Dynamics of Polymer Blends with Intermolecular Hydrogen Bonding:  Broad-Band Dielectric Study of Blends of Poly(4-vinyl phenol) with Poly(vinyl acetate) and EVA70

2002 ◽  
Vol 35 (22) ◽  
pp. 8478-8487 ◽  
Author(s):  
Zhang ◽  
Paul C. Painter ◽  
James Runt
Keyword(s):  
Hydrogen Bonding ◽  
Polymer Blends ◽  
Vinyl Acetate ◽  
Broad Band ◽  
Dielectric Study ◽  
Intermolecular Hydrogen Bonding ◽  
Vinyl Phenol

On the role of intermolecular hydrogen bonding in miscible polymer blends

1984 ◽  
Vol 17 (9) ◽  
pp. 1671-1678 ◽  
Author(s):  
E. J. Moskala ◽  
S. E. Howe ◽  
Paul C. Painter ◽  
Michael M. Coleman
Keyword(s):  
Hydrogen Bonding ◽  
Polymer Blends ◽  
Intermolecular Hydrogen Bonding ◽  
Miscible Polymer Blends

Complex formation and selective hydrogen bonding in poly(4-vinylphenol-co-methyl methacrylate)- poly(N-vinylpyrrolidone-co-vinyl acetate) systems

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Isamu Akiba ◽  
Takehiro Seki ◽  
Saburo Akiyama
Keyword(s):  
Hydrogen Bonding ◽  
Glass Transition ◽  
Complex Formation ◽  
Hydrogen Bonds ◽  
Methyl Methacrylate ◽  
Polymer Blends ◽  
Carbonyl Group ◽  
Vinyl Acetate ◽  
Hydroxy Group ◽  
Glass Transition Temperatures

AbstractPoly(4-vinylphenol-co-methyl methacrylate) (P(VPh-MMA)) and poly(Nvinylpyrrolidone- co-vinyl acetate) (P(VPr-VAc)) form hydrogen bonding complexes with approx. 1:1 stoichiometry between the VPh unit of P(VPh-MMA) and the VPr unit of P(VPr-VAc) in methanol. These complexes show much higher glass transition temperatures than average polymer blends, suggesting the presence of extremely strong hydrogen bonds. FTIR measurements revealed selective hydrogen bonds between the hydroxy group of VPh units in P(VPh-MMA) and the carbonyl group of VPr units in P(VPr-VAc).

scholarly journals Exploring the Structural Chemistry of Pyrophosphoramides: N,N′,N″,N‴-Tetraisopropylpyrophosphoramide

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 149-163
Author(s):  
Duncan Micallef ◽  
Liana Vella-Zarb ◽  
Ulrich Baisch
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Hydrogen Bonding ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
X Ray

N,N′,N″,N‴-Tetraisopropylpyrophosphoramide 1 is a pyrophosphoramide with documented butyrylcholinesterase inhibition, a property shared with the more widely studied octamethylphosphoramide (Schradan). Unlike Schradan, 1 is a solid at room temperature making it one of a few known pyrophosphoramide solids. The crystal structure of 1 was determined by single-crystal X-ray diffraction and compared with that of other previously described solid pyrophosphoramides. The pyrophosphoramide discussed in this study was synthesised by reacting iso-propyl amine with pyrophosphoryl tetrachloride under anhydrous conditions. A unique supramolecular motif was observed when compared with previously published pyrophosphoramide structures having two different intermolecular hydrogen bonding synthons. Furthermore, the potential of a wider variety of supramolecular structures in which similar pyrophosphoramides can crystallise was recognised. Proton (1H) and Phosphorus 31 (31P) Nuclear Magnetic Resonance (NMR) spectroscopy, infrared (IR) spectroscopy, mass spectrometry (MS) were carried out to complete the analysis of the compound.

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