Modification of Poly(ether ether ketone) Polymer for Fuel Cell Application

Table 3

Element % in P-PEEK ester by EDAX.

Element	Calculated wt%	Measured wt%
		P-PEEK ester
		5 m	10 m	15 m	20 m
C	68.49	65.94	67.34	70.41	72.01
O	23.82	13.69	15.06	18.46	19.93
P	7.69	1.73	2.98	4.15	6.02
Br	—	18.46	13.86	6.07	0.82
Ni	—	0.18	0.76	0.91	1.22