-Abdulkhani A., Mirshokraie S.A., Hamzeh Y., Hejazi S. and Nouri A., 2011. Elucidation of chemical structure of wood lignin by dissolving in 1-butyl-3-methylimidazolium chloride ionic liquid. Iran J Polym Sci Technol (Persian) 24(4): 279-289.
-Adler, E. and Hernestam, S., 1995. Estimation of phenolic hydroxyl groups in lignin. I. Periodate oxidation of guaiacol compounds. Analytica Chimica Acta, 9 (2): 319-334.
-Andes, M.V., 2008. Lignin separation from kraft black liquors by tangential ultrafiltration. La Chimica e I’Industria, 06(1): 88-95.
-Braunecker, W.A. and Matyjaszewski, K., 2007. “Controlled/living radical polymerization: Features, developments, and perspectives. Progress in Polymer Science, 32(1): 93–146.
-Chen, C.L., Dence, C. and Lin, S., 1992. Methods in Lignin Chemistry. Springer-Verlag, Germany, 578p.
-Diao, B., Zhang, Z., Zhu, J. and Li, J., 2014. Biomass-based thermogelling copolymers consisting of lignin and grafted poly (n-isopropylacrylamide), poly (ethylene glycol), and poly(propylene glycol). RSC Advances, 4(81): 42996–43003.
-Hill, C.A.S., 2007. Various technical lignins. Industrial Crops and Products, 26(2): 116–124.
-Kim, Y.S. and Kadla, J.F., 2010 .Preparation of a thermoresponsive lignin-based biomaterial through atom transfer radical polymerization. Biomacromolecules, 11 (4): 981–988.
-Liu, X., Yin, H., Zhang, Z., Diao, B. and Li, J., 2015. Functionalization of lignin through ATRP grafting of poly(2-dimethylaminoethyl methacrylate) for gene delivery. Colloids and Surfaces B: Biointerfaces, 125(1): 230–237.
-Lu, F., Ralph, J., 2010. Chapter 6- lignin. In: Cereal Straw as a Resource for Sustainable Biomaterials and Biofuels. Amsterdam: Elsevier; pp. 169–207.
-Mansouri, N. and Salvadó J., 2007. Analytical methods for determining functional groups in various technical lignins. Industrial Crops and Products, 26(2): 116-124.
-Mansson, P., 1983. Quantitative determination of phenolic and total hydroxyl groups in lignins. Holzforschung, 37(3): 143-146.
-Matyjaszewski, K. and Xia, J., 2001. Atom transfer radical polymerization. Chemical Reviews, 101(9): 2921–2990.
-Meister J.J., 1991. Addition polymerization of acrylamide, acrylic acid, 2-methoxy ethyl ester and lignin. US3200098.
-Mirshokraie S.A., Larie J., Mostaghni F., Abdulkhani A., 2014. Analysis of photodegraded lignin and lignin model compounds by ATR-FTIR spectroscopy, Iranian Journal of Wood and Paper Science Research (Persian) 29(3): 343-353.
-Mirshokraie S.A., Abdulkhani A. and Karimi A., 2008. Chemical structure elucidation of milled wood lignin and cellulytic lignin from Poplar. Iranian Journal of Wood and Paper Science Research (Persian) 23(2): 102-122.
-Pourmahdi M., 2015. Synthesis of Lignin/Acrylamide Graft Copolymer by Redox Radical Polymerization for Use in the Water-Based Drilling Fluid, MSc Thesis, Tarbiat Modares University, Tehran, Iran.
-Teodorescu, M. and Matyjaszewski, K., 1999 .Atom transfer radical polymerization of (meth) acrylamides. Macromolecules, 32 (15): 4826–4831.
-Thring, R.W., Chornet, E. and Overend, R.P., 1990. Recovery of a solvolytic lignin: effects of spent liquor/acid volume ratio, acid concentration and temperature. Biomass, 23(4): 289–305.
-Zakis, G., 1994. Functional Analysis of Lignins and Their Derivatives. Tappi, USA, 102 p.
-Zeisel, S., 1885. Über ein ve rfahren zum quantitative nachweis von methoxyl. Monatshefte für Chemie, 6(1): 989-996.
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