Hot Article: Multi-block copolymer stars via an iterative radical polymerization technique. No purification required!

Graphical abstract: Synthesis of multi-block copolymer stars using a simple iterative Cu(0)-mediated radical polymerization techniqueA simple and efficient route to well-defined multi-block star copolymers has been developed by scientists at the University of New South Wales, Australia.

Based on copper(0)-mediated living radical polymerization, the method involves a core first approach using a multi-functional initiator in connection with iterative copper(0)-mediated radical polymerization steps. No purification is required between the successive chain extension steps as complete monomer conversion is reached before the addition of each consecutive monomer type.

Synthesis of multi-block copolymer stars using a simple iterative Cu(0)-mediated radical polymerization technique: Cyrille Boyer, Aurelia Derveaux, Per B. Zetterlund and Michael R. Whittaker, Polym. Chem., 2012, 3, 117-123

To keep up-to-date with all the latest research, sign up for the journal’s e-alerts or RSS feeds or follow Polymer Chemistry on Twitter or Facebook.

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Conference feedback-Precision Polymer Materials (P2M)

1st Precision Polymer Materials (P2M) networking meeting was held in Strasbourg, France between December 11th and 14th. The conference was funded by the European Science Foundation (ESF) and chaired by Sebastien Lecommandoux. There were 94 attendees, who presented 34 lectures and 56 posters. The best 10 posters were selected and each presenter was awarded with 1000 euro by the ESF that they can spend towards the MRS meeting expenses in Boston, USA. The alphabetical list of the names and titles of the poster prize winners is as follows.

  • Elaboration of micellar gels based on metal-ligand interactions
    Jérémy Brassinne, Universite Catholique de Louvain, Belgium
  • Novel block copolymers for use in non-polar non-aqueous dispersion polymerisations: replacements for poly(hydroxystearic acid)-g-poly(methyl methacrylate)
    Kate Belsey, University of Kent, United Kingdom
  • Polymeric Vesicles with Dynamically Controlled Surfaces
    René Brinkhuis, Radboud University of Nijmegen, Netherlands
  • Polylactide stereocomplexes based on modified carbon nanotubes
    M. Brzezinski,Polish Academy of Sciences, Poland
  • Double modified polymers based on polythiol formation and thiol-ene reactions
    Fabienne Goethals, Ghent University, Belgium
  • Controlling inorganic crystallization by organized polymer films
    Agnieszka Jagoda, University of Basel, Switzerland
  • Polymer vesicles: Biomimetism and membrane properties
    Maïté Marguet, Universite de Bordeaux, France
  • Synthesis of Sequence-Defined Oligopeptide-Polymer Conjugates via Atom Transfer Radical Polymerization
    Anna Meszynska, University of Strasbourg, France
  • Selective Adsorbents for Nucleobases and Nucleobase-Containing Compounds
    Anna Plewa, University of Krakow, Poland
  • Smart Polymeric Sensors
    Gertjan Vancoillie, Ghent University, Belgium

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Polymer Chemistry Author of the Week-Levent Demirel

A. Levent Demirel received his B.Sc. degree in Electrical Engineering & Physics from Boğaziçi University, Istanbul, in 1989, and Ph.D. degree in Physics from University of Illinois, Urbana-Champaign, USA in 1996. He was postdoctoral researcher at FOM Institute AMOLF in Amsterdam in 1996-1997. He joined Koç University Chemistry Department as faculty member in 1997 where he was promoted to full professor in 2008. Currently, he is the Associate Dean of College of Sciences. He has received TÜBİTAK (Turkish Scientific and Technical Research Council) Young Scientist Award in 1999, TÜBA (Turkish Academy of Sciences) Young Scientist Award in 2001 and Koç University Werner von Siemens Excellence Award in 2003. In 2006, he has been elected as associate member of Turkish Academy of Sciences. His current research interests are in the field of surface and polymer physical chemistry.

