Archive for September, 2011

Hot Review: Catalytic chain transfer and its derived macromonomers

In this Hot Review Johan P. A. Heuts and Niels M. B. Smeets give an overview of cobalt-catalyzed chain transfer in free-radical polymerization and the chemistry and applications of its derived macromonomers.

Graphical abstract: Catalytic chain transfer and its derived macromonomers

Johan P. A. Heuts and Niels M. B. Smeets, Polym. Chem., 2011, DOI: 10.1039/C1PY00224D, Advance Article

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Polymer Chemistry Author of the Week – Mathias Destarac

  

Pr. Mathias Destarac was born in Nogent sur Marne, France, in 1970. He undertook his undergraduate studies in France at the University of Montpellier and obtained his “Diplome d’Ingenieur” in 1993 in the field of materials science. He received his PhD in 1997 from the University of Montpellier for his studies on controlled radical polymerization. He then got a postdoctoral fellow position in Pr. Matyjaszewski’s group at Carnegie Mellon University in Pittbursgh, USA, where he focused his research work on atom transfer radical polymerization. He moved to Rhodia France in late 1998 to undertake the challenge of industrial research. His Rhodia research has mainly focussed on developing the RAFT/MADIX polymerization. Over the course of his career at Rhodia, he occupied successive positions as Senior Research Fellow, Project Manager and Scientific Expert. He originated and supervised a great deal of academic collaborations on various aspects of polymerization chemistry.

He left industry for academia in 2007 when he was appointed Professor of Chemistry at the University Paul Sabatier of Toulouse, France. He started his own research group (Free-Radical Polymerization: Macromolecular Engineering and Architectures) in the Fundamental and Heterochemistry Laboratory. His research interests lie in various fields related to controlled radical polymerization (mostly RAFT) including the design of novel controlling agents, polymerization kinetics, double hydrophilic and amphiphilic controlled architectures, and polymer-inorganic nanohybrids.

He published sixty scientific articles, contributed three book chapters and was co-inventor for more than sixty patents.

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

 What was your inspiration in becoming a chemist?

I was studying sciences and had the luck to meet a very inspirational chemistry teacher who made me want to find out more. Polymers came later, once again after I met an excellent teacher.

What was the motivation behind the research in your recent Polymer Chemistry paper? (DOI: 10.1039/C1PY00209K)

During my years working in industry, one of my main research topics of interest was the synthesis of amphiphilic block copolymers and their use in various fields of applications as emulsion stabilisers. When I moved to academia, I met Dr. Jean-Daniel Marty who is an expert in the physicochemical behavior of polymers in unusual media. We thought that combining our two fields of expertise would lead to interesting science such as our project described in this paper on the solubility behavior of new RAFT/MADIX amphiphilic block copolymers in supercritical carbon dioxide.

Why did you choose Polymer Chemistry to publish your work?

I was excited that the Royal Society of Chemistry was setting up a journal in my field. After I read the first couple of issues, I thought it would  quickly become a high impact journal.

In which upcoming conferences may our readers meet you?

2011 was the international year of chemistry, so I attended many interesting conferences in my field. Next year will be quieter and so far, I plan to attend Warwick 2012, UK, next July. I also wish to mention an event special to my heart: next June (5-7) in Toulouse, I co-organize the first French conference on synthesis, properties and applications of amphiphilic copolymers (Copamphi 2012). More details about the event will come out soon !

How do you spend your spare times?

I work hard, but I try to spend as much time as possible with my family and friends. My ideal day would be a morning playing with my kids followed by a long lunch with good food and good company with an indie rock soundtrack, afterwards a siesta and then another long dinner with everyone I love around me.

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

I think I would like to be a guitar player but I never had the time to learn.

