Author of the Week: Wantai Yang

Dr Wantai Yang received his bachelor’s degree from Tsinghua University in China in 1982 and MS degree in 1985 from Beijing Institute of Chemical Technology (presently known as Beijing University of Chemical Technology, BUCT), and Ph.D. degree from Royal Institute of Technology in Sweden in 1996. He started his research career in 1985 at BUCT where he is currently a Professor of Polymer Chemistry and serves as Dean of College of Materials Sci. & Eng. He has published more than 290 peer-reviewed papers in international journals and filed over 15 patents. He also has been an invited speaker and/or chairman at more than 20 international meetings. Professor Yang has received many honors and awards for his outstanding research achievements, including Natural Science Award of Ministry of Education (2009), China National Science Fund for Distinguished Young Scholar (1999) and Chair Professor of Cheung Kong Scholars Programme (2001). He is the Vice-President of Chinese Society for Imaging Science and Technology (CSIST), and members of the editorial board of several journals including Biomacromolecules, Chinese Journal of Polymer Science, Membrane Sci. and Tech., Process Engineering and Thermosetting Resin.

His research interest focuses on basic/fundamental chemistry for polymer synthesis and modification. At present his main directions include photopolymerization, controlled/living polymerization, heterogeneous polymerization, new chemistry for surface modification of  organic polymeric material.

For more information, see: http://www.cmse1.buct.edu.cn/ywt/cncss/yjly.asp

What was your inspiration in becoming a chemist?

There are two reasons for me to become a chemist. One is the strong will to know what is polymer science, which seems so curious and mysterious to me before I went to university. Another is due to my high school teacher, who is a very kind person. When I knew he graduated from major of Polymer Science of Tsinghua University just before applying to university, I firmly determined to study polymer science.

What was the motivation to write this article? (DOI: 10.1039/C2PY20117H)

As we known, although the developments in the past 20 years have involved a series of breakthroughs in the living radical polymerization (LRP) field, we have to face the fact that due to inherent drawbacks for each method, even abundant efforts have been endeavored, large-scale industrial applications of LRP remain a big challenge, and a possible alternative solution is return to full organic system. We have presented the first example of living radical graft polymerization on the surface of polymeric materials by use of benzophenone (BP), xanthone and 9-fluorenone as graft polymerization photoinitiators (Macromolecules, 1996, 29, 3308). Therefore, one motivation of this work is to direct the similar reaction into bulk and solution polymerization system to open/explore a novel controlled/living radical polymerization. While another motivation, we hope, our work could attract more chemists pay attention to full organic, especially to this kind of system with cycloketone compounds.

Why did you choose Polymer Chemistry to publish your work?

Although it is a new journal, Polymer Chemistry has become one of top journal in polymer science. It is our great pleasure to publish our work in this journal due to its good visibility.

In which upcoming conferences may our readers meet you?

I will attend the 20th Annual International Conference on Composites or Nano Engineering, ICCE-20, July 22-28, 2012 in Beijing and the 244th ACS National Meeting in Philadelphia on 19–23 August 2012.

How do you spend your spare times?

I enjoy swimming, sing songs, or listen to music.

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

I would probably be a farmer or architect.

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Paper of the Week: Poly(ethylene) brushes grafted to silicon substrates

A poly(glycidyl methacrylate) (PGMA) synthesized by RAFT polymerization was spin-coated onto a silicon substrate to yield, after annealing and rinsing unreacted chains, covalently attached epoxy-containing PGMA pseudo-brushes. A tailor-made ω-amino-poly(ethylene) (Mn = 1040 g mol−1, PDI = 1.3) was then grafted in melt at 130 °C for 24 h by reaction between amine chain-ends and surface-tethered epoxy groups. After discarding unreacted poly(ethylene) chains by sonication and Soxhlet rinsing, the resulting poly(ethylene) brushes were characterized by scanning probe microscopy, water contact angle and neutron reflectivity measurements. The grafting of poly(ethylene) brushes to silicon substrates has thus been demonstrated for the first time and resulted in nanostructured grafted layers with homogeneous surface coverage.

Poly(ethylene) brushes grafted to silicon substrates by Denis Damiron, Jérôme Mazzolini, Fabrice Cousin, Christophe Boisson, Franck D’Agosto and Eric Drockenmuller Polym. Chem., 2012, 3, 1838-1845.