Please follow the link for further information on Levent’s research group and his recent paper published in Polymer Chemistry.

What was your inspiration in becoming a chemist?

 

Though my current research is in the field of physical chemistry, I am a physicist by training. I will be happy as long as I stay in science as a major, whether it is physics or chemistry. I was fond of numbers, calculations and equations as a kid. My aunt was a primary school teacher at a village. When I was about 5 years old, I attended her classes for a while where I met numbers and calculations first time. Then at the high school I had very inspiring physics, chemistry and math teachers. I started as an electrical engineering undergraduate, but my desire to understand single transistor dominated over analyzing complex electronic circuits and I went for PhD in Physics at University of Illinois, Urbana-Champaign. I later switched to soft matter physics, by chance, and worked under the supervision of Prof. Steve Granick on viscoelasticity of molecularly thin liquid films. Then at postdoc, I worked on thin films of liquid crystals and block copolymers. There is a lot overlapping in physics and chemistry when you work on soft matter and I naturally moved into the field of physical chemistry after starting as a faculty member at Koç University Chemistry Department.

What was the motivation behind the research in your recent Polymer Chemistry paper? (DOI: 10.1039/C1PY00463H)

The question we are after is quite fundamental and practical: Why are initially clear homogeneous polymer solutions not stable in time and agglomerates formed? Chemists do not like it when chemicals can not be dissolved in a solvent for further analysis or processing, but frequently encounter it in the lab especially with macromolecules. The change in temperature, pH may trigger such irreversible agglomeration among other reasons. Poly(2-isopropyl-2-oxazoline) was known to form irreversible crystalline fibers when kept above cloud point temperature for extended times. We expected the same for poly(2-ethyl-2-oxazoline) (PEOX) as similar interactions are in charge, but could not observe any structure formation for a long time. My PhD student Pınar Tatar Güner was patient enough to wait long (several weeks) to observe that crystalline PEOX fibers are also formed. Then, we controlled this self-assembly process by electrolytes and characterized these fibers structurally.

Why did you choose Polymer Chemistry to publish your work?

As much as I can, I regularly check the contents of every new issue of the major journals in my field. Since its first issue in 2010, I found many high quality papers, very relevant to my research interests in every issue of Polymer Chemistry. It already had high impact on my research and I decided to send it to Polymer Chemistry.

In which upcoming conferences may our readers meet you?

I plan to attend to ACS Spring Meeting in San Diego, USA, in March 2012 where there will be a session on poly(2-oxazoline)s.

How do you spend your spare times?

My wife and I like travelling and spending time in nature.

Which profession would you choose if you were not a scientist?

I would choose a profession where I can spend more time out in the field – being a farmer, an archeologist, a field biologist, a geologist.

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Make the most of the last few weeks of free access to Polymer Chemistry

Polymer Chemistry issue 2 front coverFree online access to Polymer Chemistry will cease at the start of 2012, but there is still time to take a look at all the articles we’ve published so far free of charge.

 

We hope you’ve enjoyed – and will continue to enjoy – reading the articles we publish. One of the highlights of the last year was the Emerging Investigators Issue with Rachel O’Reilly and Andrew Dove as the guest editors which gives a flavour of some of the most exciting research being discovered in these recently established labs.  Another highlight was the polymer bioconjugates themed issue front coverPolymer Bioconjugates themed issue guest edited by Jan van Hest and Brent Sumerlin which gives an overview of this exciting and fast developing area.

 

Don’t forget all the latest Advanced Articles are listed on the Polymer Chemistry home page and the most popular articles are shown on the Most Read Articles tab.

 

If you would like to continue to receive access to Polymer Chemistry in 2012 please recommend Polymer Chemistry to your librarian.

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Hot Paper: Versatile synthesis of temperature-sensitive polypeptides by click grafting of oligo(ethylene glycol)

Graphical abstract: Versatile synthesis of temperature-sensitive polypeptides by click grafting of oligo(ethylene glycol)A series of thermoresponsive polymers suitable for releasing drugs from polymer nanoparticles have been created by a team at Changchun Institute of Applied Chemistry, China.

