Table 1.

The assignments of ¹H NMR spectrum of PEMTC.

position of proton	chemical shift (ppm)	theoretical number of proton	integral results of the peaks
a	5.80–6.57	3	2.72
b	4.21–4.53	4	3.92
j	4.12	2	2.03
c + k	3.58–3.86	5	4.97
l	3.5	2	2.29
i	2.91	2	1.97
d + h	1.15–1.44, 1.56–1.83	4	3.97
e + f+g + h+m + n	0.72–1.15	18	16.72