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演講快訊
Control of Nanostructured Morphology of Poly(L-lactide) in Multiphase Polymer Systems
[2018/04/20]
教務
Control of Nanostructured Morphology of Poly(L-lactide) in Multiphase Polymer Systems

時間

 201804 20 () 3:10 PM    主持人:吳逸謨 教授

                                                發佈人:陳菊英 助教

講者

 Dr. E. Bhoje Gowd

 

服務單位

 CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)

 

講題

 Control of Nanostructured Morphology of Poly(L-lactide) in Multiphase Polymer Systems

 

地點

 創意講堂

 

語言

 English

 

摘要

          The introduction of crystallizable blocks in block copolymers control the solid statestructure and generate fascinating morphologies due to the complex interplay betweenmicrophase separation and crystallization. In the first part of the talk, the structuralevolution of poly(ʟ-lactide) (PLLA) during heating of the amorphous ABA triblockcopolymers will be discussed. For that purpose, two triblock ABA copolymers poly(ʟlactide-b-dimethylsiloxane-b-ʟ-lactide) (PLLA-b-PDMS-b-PLLA) and poly(ʟ-lactide-bethyleneglycol-b-ʟ-lactide) (PLLA-b-PEG-b-PLLA) containing poly(ʟ-lactide) weresynthesized. Upon heating of the glassy triblock copolymers, the amorphous PLLAtransiently transformed to the mesophase just above the Tg of PLLA block beforecrystallizing into the regular form.[1-2] The formation of the mesophase was clearlyfaster in miscible triblock copolymers due to the enhanced molecular mobility of theamorphous PLLA. In the second part of the talk, the role of morphology and thepolymer chain packing on the solid state emission properties of the star-shaped PLLAwill be discussed.

       Last part of the talk highlights the structure and morphology (superstructure) of thesolvent-induced crystallized PLLA films in different length scales using wide-angle andsmall-angle X-ray scattering, atomic force microscopy, and polarized lightmicroscopy.[4,5] In addition, mechanism of co-crystal formation of PLLA with solventsand solvent desorption process from the co-crystals during heating will be discussed.

 

學經歷

Education

1999-2005 Ph.D. in Chemistry, University of Pune

1994-1997 M.Sc. in Polymer Science & Technology, Sri Krishnadevaraya University

1991-1994 B.Sc. in Chemistry, Physics and Mathematics, Sri Krishnadevaraya University 

Professional Experience

Dec2011-Present Senior Scientist, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)

Mar 2014-May2014 Visiting Scientist, Stony Brook University, USA

Aug 2010-Aug2015 Ramanujan Fellow, CSIR-NIIST, India

Nov2009-July2010 Centenary Fellow, Indian Institute of Science, India

Aug2005-Oct2007 Post-Doctoral Fellow, Toyota Technological Institute, Japan

 


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