. 2020 Mar 19;8(13):5360–5370. doi: 10.1021/acssuschemeng.0c00991

Table 5. FTIR Band Area (in Arbitrary Units) at 1712 and 1576 cm^–1^a.

Sample	A₁₇₁₂ [a.u.]	A₁₅₇₆ [a.u.]	A₁₅₈₁/A₁₇₁₂ [a.u.] × 10²
0%-before	18.24	0.038	0.21
0%-after	22.052	0.084	0.38
1%-before	21.47	0.039	0.18
1%-after	19.255	0.066	0.34
2.5%-before	21.253	0.035	0.16
2.5%-after	23.504	0.116	0.49
5%-before	23.87	0.04	0.17
5%-after	23.629	0.173	0.73
7.5%-before	21.123	0.037	0.18
7.5%-after	19.496	0.122	0.63
10%-before	19.921	0.047	0.24
10%-after	18.587	0.177	0.95

The 1712 cm^–1 is for C=O bond absorption due to the presence of ester, and 1576 cm^–1 is for benzene ring absorption of the aromatic ester. The percentage indicates the MCPA-PHBV oligomer concentration in the films.

Table 5. FTIR Band Area (in Arbitrary Units) at 1712 and 1576 cm–1a.

Table 5. FTIR Band Area (in Arbitrary Units) at 1712 and 1576 cm^–1^a.