Prof. Cun-Yue Guo
University of Chinese Academy of Sciences, China
|Title: Catalytic fabrication of high-performance polyethylene|
Metal complexes with various ligands and the introduction of inorganic fillers are two predominant ways in preparing high-performancepolyethylene (PE). Firstly, several series of nickel procatalysts used for ethylene (co)polymerization will be presented herein. The bidentate nickel complexes with N-N ligands and O-P ligands afforded highly branched polyethyleneandfunctional ethylene copolymers respectively. Secondly, mesoporous molecular sieves (MMS) were introduced to support the catalyst and provide the place (nanoreactor) for ethylene polymerization. The pore sizes of MMS are suitable for ethylene polymerizations to proceed in an extrusion mode and the as-prepared polyethylene are in situ compounded with MMS particles to form polymer nanocomposites.The introduction of MMSendows the PE with increased molecular weights and molecular weight distribution, elevated strength and modulus, and good processability, etc..
Acknowledgement: This work is financially supported by the National Natural Science Foundation of China (Nos. 20774100 and 51373176) and DAAD-K. C. Wong Fellowships. CYG is grateful to Prof. Dr. Joachim W. Heinicke for the cooperation.
C.-Y. Guo, N. Peulecke,K. R. Basvani, M. K. Kindermann, J. Heinicke, 2-Phosphinophenolate nickel catalysts: Formation of ethylene copolymers with isolated sec-alkyl, aryl and functionally substituted alkyl groups, Macromolecules, 2010, 43(3), 1416-1424.
S. Kong, K. Song, T. Liang, C.-Y. Guo, W.-H. Sun, C. Redshaw, Methylene-bridged bimetallic α-diimino nickel (II) complexes: Synthesis and high efficiency in ethylene polymerization, Dalton Trans., 2013, 42(25), 9176-9187.
 X. Wang,L. Fan, Y. Yuan,S. Du,Y. Sun,G. A. Solan, C.-Y. Guo, W.-H. Sun, Raising the N-aryl fluoride content in unsymmetrical diaryliminoacenaphthylenes as a route to highly active nickel(II) catalysts in ethylene polymerization, Dalton Trans., 2016, 45(45), 18313-18323.
 Y. Zhang, C. Huang, X. Wang, Q. Mahmood, X. Hao, X. Hu, C.-Y. Guo, G. A. Solan, W.-H. Sun, Highly branched unsaturated polyethylenes achievable using strained imino-cyclopenta[b]pyridyl-nickel precatalysts, Polym. Chem., 2017, 8(6), 995-1005.
C.-Y. Guo, H. Xu, M. Zhang, H.-J. Yang, F. Yan, G. Yuan, Copolymerization of ethylene and in situ generated α-olefins to high performance LLDPE with a two-catalyst system supported on mesoporous molecular sieves, Polym. Int., 2010, 59(6), 725-732.
 C.-Y. Guo, H. Xu, M. Zhang, X. Zhang, F. Yan, G. Yuan, Immobilization of iron-based diimine complexes onto mesoporous molecular sieves and its catalytic performance in ethylene oligomerization, Catal. Commun., 2009, 10(10), 1467-1471.
 H. Xu, C.-Y. Guo, Polymerization in the confinement of molecular sieves: Facile preparation of high performance polyethylene, Eur. Polym. J., 2015, 65, 1532.  S. Chen, C.-Y. Guo, L. Liu, H. Xu, J. Dong, Y. Hu, Immobilization of zirconium complex bearing bis(phenoxyketimine) ligand on MCM-41 for ethylene polymerization, Polymer, 2005, 46(24), 11093-11098.
Dr. Guo is a Professor in the School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences (UCAS). He read chemical engineering at Taiyuan University of Technology (TUT) with a Bachelor’s degree (1985-1989) and majored in chemical engineering at TUT with a Master’s degree (1994-1997). Dr. Guo finished his Ph.D. thesis in Polymer Chemistry and Physics from the Institute of Chemistry, Chinese Academy of Sciences (ICCAS), China in 2003. He became a lecturer in Chemical Engineering at TUT in 1997. From 2003 to 2005, he joined ICCAS as an Assistant Research Professor and was promoted to an Associate Research Professor in 2006. Dr. Guo had a one-year research experience in Prof. Dr. Joachim Werner Heinicke’s laboratory at the University of Greifswald, Germany as a Visiting Professor (2007-2008). He rejoined ICCAS in 2008 before working at UCAS as Associate Professor and Full Professor (2010-). Dr. Guo's principal areas of interest and expertise include functional polymer-based composites, olefin polymerization, carbon dioxide utilization, and catalytic synthesis of biofuels. The main goal of Dr. Guo’s research programs is to develop highly efficient catalytic systems for the synthesis of high-performance materials. His recent research projects focus on the preparation of novel thermoelectric composites, UV-shielding composites, and polyolefins.
Prof. Guo is a member of American Chemical Society, Chinese Chemical Society, Chinese Chemical Engineering Society, and Chinese Materials Research Society. Dr. Guo was Lead Guest Editor (Special Issue) of International Journal of Polymer Science (2014-2015), Deputy Editor-in-Chief of the Journal of New Industrialization, Member of the Editorial Board of International Scholarly Research Notices (2011-), Member of the Editorial Board of Soft Nanoscience Letters (2011-), Member of Editorial Advisory Board of the Open Macromolecules Journal (2009-2014).
Prof. Guo has served as referees for 35 SCI journals including Macromolecules, Macromolecular Rapid Communications, Polymer, etc.. He also serves as an external reviewer of Natural Sciences and Engineering Research Council of Canada (2013), professional referee of National Natural Science Foundation of China (2003-), professional referee of China International Science and Technology Cooperation, Ministry of Science and Technology of the People’s Republic of China (2009-), and professional referee of the project sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of the People’s Republic of China (2012-).
Dr. Guo has 99 publications in peer-reviewed journals and has contributed one keynote lecture, five invited lectures and sixteen conference posters in addition to 22 issued patents. During his employment at CAS, Dr. Guo has directed 16 students in their PhD/master’s dissertation/thesis research. Honors include a DAAD-K. C. Wong Research Fellowship Award (2007) which is awarded to only 120 person-month to scientists with high professional titles from China that very year, he also is a two-time recipient of the Outstanding Award of Young Scientist from ICCAS (2001, 2002).