Methylethyl ketone, solubility

Characterization of polymers 5-9 was achieved by XH and 31P NMR spectroscopy, gel permeation chromatography, differential scanning calorimetry, UV/visible and infrared spectroscopy, and elemental microanalysis. All the polymers were soluble in common organic media, such as tetrahydrofuran, acetone, and methylethyl ketone. 

Symmetric SBS block copolymers covering a wide range of compositions and molecular weights have been synthetized and studied by the same techniques as symmetric BSB copolymers In solution in methylethyl ketone, methyl methacrylate, vinyl acetate, or styrene they exhibit a behaviour similar to that of SB and BSB copolymers with respect to the effect of temperature, concentration, and postpolymerization of the solvent. The effect of the molecular weight of the soluble and insoluble blocks on the geometrical parameters of the hex onal and lamellar structures is however different for BSB and SBS copolymers. For SBS copolynKrs, there is a reciprocal interaction between soluble and insoluble blocks. 

Properties Off-white, crystalline powder. Mp 129-130C, bp 225C (10 mm Hg). Insoluble in water soluble in methylethyl ketone, methyl methacrylate. 

HNS is soluble in dimethyl formamide and slightly soluble in hot acetone, methylethyl ketone, and glacial acetic acid. HNS is used as a heat resistant booster explosive and has excellent properties for use in PBXs and mild detonating fuse end couplers and end boosters. 

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