Shape-Symmetry Incommensurate Polymer Crystals

报告题目:Shape-Symmetry Incommensurate Polymer Crystals

报告人:Christopher Y. LiDepartment of Materials Science and Engineering, Drexel University, United States

报告时间:20190622日(周六)上午09:30
报告地点:独墅湖校区912号楼1009报告厅

  

报告摘要:

Crystallization is ubiquitous in nature and semicrystalline polymers are of crucial importance in our daily life. Because of their long chain nature, polymers crystallize via a more complex pathway, leading to profound metastable states and morphology.This talk will focus on polymer crystals whose shape is incommensurate with three-dimensional translational symmetry. Examples are helix, tubes and spheres. Not only can this shape-symmetry incommensurateness arise from the intrinsic characteristics of the crystal such as unbalanced chain folding and/or local stress, it also can be imparted by nanoscale confinement. Both cases will be discussed, and emphasis will be given to the formation mechanism, associated properties and possible applications of these unique polymer single crystals.

  

Christopher Y. Li(李育人)教授简介

Christopher Y. Li教授主要从事高分子物理和材料方面的研究,目前为美国Drexel University终身教授,美国物理学会会士(American Physical Society Fellow)。1991-1995,中国科技大学,本科;1995-1999,美国阿克伦大学(The University of Akron)高分子科学与工程系,博士;2000-2001,阿克伦大学高分子科学与工程系博士后研究员;2002-2007Drexel University材料科学与工程系助理教授(Assistant Professor);2007-2011Drexel University材料科学与工程系副教授(Associate Professor);2011-迄今,Drexel University材料科学与工程系教授。在顶级国际期刊Nat. Mater., Nat. Nanotechnol., J. Am. Chem. Soc., Adv. Mater., Phys. Rev. Lett., Macromolecules等杂志发表学术论文120多篇,参与撰写专著15,文章被引用次数超过3000次,H因子35。获各种奖励21项。为NatureNature Materials等杂志审稿人,受邀举办学术讲座110余次。其工作被NSF, the Royal Chemical Society, American Chemical Society, ASM International, Physical Review Focus等杂志或媒体报道。于2003年获得美国的NSF-CAREER Award2006年获得中国的海外杰青,2011年获得NSF Special Creativity Award2012年当选为美国物理学会会士,2014年当选为北美热分析学会会士,2016获得Inaugural Provost’s Award for Outstanding Mid-Career Scholarly Achievement

  

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