A DSC study of poly(styrene-co-acrylonitrile) and poly(vinyl chloride-co-vinyl acetate) blends produced using different blending techniques
TL;DR: In this paper, the compatibility of poly(styrene-co-acrylonitrile) (SAN) and poly(vinyl chloride-covinyl acetate) (VYHH) blends using several blending techniques such as melt-mixing, solution blending and co-precipitation methods by an appropriate non-solvent were performed.
About: This article is published in European Polymer Journal.The article was published on 1996-02-01. It has received 9 citations till now. The article focuses on the topics: Vinyl acetate & Differential scanning calorimetry.
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TL;DR: In this paper, the in situ grafting-from approach via atom transfer radical polymerization was successfully applied to polystyrene, poly(styrene-co-acrylonitrile), and polyacrylanitrile grafted onto the convex surfaces of multiwalled carbon nanotubes (MWCNTs) with (2-hydroxyethyl 2-bromoisobyrate) as an initiator.
Abstract: The in situ grafting-from approach via atom transfer radical polymerization was successfully applied to polystyrene, poly(styrene-co-acrylonitrile), and polyacrylonitrile grafted onto the convex surfaces of multiwalled carbon nanotubes (MWCNTs) with (2-hydroxyethyl 2-bromoisobutyrate) as an initiator. Thermogravimetric analysis showed that effective functionalization was achieved with the grafting approach. The grafted polymers on the MWCNT surface were characterized and confirmed with Fourier transform infrared spectroscopy and nuclear magnetic resonance. Raman and near-infrared spectroscopy revealed that the grafting of polystyrene, poly(styrene-co-acrylonitrile), and polyacrylonitrile slightly affected the sidewall structures. Field emission scanning electron microscopy showed that the carbon nanotube surface became rough because of the grafting of the polymers. Differential scanning calorimetry results indicated that the polymers grafted onto MWCNTs showed higher glass-transition temperatures. The polymer-grafted MWCNTs exhibited relatively good dispersibility in an organic solvent such as tetrahydrofuran.
106 citations
TL;DR: In this paper, poly(vinyl butyral) (PVB) was introduced as the second polymer component to hydrophilized PVC ultrafiltration membranes, and the results showed that the PVC/PVB blended system was partially miscible at a certain proportion range.
73 citations
TL;DR: In this paper, the authors investigated the miscibility or complexation of poly(styrene-co-acrylic acid) containing 27 mol % of acrylic acid (SAA-27) and poly(n-dimethylacrylamide (SAD-17, SAD-32) or poly(N,N-dimethylamide) (PDMA) were investigated by different techniques.
Abstract: The miscibility or complexation of poly(styrene-co-acrylic acid) containing 27 mol % of acrylic acid (SAA-27) and poly(styrene-co-N,N-dimethylacrylamide) containing 17 or 32 mol % of N,N-dimethylacrylamide (SAD-17, SAD-32) or poly(N,N-dimethylacrylamide) (PDMA) were investigated by different techniques. The differential scanning calorimetry (DSC) analysis showed that a single glass-transition temperature was observed for all the mixtures prepared from tetrahydrofuran (THF) or butan-2-one. This is an evidence of their miscibility or complexation over the entire composition range. As the content of the basic constituent increases as within SAA-27/SAD-32 and SAA-27/PDMA, higher number of specific interpolymer interactins occurred and led to the formation of interpolymer complexes in butan-2-one. The qualitative Fourier transform infrared (FTIR) spectroscopy study carried out for SAA-27/SAD-17 blends revealed that hydrogen bonding occurred between the hydroxyl groups of SAA-27 and the carbonyl amide of SAD-17. Quantitative analysis carried out in the 160–210°C temperature range for the SAA-27 copolymer and its blends of different ratios using the Painter–Coleman association model led to the estimation of the equilibrium constants K2, KA and the enthalpies of hydrogen bond formation. These blends are miscible even at 180°C as confirmed from the negative values of the total free energy of mixing ΔGM over the entire blend composition. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1011–1024, 2007
24 citations
TL;DR: In this paper, the thermal behavior of binary mixtures of poly(styrene-co -methacrylic acid) containing 12 or 29.5 µmol.% of 4-vinylpyridine (IBM4VP-20) as blends or interpolymer complexes were investigated by differential scanning calorimetry, thermogravimetry and FTIR spectroscopy.
19 citations
References
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TL;DR: In this article, the Gordon-Taylor equation was used to predict the Tg-composition dependence with a K parameter equal to 0,5 and 1,25 for poly(vinyl butyral) and poly(N-vinyl-2-pyrrolidone) blends, respectively.
Abstract: Blends of poly(vinyl butyral) (PVB) and of a copolymer of bisphenol A and epichlorohydrin (Phenoxy) with poly(N-vinyl-2-pyrrolidone) (PVP) were prepared by solution casting. The glass transition temperatures Tg for different compositions of the blends were measured by differential scanning calorimetry (DSC). The Tg behaviour of PVB/PVP blends suggests the existence of a single phase for blends containing less than 50 wt.-% PVP, and of two phases in blends containing more than 50 wt.-% PVP. Phenoxy/PVP blends showed to be miscible over the entire composition range. It was found that the Gordon-Taylor equation predicts adequately the Tg-composition dependence with a K parameter equal to 0,5 and 1,25 for PVB/PVP and Phenoxy/PVP blends, respectively.
40 citations
TL;DR: In this article, the compatibility of blends prepared from random copolymers of p-fluorostyrene and o-fluorsyrene with poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and with polystyrene (PS) has been examined using differential scanning calorimetry.
34 citations
TL;DR: Bisphenol A polycarbonate is shown to be miscible with a vinylidene chloride-based polymer containing 13.5% by weight of vinyl chloride as mentioned in this paper, and poly(vinyl chloride), poly (vinylidene fluoride), and polyepichlorohydrin.
Abstract: Bisphenol A polycarbonate is shown to be miscible with a vinylidene chloride based polymer containing 13.5% by weight of vinyl chloride. On the other hand, polycarbonate is found to be immiscible with poly(vinyl chloride), poly(vinylidene fluoride), and polyepichlorohydrin.
25 citations
Journal Article•
TL;DR: Les melanges prepare par coulee de solutions dans le chloroforme and la cyclohexanone sont miscibles pour toutes compositions a temperature ambiante and montrent un comportement LCST par chauffage as mentioned in this paper.
Abstract: Les melanges prepares par coulee de solutions dans le chloroforme et la cyclohexanone sont miscibles pour toutes compositions a temperature ambiante et montrent un comportement LCST par chauffage. Les melanges prepares par coulee de solutions dans le THF ou par melangeage a l'etat fondu presentent une separation de phase. La miscibilite du PMMA avec le PVAc est attribuee a des effets entropiques
18 citations