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Polymer Chemistry Author of the Week-Ian Manners

Ian Manners was born in London and, after receiving his Ph.D. from the University of Bristol, he conducted postdoctoral work in Germany and then in the USA. He joined the University of Toronto, Canada as an Assistant Professor in 1990 and was promoted to Full Professor in 1995 and to a Canada Research Chair in 2001. In 2006 he returned to his Alma Mater to take up a Chair in Inorganic, Macromolecular and Materials Chemistry.  His research interests focus on the development of new synthetic approaches involving catalysis and self-assembly and their applications in molecular chemistry, polymer and materials science, and nanoscience. His work is documented in over 540 career publications and he has given over 360 invited lectures worldwide.

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

What was your inspiration in becoming a chemist?

My father shared with me his great enthusiasm for science. I remember many visits to the Science Museum in South Kensington when I was very young. He was an organic chemist and had many old text books that I would read. As it turned out, I found inorganic chemistry and physics far more interesting at that time, although now my current interests are now very broad and I also find organic materials fascinating.

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

Usually polymers and metals are regarded as mutually exclusive. In the project that led to this paper we are interested in the preparation of polymers containing high concentrations of metal centres that can be used to fabricate well-defined metallic nanostructures directly by thermal or photochemical treatment.

Why did you choose Polymer Chemistry to publish your work?

It is an impressive, new, and ambitious journal and seemed a perfect venue for the work.

In which upcoming conferences may our readers meet you?

I have been to numerous conferences this year and not many are left – the next will the the joint Japan/Korea conference on Advanced Soft Nanomaterials in Sapporo, Japan (31 October – 1 November).

How do you spend your spare times?

I spend time with my wife, Deborah – we enjoy traveling, good restaurants and hiking, for example – and also with my daughter and her partner in Bristol. I also enjoy spending time in Canada in visits to my son, wife, and our first grandson, Rhys, who was born in July.

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

A non-fiction writer or composer.

 

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Conference feedback-APME 2011

APME 2011, “IUPAC 9th International Conference on Advanced Polymers via Macromolecular Engineering”, was held at Dedeman Cappadocia Hotel & Convention Center, Cappadocia, TURKEY, from September 5th to 8th, 2011. The aim of the APME 2011 was to discuss the fundamental aspects and recent developments of macromolecular engineering and evaluate its potential in the syntheses of smart materials from complex structures (grafts, brushes, dendrimers, etc.) to nanostructures (self-assembly, nano-size, etc.) for a wide range of applications.

The APME 2011 was attended by 220 participants from 25 different countries. There were 80 oral and 170 poster presentations in the conference. The poster prizes were awarded to:

1st Functionalization of MW-CNT by Demet Karaca Balta, Ahmet Ozsen, Nergis Arsu

2nd Photo Cross-Linked pH and Temperature Sensitive Positively Charged Hydrogel Films for the Immobilization of Enzymes by Anne Richter, Dietmar Appelhans, Brigitte Voit

3rd Asymmetric flow field-flow fractionation (AF4) for the characterization of different polymer systems by Esra Altuntas, Martin Hager, Ulrich S. Shubert

The APME 2011 was organized by Dr. Yusuf Yagci (Co-chairman), Dr. Munmaya K. Mishra (Co-chairman) and Dr. M. Atilla Tasdelen (General Secretary). The selection of Cappadocia for the location of APME 2011 provided an exciting atmosphere for the exchange of scientific ideas. The APME 2011 provided a useful platform for scientific, social and cultural interactions amongst the participants. The organizing committee would like to sincerely thank all the participants for their contributions to the success of the meeting.

The next APME 2013 will be held in Durham Centre for Soft Matter, Durham University, United Kingdom.
The symposium will be chaired by Dr. Lian R. Hutchings.


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Polymer Chemistry Author of the Week-Julien Poly

Julien Poly received chemistry diplomas from “Ecole Normale Supérieure de Cachan” and “Ecole Nationale Supérieure de Chimie de Paris”. He obtained his PhD in polymer chemistry in 2008 from the University of Bordeaux, where he studied the synthesis of nanogels by controlled radical crosslinking copolymerization under the supervision of Prof. Daniel Taton. In 2009, he was appointed as assistant professor at the University of Haute-Alsace. He joined the CNRS institute IS2M, where he is now developing macromolecular synthesis for surface engineering.

