文献类型：期刊文献

英文题名：Combining Renewable Gum Rosin and Lignin: Towards Hydrophobic Polymer Composites by Controlled Polymerization

作者：Wang, Jifu[1,2,3] Ya, Kejian[1,2] Korich, Andrew L.[4] Li, Shigeng[5] Ma, Shuguo[5] Ploehn, Harry J.[5] Iovine, Peter M.[4] Wang, Chunpeng[3] Chu, Fuxiang[3] Tang, Chuanbing[1,2]

第一作者：Wang, Jifu

通信作者：Tang, CB[1]

机构：[1]Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA;[2]Univ S Carolina, Nanoctr, Columbia, SC 29208 USA;[3]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Peoples R China;[4]Univ San Diego, Dept Chem & Biochem, San Diego, CA 92110 USA;[5]Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

年份：2011

卷号：49

期号：17

起止页码：3728-3738

外文期刊名：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

收录：;EI(收录号：20113114198477);Scopus(收录号：2-s2.0-79960870580);WOS:【SCI-EXPANDED(收录号:WOS:000294383400007)】；

基金：The authors acknowledge the support from Forestry Public Sector Research Fund of State Forestry Administration of China (grant number 200804011) and Special Fund for Fundamental Research from Research Institute of New technology of Chinese Academy of Forestry (CAFINT2010C05 and CAFYBB2010003) and the University of South Carolina (Start-up Fund to CT.).

语种：英文

外文关键词：atom transfer radical polymerization (ATRP); composites; hydrophobicity; lignin; renewable resources; rosin

摘要：Rosin polymer-grafted lignin composites were prepared via "grafting from" atom transfer radical polymerization (ATRP) with the aid of 2-bromoisobutyryl ester-modified lignin as macroinitiators. Three different monomers derived from dehydroabietic acid (DA) were used for execution of grafting from ATRP, while DA was separately attached onto lignin by a simple esterification reaction. Kinetic studies indicated controlled and "living" characteristics of all monomer polymerizations. Thermal studies indicated that rosin polymer-grafted lignin composites exhibited glass transition temperatures in a broad temperature range from similar to 20 to 100 degrees C. The grafting of both DA and rosin polymers significantly enhanced hydrophobicity of lignin. Static contact angle measurement of water droplets showed similar to 90 degrees for all these rosin modified lignin composites. X-ray photoelectron spectroscopy demonstrated that the surface of rosin-lignin composites was dominated with chemical compositions originating from the hydrocarbon rich rosin moiety. The impartation of hydrophobicity of rosin into lignin provided excellent water resistance of this class of renewable polymers, as all rosin-modified lignin composites showed water uptake below 1.0 wt %. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 3728-3738, 2011