TY - JOUR
T1 - Properties of polyamide 612/poly(vinyl alcohol) blends and their impact on free volume and oxygen barrier properties
AU - Li, Hong bo
AU - Wu, Jia wei
AU - Huang, Ya qiong
AU - Runt, James
AU - Huang, C. M.
AU - Huang, K. S.
AU - Yeh, Jen taut
N1 - Funding Information:
Acknowledgements The authors would like to express their appreciation to Ministry of Science and Technology, Taiwan (MOST104-2221-E-168 - 018 -MY3) for support of this work. JR would like to thank the NSF Polymers Program for support through DMR-1505953.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Oxygen transmission rates and free volume properties (i.e. average volumes of free-volume-cavities (Vf), mean number of the free volume cavities per unit volume (I3) and fractional free volume (Fv)) values of bio-based polyamide 612 (PA612)/poly(vinyl alcohol) (PVA) (i.e. PA612xPVA03 y, PA612xPVA05 y, PA612xPVA08 y and PA612xPVA14 y) blend films were reduced to a minimum value, when their PVA content reached corresponding optimal values of 25, 20, 15 and 10 wt%, respectively. The minimum oxygen transmission rate, Vf, I3 and Fv value obtained for the best PA61290PVA14 10, PA61285PVA08 15, PA61280PVA05 20 and PA61275PVA03 25 bio-based blown films reduced considerably with decreasing PVA degrees of polymerization. As evidenced by the results of dynamical mechanical analysis, differential scanning calorimetry, wide angle X-ray diffraction and Fourier transform infrared spectroscopic experiments, PA612 and PVA are miscible to some extent at the molecular level when their PVA contents are ≤ the corresponding optimal values. The significantly improved oxygen barrier and free volume properties for the PA612xPVAz y blend films with optimized compositions is at least in part to the enhanced intermolecular interactions between PA612 carbonyl groups and PVA hydroxyl groups.
AB - Oxygen transmission rates and free volume properties (i.e. average volumes of free-volume-cavities (Vf), mean number of the free volume cavities per unit volume (I3) and fractional free volume (Fv)) values of bio-based polyamide 612 (PA612)/poly(vinyl alcohol) (PVA) (i.e. PA612xPVA03 y, PA612xPVA05 y, PA612xPVA08 y and PA612xPVA14 y) blend films were reduced to a minimum value, when their PVA content reached corresponding optimal values of 25, 20, 15 and 10 wt%, respectively. The minimum oxygen transmission rate, Vf, I3 and Fv value obtained for the best PA61290PVA14 10, PA61285PVA08 15, PA61280PVA05 20 and PA61275PVA03 25 bio-based blown films reduced considerably with decreasing PVA degrees of polymerization. As evidenced by the results of dynamical mechanical analysis, differential scanning calorimetry, wide angle X-ray diffraction and Fourier transform infrared spectroscopic experiments, PA612 and PVA are miscible to some extent at the molecular level when their PVA contents are ≤ the corresponding optimal values. The significantly improved oxygen barrier and free volume properties for the PA612xPVAz y blend films with optimized compositions is at least in part to the enhanced intermolecular interactions between PA612 carbonyl groups and PVA hydroxyl groups.
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U2 - 10.1007/s10965-018-1587-2
DO - 10.1007/s10965-018-1587-2
M3 - Article
AN - SCOPUS:85051662872
SN - 1022-9760
VL - 25
JO - Journal of Polymer Research
JF - Journal of Polymer Research
IS - 9
M1 - 195
ER -