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Paper of the Week: From-syndiotactic-to-isotactic stereogradient polymers

Graphical abstract: From-syndiotactic-to-isotactic stereogradient methacrylic polymers by RAFT copolymerization of methacrylic acid and its bulky esters

Stereogradient polymers are a new class of polymers in which the tacticity continuously changes from one chain end to the other. Such polymers may exhibit special properties or functions that originate from gradual changes in the physical or chemical properties along the polymer backbone. In this article, the synthesis of stereogradient polymers with tacticities that vary from predominantly syndiotactic to highly isotactic was investigated by reversible addition–fragmentation chain transfer (RAFT) copolymerization of bulky methacrylates, such as triphenylmethyl methacrylate (TrMA) and 1-phenyldibezosuberyl methacrylate (PDBSMA) and methacrylic acid (MAA) in both non-polar and polar solvents. With the differing reactivities and stereospecificities or TrMA and MAA, the isotacticity of the resulting copolymer gradually increased from 11% to nearly 100% along the polymer chain. Interestingly, the reported method can be applied to the synthesis of various stereogradient poly(MAA)s or polymethacrylates by postpolymerization modification.

From-syndiotactic-to-isotactic stereogradient methacrylic polymers by RAFT copolymerization of methacrylic acid and its bulky esters by Kenji Ishitake , Kotaro Satoh , Masami Kamigaito and Yoshio Okamoto, Polym. Chem., 20123, 1750-1757.

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Conference: 2012 International Symposium on Stimuli-Responsive Materials, October 21-23

If you haven’t spotted it yet the 2012 International Symposium on Stimuli-Responsive Materials will be held 21st – 23rd October at the Hilton Sonoma Wine Country in Santa Rosa, CA.

Chaired by Marek Urban and Brent Sumerlin, the symposium will cover the design, synthesis, characterization, and understanding of the physical, chemical, and applied principles of stimuli-responsive materials and devices.

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Author of the Week: Gerard Lligadas

Dr Gerard Lligadas received his education in chemistry at the University Rovira i Virgili (URV), Tarragona, Spain. He continued his studies in Tarragona and completed his PhD in 2006 on exploring the utilization of plant oils as renewable feedstock in polymer chemistry. In 2007, a postdoctoral fellowship brought him to Penn University at Philadelphia, USA, where he worked under the direction of Prof. Virgil Percec on the elaboration of single-electron transfer living radical polymerization. At the end of 2008, he came back home becoming Lecturer and joining the Suspol Research Group at URV. His research interests include new bio-based polymers from renewable resources, halogen-free flame-retardant materials and controlled radical polymerization of acrylate and methacrylate monomers.

Research group’s website: http://www.quimica.urv.es/~w3qo/suspolymers/suspolymers

What was your inspiration in becoming a chemist? I had a really great chemistry teacher during high school. But I really got into the organic chemistry and polymer science world after listening to Prof. Juan C Ronda at the University. I got really fascinated by the way he feels science!

What was the motivation to write this article? (DOI: 10.1039/C2PY20273E) The key objectives of our research come under the broad heading of the sustainable polymer chemistry. In our searching of novel biobased polyols for polyurethane technology, we came a couple of years ago with the application of thiol-ene click chemistry to unsaturated fatty acid derivatives with hydroxyl-functionalized thiols. Here, our motivation was to make a step forward and apply thiol-yne coupling to alkyne-derivatized fatty esters for its ability to add double hydroxyl functionality without compromising ester functionality, which may be used for a further polyurethane modification.

Why did you choose Polymer Chemistry to publish your work? Polymer Chemistry attracted us because of the quality of the work it publishes. Moreover, it meets all the criteria of a modern journal: it has a wide scope, a broad readership and promises fast review process and publication – which I can now confirm from my own experience.

In which upcoming conferences may our readers meet you? In February, my wife and I welcomed our first kid. The rest of 2012 will be quite. Next year I plan to attend 3rd Frontiers in Polymer Science Symposium.

How do you spend your spare time? I try to get some quality time each day with my wife and I am also trying to keep active with triathlon…swimming, cycling and running is a perfect release of stress cocktail.

Which profession would you choose if you were not a scientist? Hard to say… but If I would not be a scientist, I would probably be a chef. I really enjoy trying out new recipes. My wife loves it!