The team synthesised a series of thermoresponsive oligo(ethylene glycol)-grafted polypeptides that can self-assemble into amphiphilic nanoparticles in aqueous solution. These polymers show sharp temperature-dependent phase transitions and the lower critical solution temperature can be adjusted from 22.3 to 74.1 °C by varying the molecular weight, the length of the OEG side chain, the polymer concentration and salt concentration. The polymer nanoparticles are not toxic and the team demonstrated their drug release profiles using doxorubicin as a model drug.

Versatile synthesis of temperature-sensitive polypeptides by click grafting of oligo(ethylene glycol): Yilong Cheng, Chaoliang He, Chunsheng Xiao, Jianxun Ding, Xiuli Zhuang and Xuesi Chen, Polym. Chem., 2011, 2, 2627-2634

To keep up-to-date with all the latest research, sign up for the journal’s e-alerts or RSS feeds or follow Polymer Chemistry on Twitter or Facebook.

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Polymer Chemistry Author of the Week – Masami Kamigaito

Masami Kamigaito was born in 1965 in Nagoya, Japan. He received his B.S. (1988), M.S. (1990), and Ph.D. (1993) in polymer chemistry from Kyoto University under the direction of Professor Toshinobu Higashimura. After conducting postdoctoral research with Professor Mitsuo Sawamoto, he joined the faculty of Kyoto University in 1995, where he was promoted to Associate Professor in 1999. In 2003, he moved to Nagoya University and worked as an Associate Professor with Professor Yoshio Okamoto. In 2004, he was promoted to Professor. From 1997–1998, he worked as a visiting scientist at Stanford University with Professor Robert M. Waymouth. He was the recipient of the 2001 Arthur K. Doolittle Award of the ACS PMSE Division, the 2009 Wiley Polymer Science Award of the Society of Polymer Science, Japan, and the 2010 Japan IBM Science Award (Chemistry). His research interests include controlled radical and cationic polymerizations, the development and application of new polymerizations to precision polymer synthesis, and controlled polymerizations of renewable vinyl monomers.

Please follow the link for further information on Masami’s research group and his recent paper in Polymer Chemistry.

 

What was your inspiration in becoming a chemist?

My family. I have always been interested in the natural sciences. My father studied Physics at the University, as did my elder brother. My preference for Chemistry in high school and my desire to choose a different field from that of my father and brother led me to study Chemistry at the University.

What was the motivation behind the research in your recent Polymer Chemistry paper? (DOI: 10.1039/C1PY00401H)

Our group has worked on controlling the molecular weight, stereochemistry, and monomer sequence in radical polymerization by designing polymerization systems, including monomers, initiators, catalysts, and additives. Since I collaborated with Professor Yoshio Okamoto and learned stereospecific radical polymerization, we began researching the simultaneous control of molecular weight and tacticity and its application for the synthesis of novel types of controlled polymers. The RAFT copolymerization of bulky methacrylate and methacrylic acid, which have different reactivities and stereoselectivities, permitted the synthesis of stereogradient polymers, in which the tacticity can be varied from syndiotacticity to isotacticity.

Why did you choose Polymer Chemistry to publish your work?

This paper was submitted to a themed issue of New Methods of Polymer Synthesis, which was guest-edited by Professors Christopher Barner-Kowollik, Jean-François Lutz, and Sebastien Perrier, in which many readers working in this field have a strong interest. In addition, Polymer Chemistry is becoming one of the most attractive journals in polymer chemistry, as evidenced by the quality of the papers published therein.

In which upcoming conferences may our readers meet you?

Most certainly, I will be attending the 9th Society of Polymer Science Japan International Conference (IPC2012) at Kobe in Japan from 11/12/2012 to 14/12/2012, which will be announced at http://www.spsj.or.jp/english-index.htm, because I am a member of the Program Committee.