Please follow the link to get more information on Julien’s research institute and his recent paper in Polymer Chemistry.

What was your inspiration in becoming a chemist?

I was first of all interested in sciences in general, but like many others, I was mainly attracted to chemistry thanks to excellent teachers and to fascinating experiments. The learning then of some of the elegant theories governing chemistry definitely convinced me to become a chemist.

What was the motivation behind the research in your recent Polymer Chemistry paper? (DOI: 10.1039/c1py00231g)

My research activities concern principally the synthesis of branched or crosslinked polymers by controlled radical polymerizations. I wanted to develop a new strategy for the synthesis of well-defined branched poly(vinyl acetate)s, which are commonly used polymers, by combining the concept of SCVP with a xanthate-mediated RAFT mechanism. I appealed to the skills of Dr. Nicolas Blanchard in organic chemistry for the preliminary synthesis of the original polymerizable xanthate, which was a little bit tricky.

Why did you choose Polymer Chemistry to publish your work?

Polymer Chemistry has become one of the top journals in Polymer Science, with a particular focus on synthetic aspects. This was therefore an ideal place to publish this work. Additionally, I appreciated the publication process, which was especially efficient.

In which upcoming conferences may our readers meet you?

I will attend the Aquitaine Polymer Conference in Arcachon, France in October. I will be then at the Pacific Polymer Conference in Jeju, South Korea in November, where I will present the results from this paper.

How do you spend your spare times?

I often do do-it-yourself or restore secondhand goods. More usually, I enjoy reading, cooking, swimming and travelling.

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

I might have been a cabinetmaker or an antique dealer. Being a gastronomic critic would have been another pleasant profession too!

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Top Ten most-read Polymer Chemistry articles in July

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

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 

Reversible cross-linking of hydrophilic dynamic covalent polymers with radically exchangeable alkoxyamines in aqueous media 
Jing Su, Yoshifumi Amamoto, Masamichi Nishihara, Atsushi Takahara and Hideyuki Otsuka 
Polym. Chem., 2011, 2, 2021-2026 
DOI:10.1039/c1py00176k 

Multiresponsive polymers: nano-sized assemblies, stimuli-sensitive gels and smart surfaces 
George Pasparakis and Maria Vamvakaki 
Polym. Chem., 2011, 2, 1234-1248 
DOI:10.1039/c1py00176k 

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

Modular synthesis of poly(perylene bisimides) using click chemistry: a comparative study 
Andreas S. Lang and Mukundan Thelakkat 
Polym. Chem., 2011, 2, 2213-2221 
DOI:10.1039/c1py00191d 

Polymeric vesicles in biomedical applications 
René P. Brinkhuis, Floris P. J. T. Rutjes and Jan C. M. van Hest 
Polym. Chem., 2011, 2, 1449-1462 
DOI:10.1039/c1py00061f 

FDA-approved poly(ethylene glycol)–protein conjugate drugs 
Steevens N. S. Alconcel, Arnold S. Baas and Heather D. Maynard 
Polym. Chem., 2011, 2, 1442-1448 
DOI:10.1039/c1py00034a 

Controlled polymerizations for the synthesis of semiconducting conjugated polymers 
Ken Okamoto and Christine K. Luscombe 
Polym. Chem., 2011, Advance Article 
DOI:10.1039/c1py00171j 

Temperature and pH responsive hybrid nanoclay grafted with PDMAEMA 
Jukka Niskanen, Mikko Karesoja, Teemu Rossi and Heikki Tenhu 
Polym. Chem., 2011, 2, 2027-2036 
DOI:10.1039/c1py00143d 

RAFT-synthesized copolymers and conjugates designed for therapeutic delivery of siRNA 
DeeDee Smith, Andrew C. Holley and Charles L. McCormick 
Polym. Chem., 2011, 2, 1428-1441 
DOI:10.1039/c1py00038a 

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 or alternatively email us  your suggestions.

