	Fiber	Fiber/matrix	Matrix	Fiber	Fiber/matrix	Matrix
PL-1/4	C	52.14	53.51	55.79	52.64	53.86	52.24	55.16	53.48	54.55
	O	47.65	46.13	41.02	46.98	45.46	41.65	44.51	46.52	44.15
	Si	0.21	0.36	2.16	0.38	0.67	5.53	0.33	—	0.67
	Ca	—	—	0.65	—	—	0.58	—	—	0.63
PL-2/4	C	51.12	53.42	50.76	51.46	51.48	50.41	51.73	50.07	51.78
	O	48.88	46.14	47.37	48.17	47.97	46.91	48.27	49.78	47.02
	Si	—	0.44	1.37	0.37	0.56	2.15	—	0.14	0.65
	Ca	—	—	0.49	—	—	0.53	—	—	0.55
PL-3/4	C	51.77	53.54	51.99	53.96	52.22	52.22	51.33	51.62	52.35
	O	47.81	44.42	46.25	45.51	47.78	46.80	48.67	48.00	45.91
	Si	0.42	1.39	1.10	0.52	—	0.43	—	0.39	1.19
	Ca	—	0.65	0.66	—	—	0.55	—	—	0.56
PL-4/4	C	56.30	55.16	51.79	—	53.76	53.76	52.87	53.58	54.26
	O	43.10	42.36	46.11	—	45.33	45.33	45.65	45.29	42.67
	Si	0.61	2.01	1.49	—	0.28	0.28	1.01	0.75	0.77
	Ca	—	0.47	0.61	—	0.63	0.63	0.46	0.39	0.59