How do you spend your spare times?

I play with my three (9, 7, and 3 years old) children.

Which profession would you choose if you were not a scientist?

Archeologist. It is another profession I wanted to choose, because I had experiences in finding flint implements when I was a child.

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Hot Paper: Anionic polymeric ionic liquids with high charge delocalization

Graphical abstract: Design and synthesis of new anionic “polymeric ionic liquids” with high charge delocalizationA new family of polymeric ionic liquids could find use as materials for electrochemical devices.

The team led by A. S. Shaplov synthesised three ionic monomers with highly delocalized anions and mobile aprotic cations. These monomers were designed to mimic the structure of three highly conductive anions. A radical polymerization procedure was then used to form the polymeric ionic liquids. Interested to know more? Read the full article for free. 

Design and synthesis of new anionic “polymeric ionic liquids” with high charge delocalization: A. S. Shaplov, P. S. Vlasov, M. Armand, E. I. Lozinskaya, D. O. Ponkratov, I. A. Malyshkina, F. Vidal, O. V. Okatova, G. M. Pavlov, C. Wandrey, I. A. Godovikov and Y. S. Vygodskii, Polym. Chem., 2011, 2, 2609-2618

To keep up-to-date with all the latest research, sign up for the journal’s e-alerts or RSS feeds or follow Polymer Chemistry on Twitter or Facebook.

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Polymer Chemistry Issue 1 of 2012 out now!

The first issue of Polymer Chemistry, 2012, is now online. You can read the full issue here:

Dave Haddleton and Liz Davies look over Polymer Chemistry’s highlights of the past year and look forward to 2012 in their Editorial.  




The outside front cover features an article on Self-assembled amino acids and dipeptides as noncovalent hydrogels for tissue engineering by Derek M. Ryan and Bradley L. Nilsson.






Aqueous RAFT/MADIX polymerisation of N-vinyl pyrrolidone
at ambient temperature is the article highlighted on the inside front cover by Aymeric Guinaudeau, Stéphane Mazières, D. James Wilson and Mathias Destarac.

Issue 1 contains the following Review articles:

Fancy submitting an article to Polymer Chemistry? Then why not submit to us today!

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Polymer Chemistry Author of the Week-David M. Lynn

David M. Lynn received a B.S. in Chemistry from the University of South Carolina in 1994 and a Ph.D. in Chemistry from Caltech in 1999, where he worked under the supervision of Professor Robert H. Grubbs. After a postdoctoral stint at the Massachusetts Institute of Technology with Professor Robert Langer, he joined the faculty in the Department of Chemical and Biological Engineering at the University of Wisconsin – Madison in 2002. His current interests include the design of functional polymers, macromolecular assemblies, and surfaces/interfaces, with a particular focus on the development of new materials platforms that address problems of biomedical and biotechnological importance.

 

 

Please follow the link for further information on David’s research group and his recent paper in Polymer Chemistry.

What was your inspiration in becoming a chemist?

That’s a good question – I guess it’s worth it every once in a while to stop and think about how you got to where you are. I started out as a biology major in college and jumped ship to chemistry after my first taste of organic chemistry. My first real push in the direction of polymer chemistry came through a summer research experience with Harry Gibson at Virginia Tech. Looking back I’m not sure that I accomplished very much that summer (sorry, Harry!), but I had a lot of fun – and if it weren’t for the fun parts I’m not sure I’d have continued down this path.

What was the motivation behind the research in your recent Polymer Chemistry paper?

Well, this paper is a review article, so our first objective here was of course to try to provide a comprehensive overview and analysis of research on azlactone-functionalized polymers and materials. There’s been quite a bit of work going on in this area by many different groups over the last decade, and hopefully this review will contribute to a growing awareness of it. My own interest in these reactive polymers is motivated by many things (read the review!), but all of our current efforts grew out of some interactions a few years ago with Steve Hielmann at 3M. Steve was the first person to bring azlactone chemistry to my attention, and he and his colleagues have been very supportive along the way.

