Ethylene-Vinyl Acetate Copolymer/Crude Gossypol Compositions as Pour Point Depressants for Waxy Oil

Table 2

Assignments of proton resonances in the EVAc/CG (65 : 35 wt%) composition.

Peak number	ppm	Assignments of ^1H resonances
		Crude gossypol	EVA copolymer
1	1.19 (quint)		–CH2–CH2–CH2–
2	1.41 (q)		–CH–OCOCH3–CH2–CH2–
3	1.55 (d)	(CH3)2C
4	1.76 (t)		–CH–OCOCH3–CH2–OCOCH3–
5	1.93 (s)		–OCOCH3–
6	2.16 (s)	CH3
7	3.90 (sept)	H–C(CH3)2
8	4.46 (s)
9	5.24 (quint)		–CHOCOCH3–
10	5.73 (s)	H–O1
11	6.46 (s)	H–O6
12	7.79 (s)	H–C4
13	11.13 (s)	CHO
14	15.19 (s)	H–O7