Lignin preparations were obtained from harsh flax fiber and material exposed to an alkaline solution of sodium borohydride using the Bjerkman extraction method. Peaks of individual vibrations of all types of covalent bonds in the functional groups of the biopolymer were identified. The mechanism of lignin destruction induced by destabilization of the ether bond adjacent to the carbonyl being reduced in the propane link of the macromolecule was confirmed. Reduction of the carbonyl was accompanied by a doubling of the intensity of the absorption band of alkyl hydroxyls and a fourfold increase in the number of hydroxyaryl groups, which was indicative of the accumulation of structural units in the free phenolic form in the system. The dynamics of structural transformations were compared. The duration of serial-parallel processes of polymer reduction and destruction was estimated.

木质素制剂是使用Bjerkman提取法从粗糙的亚麻纤维和暴露于硼氢化钠碱性溶液的材料获得的。确定了生物聚合物官能团中所有类型共价键的单个振动的峰值。证实了由于大分子的丙烷键中与羰基相邻的醚键失稳引起的木质素破坏机理。羰基的还原伴随着烷基羟基吸收带强度的加倍和羟基芳基基团数量的四倍增加，这表明体系中游离酚形式的结构单元的积累。比较了结构转变的动力学。