Why did you choose Polymer Chemistry to publish your work?

This was an invited review, so the choice was easy in this case. But we’ve had our eye on the journal from the outset – it has certainly come a long way in a very short amount of time.

In which upcoming conferences may our readers meet you?

I’ve got a new baby coming in January, so I’ve tried to reduce travel for a bit. But I already know I’ll be at the World Biomaterials Congress in China in June and the Controlled Release Society meeting in Quebec in July.

How do you spend your spare time?

I don’t have a lot of spare time, but I try to ride my bike as often and as far as I can when I do. I guess it depends on what you like, but southwestern Wisconsin has an endless number of unbelievable roads and fantastic hilly terrain that makes for great riding – at for least for about seven months out of the year (it gets a bit cold here in the winter).

Which profession would you choose if you were not a scientist?

Good question. I need to think about a backup plan. Am I too old to be an astronaut?

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Top Ten most-read Polymer Chemistry articles in October

This month sees the following articles in Polymer Chemistry that are in the top ten most accessed for October:

Thiol-ene “click” reactions and recent applications in polymer and materials synthesis
Andrew B. Lowe
Polym. Chem., 2010, 1, 17-36
DOI: 10.1039/b9py00216b

Synthesis of multi-block copolymer stars using a simple iterative Cu(0)-mediated radical polymerization technique
Cyrille Boyer, Aurelia Derveaux, Per B. Zetterlund and Michael R. Whittaker
Polym. Chem., 2012, Advance Article
DOI: 10.1039/c1py00384d

Conjugated polymer nanostructures for organic solar cell applications
Jiun-Tai Chen and Chain-Shu Hsu
Polym. Chem., 2011, 2, 2707-2722
DOI: 10.1039/c1py00275a

Diels–Alder “click” reactions: recent applications in polymer and material science
Mehmet Atilla Tasdelen
Polym. Chem., 2011, 2, 2133-2145
DOI: 10.1039/c1py00041a

Ambient temperature polymer modification by in situ phototriggered deprotection and thiol–ene chemistry
Thomas Pauloehrl, Guillaume Delaittre, Martin Bastmeyer and Christopher Barner-Kowollik
Polym. Chem., 2012, Advance Article
DOI: 10.1039/c1py00372k

Controlled polymerizations for the synthesis of semiconducting conjugated polymers

Ken Okamoto and Christine K. Luscombe
Polym. Chem., 2011, 2, 2424-2434
DOI: 10.1039/c1py00171j

Synthesis of ABC type miktoarm star copolymers by triple click chemistry

Birol Iskin, Gorkem Yilmaz and Yusuf Yagci
Polym. Chem., 2011, 2, 2865-2871
DOI: 10.1039/c1py00352f

Self-assembled amino acids and dipeptides as noncovalent hydrogels for tissue engineering
Derek M. Ryan and Bradley L. Nilsson
Polym. Chem., 2012, Advance Article
DOI: 10.1039/c1py00335f

Synthesis and photovoltaic properties of narrow band gap copolymers of dithieno[3,2-b:2′,3′-d] thiophene and diketopyrrolopyrrole
Abasaheb V. Patil, Woo-Hyung Lee, Kyuri Kim, Hanok Park, In Nam Kang and Soo-Hyoung Lee
Polym. Chem., 2011, 2, 2907-2916
DOI: 10.1039/c1py00274k

Facile synthesis of cross-linked patchy fluorescent conjugated polymer nanoparticles by click reactions
Vüsala Ibrahimova, Seyma Ekiz, Özlem Gezici and Dönüs Tuncel
Polym. Chem., 2011, 2, 2818-2824
DOI: 10.1039/c1py00332a


Why not take a look at the articles today and blog your thoughts and comments below.

Fancy submitting an article to Polymer Chemistry? Then why not submit to us today!

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