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Effect of intramolecular interactions on the miscibility windows of PVC blends with modified SAN copolymers
Author(s) -
Kim ChulHwan,
Park JungKi,
Hwang TaekSung
Publication year - 1996
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.10439
Subject(s) - miscibility , copolymer , acrylonitrile , materials science , intramolecular force , methacrylonitrile , polymer chemistry , intermolecular force , styrene , vinyl chloride , fourier transform infrared spectroscopy , chemical engineering , polymer , composite material , organic chemistry , molecule , chemistry , engineering
We investigated the miscibility windows in the blends of poly(vinyl chloride) (PVC) with chemically modified styrene/acrylonitrile (SAN) copolymers such as α‐methyl styrene/acrylonitrile (α SAN), α‐methyl styrene/methacrylonitrile (MSMAN). The blends of PVC with α SAN were found to have the broader miscibility window. This enhanced miscibility was interpreted in terms of intramolecular repulsion that originates from unfavorable interaction between counits of the copolymers and also intramolecular association of AN units. The intramolecular interactions were studied by using Fourier transform infrared (FT‐IR) spectroscopy. These interactions were reflected by a peak broadening in the nitrile stretching band in the acrylonitrile segments. The intermolecular interactions governing the miscibility in the blends of PVC with the series of copolymers were also discussed.