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Paper of the Week: One pot synthesis of sugar sensors

Graphical abstract: Direct nitroxide mediated (co)polymerization of 4-vinylphenylboronic acid as route towards sugar sensors

The glucose blood level should be carefully monitored in people suffering from diabetes mellitus. In this view, a wide variety of glucose sensing molecules have been developed in the recent decades, based on boronic acid functionalized dyes that change colour or emission in the presence of glucose. The incorporation of boronic acid moieties as polymer side chains
indeed results in glucose responsive polymers that are insoluble in the absence of glucose and are solubilised in the presence of glucose due to the higher polarity of the stabilized tetragonal anionic boronic acid form. The present work of Hoogenboom and co-workers aims at developping a simple macromolecular synthesis procedure for the preparation of boronic acid containing polymers, making them accessible to a wide range of polymer scientists, beyond polymer chemists. They used a combination of commercial products; the unprotected 4-vinylphenylboronic acid (4-VBA) and the BlocBuilder alkoxyamine initiator for nitroxide mediated polymerization (NMP). The developed NMP method opens up new avenues towards 4-VBA containing polymers to evaluate glucose responsivity of various copolymers, including block copolymers for autonomous insulin delivery upon increasing glucose concentration.

Direct nitroxide mediated (co)polymerization of 4-vinylphenylboronic acid as route towards sugar sensors by Gertjan Vancoillie , Simon Pelz , Elisabeth Holder and Richard Hoogenboom, Polym. Chem., 20123, 1726-1729.

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

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Top 10 most-read Polymer Chemistry articles in May

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

New methods of polymer synthesis 
Christopher Barner-Kowollik, Jean-François Lutz and Sébastien Perrier 
Polym. Chem., 2012, 3, 1677-1679 
DOI: 10.1039/C2PY90007F

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 and post-polymerization modification of poly(pentafluorophenyl methacrylate) brushes 
Kemal Arda Günay, Nicolas Schüwer and Harm-Anton Klok  
Polym. Chem., 2012, Advance Article 
DOI: 10.1039/C2PY20162C 

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

GFP-inspired fluorescent polymer 
Hongping Deng, Qi Zhu, Dali Wang, Chunlai Tu, Bangshang Zhu and Xinyuan Zhu  
Polym. Chem., 2012, Advance Article 
DOI: 10.1039/C2PY20223A 

Supramolecular mimics of phase separating covalent diblock copolymers 
Jingyi Rao, Emilia Păunescu, Mohammad Mirmohades, Ikhlas Gadwal, Abbas Khaydarov, Craig J. Hawker, Joona Bang and Anzar Khan  
Polym. Chem., 2012, Advance Article 
DOI: 10.1039/C2PY20125A 

Functional block copolymer nanoparticles: toward the next generation of delivery vehicles 
Maxwell J. Robb, Luke A. Connal, Bongjae F. Lee, Nathaniel A. Lynd and Craig J. Hawker  
Polym. Chem., 2012, 3, 1618-1628 
DOI: 10.1039/C2PY20131C

Thermoresponsive polymer brush-functionalized magnetic manganite nanoparticles for remotely triggered drug release 
Stéphanie Louguet, Bérengère Rousseau, Romain Epherre, Nicolas Guidolin, Graziella Goglio, Stéphane Mornet, Etienne Duguet, Sébastien Lecommandoux and Christophe Schatz  
Polym. Chem., 2012, 3, 1408-1417 
DOI: 10.1039/C2PY20089A 

Facile fabrication of flower-like nanocomposite microparticles via seeded miniemulsion polymerization 
Jianan Zhang, Xuewu Ge, Mozhen Wang, Mingyuan Wu, Jianjun Yang and Qingyun Wu  
Polym. Chem., 2012, Advance Article 
DOI: 10.1039/C2PY20193C 

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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Polymer Chemistry inaugural impact factor 5.32!

I am delighted to announce that Polymer Chemistry’s inaugural impact factor is 5.32! This is a fantastic achievement for the journal and I would like to thank our Editorial and Advisory Board members and our authors, referees and readers.

Polymer Chemistry is now firmly established as a leading journal in the field, also demonstrated by its #1 immediacy index of all original research journals in the Polymer Science category of the 2011 Journal Citation Reports ®.

 The immediacy index is a measure of how quickly articles are cited, the 2011 immedicay index is an average of how many citations articles published in 2011 received during the year they were published.

