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FTIR and thermal analyses of intermolecular interactions in poly(trimethylene terephthalate)/phenoxy blends
Author(s) -
FarmahiniFarahani Madjid,
Jafari SeyedHassan,
Khonakdar Hosein Ali,
Yavari Ahmad,
Melati Amir
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21839
Subject(s) - materials science , fourier transform infrared spectroscopy , melting point depression , miscibility , intermolecular force , hydrogen bond , polymer blend , melting point , flory–huggins solution theory , polymer chemistry , scanning electron microscope , composite material , chemical engineering , polymer , molecule , organic chemistry , copolymer , chemistry , engineering
Intermolecular interactions in the blends of poly(trimethylene terephthalate)/phenoxy resin of bisphenol A prepared by melt mixing in a microcompounder were studied using Fourier transform infrared (FTIR) spectroscopy and thermal analysis. The FTIR results revealed the characteristic bands of the blend constituents along with the bands showing interassociated, self‐associated, and nonassociated hydrogen bonding in the blends. It was found that the self‐associated hydrogen bonds in the blends were favorable over the interassociated bonds. On the other hand, using the melting point depression, the interaction parameter of the blends was calculated to be about 0.047. The positive value of the interaction parameter and low degree of interassociated hydrogen bonding in the blends suggest the immiscibility of the blends, which is confirmed by scanning electron microscopy observations as well as dynamic mechanical analysis. However, for chemically reacted compositions, the blends were changed to homogenous systems. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers