Structural and Morphological Characterization of Micro and Nanofibers Produced by Electrospinning and Solution Blow Spinning: A Comparative Study

Table 4

Characteristic infrared bands of PLA, PEO, and PCL.

Polymer	Position (cm^−1)	Vibrational mode	Abbreviation
	2993	Asymmetrical stretching	ν as(CH2)
	2943	Symmetrical stretching	ν s(CH2)
	1755	Stretching	ν(C=O)
	1450	Asymmetrical scissoring	δ as(CH3)
PLA	1360	Symmetrical scissoring	δ s(CH3)
	1182	Asymmetrical stretching + twisting	ν as(C–O) + τ(CH3)
	1086	Symmetrical stretching	ν s(C–O–C)
	1045	Symmetrical stretching	ν s(C–CH3)
	868	Stretching	ν(C–COO)
	2946	Asymmetrical stretching	ν as(CH2)
	2886	Symmetrical stretching	ν s(CH2)
	1468	Scissoring	δ(CH2)
	1361	Wagging	ω(CH2)
	1343	Wagging	ω(CH2)
PEO	1281	Twisting	τ(CH2)
	1242	Twisting	τ(CH2)
	1150	Stretching	ν(CO)
	1110	Stretching	ν(CO)
	1062	Stretching	ν(CO)
	963	Rocking	ρ(CH2)
	843	Rocking	ρ(CH2)
	2946	Asymmetrical stretching	ν as(CH2)
	2864	Symmetryical stretching	ν s(CH2)
	1726	Stretching	ν(C=O)
PCL	1294	Stretching	ν crystalline
	1243	Asymmetryical stretching	ν as(C–O–C)
	1192	Stretching	ν(OC–O)
	1180	Symmetrical stretching	ν s(C–O–C)
	1162	Stretching	ν amorphous