Preparation of Novel Lignophenol-based Polymers using Cellulose Fibers as Vanishing Reaction-Supports

Abstract

Two syntheses of novel lignophenol (LP) derivatives via hydroxymethlylated (HM) lignophenol (p-cresol type) under conditions of the phase-separation system were carried out. First, brush-type derivatives were carried out using HM-Western Hemlock (Tsuga Heterophilla)-lignophenol (p-cresol type, HMLC1) as benzyl compounds. Resulting derivatives were obtained with high yields. Due to high reactivity and high affinity between p-cresol and HMCL1, there are no influences with or without reacting supports. Resulting LC2, LC3 and LC4 showed almost same characteristic properties as LP estimated by ¹H-NMR, TMA, GPC. Secondly, bulky alkyl phenols were also tried to apply for second grafting phenols to HM-Hinoki cypress (Chamaecyparis obtusa)-lignophenol (p-cresol type, HM-HCLC1). Without vanishing reaction-supports (pulp, freeness100), all derivatives were aggregated. On the other hand, using reaction-supports, 4-sec-buthylphenol (4SBP), 4-(1,1,3,3-tetramethyl)buthyl phenol (4TMBP) and 4-pentylphenol(4PP) generated derivatives with 47.6 %, 25.4 % and 59.4 % yields, respectively. A part of derivatives were dissolved into purification solvents such as EtOEt. Resulting derivatives were estimated by GPC, TMA and ¹H-NMR.