Premium
The Effect of glycerol on the crystalline, thermal, and tensile properties of CaCl 2 ‐doped starch/ PVA films
Author(s) -
Jiang Xiancai,
Luo Yong,
Hou Linxi,
Zhao Yulai
Publication year - 2016
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23517
Subject(s) - crystallinity , starch , glycerol , materials science , ultimate tensile strength , vinyl alcohol , thermogravimetric analysis , chemical engineering , thermal stability , polyvinyl alcohol , composite material , nuclear chemistry , polymer chemistry , chemistry , organic chemistry , polymer , engineering
Starch/poly(vinyl alcohol) (PVA) films with the addition of 10 wt% CaCl 2 and various content of glycerol were prepared. The effect of glycerol on the crystalline, thermal, and tensile properties of CaCl 2 ‐doped starch/PVA films was studied by X‐ray diffraction, thermogravimetric analysis (TGA), and tensile testing, respectively. The effect of glycerol on the miscibility of CaCl 2 ‐doped starch/PVA films was studied by scanning electron microscopy. The CaCl 2 ‐doped starch/PVA film became more homogeneous after the addition of glycerol. The addition of glycerol would increase the crystallinity of CaCl 2 ‐doped starch/PVA film. With the addition of 10 wt% glycerol and 10 wt% CaCl 2 , the starch/PVA film showed the highest degree of crystallinity. The TGA results show that the thermal stability of CaCl 2 ‐doped starch/PVA film increased after the addition of glycerol. The toughness of CaCl 2 ‐doped starch/PVA films was enhanced with the addition of glycerol. The starch/PVA film with the addition of 10 wt% CaCl 2 and 20 wt% glycerol showed the tensile strength of 17 MPa and the elongation at break of 428%. Moreover, the water sorption of CaCl 2 ‐doped starch/PVA film decreased after the addition of glycerol at the low and intermediate relative humidity of 33 and 54%. POLYM. COMPOS., 37:3191–3199, 2016. © 2015 Society of Plastics Engineers