TY - JOUR ID - 15289 TI - Relationship between the Microstructure and Gas Transport Properties of Polyurethane/Polycaprolactone Blends JO - Iranian Journal of Chemical Engineering(IJChE) JA - IJCHE LA - en SN - 1735-5397 AU - Shahzamani, Mahnaz AU - Ebrahimi, Nadereh Golshan AU - Sadeghi, Morteza AU - mostafavi, Fatemeh AD - faculty of polymer engineering , chemical engineering department, Tarbiat modares university AD - Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-114, Tehran, Iran AD - Department of Chemical Engineering, Isfahan University of Technology, P.O. Box: 84156-83111, Isfahan, Iran AD - . Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-114, Tehran, Iran Y1 - 2016 PY - 2016 VL - 13 IS - 3 SP - 78 EP - 88 KW - Polyurethane/polycaprolactone KW - Polymer Blend KW - Microstructure KW - Gas transport property DO - N2 - In this study, the relation between the permeation properties and structural characteristics of thermoplastic polyurethane based on polycaprolactone diol, TPU(PCL), and polycaprolactone (PCL) blends is investigated. for the purpsoes of this study, PU, PCL, and TPU/PCL blends containing 20 wt.% and 40 wt.% PCL were prepared via a solution blending method. The miscibility and good distribution of PCL in the soft segment of PU were represented by the reduced intensity of the band attributed to the NH band at 3400 cm-1 in the Fourier transform infrared (FTIR) spectra. X-ray diffratcion (XRD) results indicated that the amorphous structure of TPU changed to a crystalline one when PCL was added. These results were further confirmed by FTIR and differential scanning calorimetry (DSC) analyses. The permeability of CO2, O2, N2, and CH4 gases at different feed pressures ranging from 12 to 16 bar were determined. A reduction in gas permeability due to the increase in PCL content was observed in the blends. However, gas selectivity did not change with addition of PCL. UR - https://www.ijche.com/article_15289.html L1 - https://www.ijche.com/article_15289_d977e4ebbb15958b4b9e56c5759b5807.pdf ER -