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Polymer Chemistry Author of the Week – Didier Bourissou

Didier Bourissou, born in Nice (1972) studied chemistry at the Ecole Normale Superieure in Paris. He obtained his Ph D. degree in 1998 under the supervision of G. Bertrand at the Laboratory of Coordination Chemistry, University of Toulouse (Dina Surdin Award from the French Chemical Society). He then worked as a research associate with F. Mathey and P. Le Floch at the Ecole Polytechnique in Palaiseau. He is currently CNRS Director of Research at the “Laboratoire Hétérochimie Fondamentale et Appliquée” in Toulouse (University Paul Sabatier, CNRS) and Associate Professor at the Ecole Polytechnique in Palaiseau. His research interests span a wide range of topics in main group, transition metal and polymer chemistry. These include the interplay between ambiphilic derivatives and metal fragments as well as small molecules; the coordination of indenyl rings featuring donor sidearms to get access to original low-hapticity complexes; the synthesis and applications of biodegradable polymers (new activated/functionalized monomers, controlled organo-catalyzed ring-opening polymerization, drug delivery systems). He was awarded the Bronze Medal of the CNRS (French National Research Council), the Clavel Lespiau Distinction (French Academy of Sciences) and the Acros Award (French Chemical Society) in recognition of this work.

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

What was your inspiration in becoming a chemist?

I’ve always been interested in sciences, especially mathematics and physical sciences, and I’ve had the chance to get passionate and stimulating teachers at school. My inspiration to become a chemist has also certainly to do with my fascination for drawing new chemical entities and transformations thereof. I always found exciting to play with atoms and bonds to try to assemble complex structures, hopefully in a controlled and efficient way.

What was the motivation behind the research in your recent Polymer Chemistry paper? (DOI: 10.1039/C1PY00210D)

Molecular chemist by training, I am always impressed by the efficiency and degree of control with which simple synthetic tools can be applied to the preparation of macromolecules. In this respect, my group has been particularly interested over the last few years in the use of simple organo-catalysts to promote controlled Ring-Opening Polymerization. In particular, we have shown that sulfonic acids are rather efficient, and our interest for understanding their precise mode of action revealed some striking features: the highest activities are not always met with the most acidic catalysts, and the acidic activation of the heterocyclic monomer is critically accompanied by some participation of the basic S=O moiety, the catalyst acting overall as a proton shuttle. In building on these studies, we became interested in phosphoric and phosphoramidic acids with the aim of further exploring the potential of Brönsted acid catalysis in ROP. In this article, we report our first results along these lines, from both experimental and computational perspectives.

Why did you choose Polymer Chemistry to publish your work?

Polymer Chemistry clearly represents an ideal tribune to disseminate our work within the community. The editing and production processes are very straightforward and efficient, and the quality of the papers is really impressive and stimulating. The number and content of peer-review journals tend to explode frenetically, and I am rather sceptical about that. But in this context, Polymer Chemistry is a pleasing exception. The new journal of the RSC strongly contributes to the development of polymer chemistry and nicely completes the series of journals of the field.

In which upcoming conferences may our readers meet you?

I invite you to attend and join us at the first French Meeting on Amphiphilic Copolymers to be held next May in Toulouse. In addition, we have a chance to meet and chat next July at Warwick 2012, a polymer conference under the auspices of the UK Polymer Group (thanks Andrew for the kind invitation, I am really looking forward to being there!).

How do you spend your spare times?

Most of my spare time is devoted to my family. We have a lot of fun skying and hiking together, as well as watching rugby games. Travelling together is also very enjoyable and we very much appreciate having good time with friends / colleagues.

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

I would probably be doctor. I’ve always been amazed and fascinated by the complexity and efficiency of the human body.

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