Lignin graft copolymerization of acrylic monomer -2

Lignin graft copolymerization of acrylic monomer -2 Chemistry – induced hydrolysis Until recently only been reported , mostly using a phenolic peroxidase (phenoloxidase), mainly laccase in the presence of peroxidase , lignin itself radical polymerization mechanism may be lignin hydrolysis radicals and long chain radicals with acrylic acid ( the formula ) , formed with […]

Lignin graft copolymerization of acrylic monomer -1

Lignin graft copolymerization of acrylic monomer -1 Lignin monomer vinyl radical graft copolymerization , the most studied is the reaction of lignin and acrylamide because these monomers acrylamide maximum activity , the use of a cerium salt initiator , H2O22Fe (Ⅱ ) , potassium permanganate , persulfate , and γ2 rays. 0.001mol/LNaOH dissolved lignin solution […]

Lignin and styrene graft copolymer

Lignin and styrene graft copolymer Benzene extraction of lignin using the grafting reaction with styrene , the test procedure is as follows : the pure styrene ( Sample A) was added to the conical flask, and passed N2 10min, lignin , CaCl2 , and dimethylsulfoxide (DMSO ) ( sample B) was added to another Erlenmeyer […]

Lignin polymerization of epoxy compound -2

Lignin polymerization of epoxy compound -2   Shirai shiN, also try after chemical modification of lignin synthesis – epoxy adhesive. In order to improve the reactivity of lignin, the alkali lignin phenol first with bisphenol A, phenol process, adding a small amount of hydrochloric acid or BF3 catalyst. Bisphenol A phenol-modified material in order to […]

Lignin polymerization of epoxy compound -1

Lignin polymerization of epoxy compound -1 Early epoxy lignin had been reported in 1962, they are prepared by mixing 100 parts of lignin, 140 parts of phenol and three sulfuric acid, heated to 140 ~ 180 ℃, after a period of reaction, the residual phenol by vacuum distillation and distilled water removal, leaving lignin phenol […]

Lignin polyurethane

Lignin polyurethane 1962 has begun with phenol and lignin reaction of isocyanates. These pioneering work laid the lignin in the plastics industry to use foundation. GlasserWG other special emphasis on the application of lignin as engineering plastics material, he lignin reaction with maleic anhydride copolymer, ethylene oxide and then with 1,22 reaction copolymer polyol structure, […]

Lignosulfonate phenolic resin -2

Lignosulfonate phenolic resin -2   Using the kraft pulping liquor obtained in the reaction with a phenol lignin sulfonates, with formaldehyde polymer, more suitable to obtain the production of fiber with plastic. When this gel modified with nitrobenzene, further improved toughness. In addition, the application of two-step condensation of lignin obtained very good performance particleboard […]

Lignosulfonate phenolic resin -1

Lignosulfonate phenolic resin -1   Lignin adhesives used in wood products once made by the Forintek more comprehensive review . For years, many experts have tried to develop lignin-based adhesives. Lignin extracted from sawdust, the phenol (75g) and formalin (50mL) was added to a round bottom flask equipped with a reflux condenser, the other adding […]

Lignosulfonate polymer field of application

Lignin polymer field of application Lignin and cellulose and hemicellulose constitute the main component of plant skeleton . In nature after cellulose, lignin is the second largest reserves of natural organic matter . Human use of cellulose for several thousand years of history , but has not been a lot of lignin , widespread use […]

Lignosulfonate in PVC composites Applications

Lignin in PVC composites Applications   Lignin in PVC composites Applications Lignin is nature after cellulose, the second largest amount of natural polymers. Preparation of lignin polymer composites, is abundant renewable resources that can be effectively utilized ways. Lignin and PVC and other materials prepared by blending synthetic polymer composite material, so that the two […]

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