STUDY ON THE SYNTHESIS AND COMPOSITION OF POLYNITROALCOHOLS PREPARED FROM BUTADIENE-STYRENE NITROOLIGOMER AND FORMALDEHYDE

Oligomeric polynitroalcohols (PNA) containing 1.9-3.6% hydroxyl groups were prepared by reacting butadiene-styrene nitrooligomer (BSNO) with formaldehyde at 40 degrees C for 5 h. The BSNO/formaldehyde mass rati o was 2:1 and the reaction was conducted in the presence of alkaline c atalyst. A quantitative determination of the functional groups content and the fragmentary composition of PNA obtained were carried out by u sing IR spectroscopy (baseline internal standard techniques), elementa l analysis and liquid adsorption chromatography. To this purpose, one of the polynitroalcohols prepared was fractionated by a liquid adsorpt ion chromatography on silica and the fractions obtained were character ized by elemental analysis and IR spectroscopy. The specific character of the condensation reaction was also discussed. PNA are considered t o serve as starting materials for the preparation of polynitrourethane s. (C) 1998 Elsevier Science Ltd. All rights reserved.