So, why not submit your next high impact article to Polymer Chemistry and enjoy the benefits of being an RSC author.

Read more about the 2011 Impact Factors from across RSC Publishing on the RSC Publishing Blog!

 

 

 

Data based on 2011 Journal Citation Reports ®, (Thomson Reuters, 2012)

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Author of the Week: Prof. Laurent Billon

Prof. Laurent Billon received his M.S. from the University of Bordeaux (1992) where he worked on anionic ring opening polymerization of cyclosilazanes.  He obtained his PhD on synthesis of functional telechelic polyimides in 1996 at the University of Pau (UPPA). Subsequent to postdoctoral research for Rhodia/Schlumberger on electro-rheological polyzwitterionic fluids (1998) and Arkema USA on acrylic-modified fluoro-polymers by seeded emulsion (1999), he started his career as Associate Professor in 2000 at the UPPA where he earned the position of Full Professor in 2010 and became Deputy Director of the Polymer team. His research interest focuses on the design of well-defined polymer structures, especially block and gradient copolymers, by controlled radical polymerization techniques.  His research activity is also focused on the development of Surface Initiated Nitroxide Mediated Polymerization to design functional hybrid colloidal particles and pigments with industrial partners. A special attention concerns the self-organized nano/micron structures, such as colloidal crystal, inverse opal or honeycomb patterns, for photonic and responsive surfaces.

What was your inspiration in becoming a chemist?

Since I was a teenager I have been fascinated by the possibility to transform the matter just by an invisible process, the chemistry. A few years after, during my License & Master degrees, I met a wonderful team of teachers in University of Bordeaux I which opened me to a new world: the polymer chemistry.

What was the motivation behind your recent Polymer Chemistry paper? (DOI: 10.1039/C1PY00357G)

It’s a long story because this study on Carbon NanoTubes CNT was developed with an industrial French partner. Few years ago, we patented and published a work on “in situ” polymerization where we were able to graft through the CNT the block copolymer chains during their growth, spontaneously. At this time, we focused only on this aspect and tried to characterize this phenomenon.

In a second contract, we focused on the polymerization kinetic in presence of raw industrial CNT without any post-modification … and we were surprised to observe a strong impact in terms of initiation and enhancement of the kinetic depending of the CNT amount. This work was first patented and finally even if we have not fully identified the mechanism of polymerization, it has been published in Polymer Chemistry. It’s a really an unexpected behavior because the initiation and growth of the chains occur in a controlled manner without any initiator and can also be better controlled by the adding of nitroxide.

This study represents a collaborative project between academic and industrial partners which can be strongly valorized by publication in Polymer Chemistry.

Why did you choose Polymer Chemistry to publish your work?

Polymer Chemistry is an exciting new journal that has become a top journal in the polymer scientific community. It contains innovative and inspiring research related to all aspects of polymer chemistry, only.

In which upcoming conferences may our readers meet you?

I will attend the CSM8 (May 28-31 in Beyrouth, Lebanon), EUPOC 2012 (June 3-7 in Gargnano, Italy) and Warwick 2012 (July 9-12 in Warwick, UK).

How do you spend your spare times?

I run two times a week (sometimes with my daughters) and when I have time, swim and bike. So, if I’m around Pau, in September I participate in a short triathlon or July in the swimming race, crossing the bay of Saint Jean de Luz … just for fun. But I don’t know the reason why, it’s more and more difficult … maybe the global warming!!!

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

I love breads, wines and cheeses, and also jazz and French rock music. To combine all these passions, I think I would have liked to keep a bar where you could taste organic products and enjoy jam sessions in a friendly atmosphere, curl up in sofas.

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Paper of the Week: Remotely triggered drug release from magnetic nanoparticles

Graphical abstract: Thermoresponsive polymer brush-functionalized magnetic manganite nanoparticles for remotely triggered drug release

Over the past decade, considerable interest has been devoted to the development of a variety of nanoparticle-based drug delivery systems for nanomedicine. A large number of drug release strategies have been proposed and may be classified according to the nature of the stimulus used to trigger the process. In this context, Lecommandoux, Schatz and co-workers reported on the design of a thermoresponsive hybrid system for drug delivery purposes by modifying the surface of silica-coated magnetic lanthanum strontium manganite nanoparticles with adsorbed polyether-b-poly(L-lysine) block copolymers. They demonstrated that the thermoresponsiveness of the assemblies was controlled by the ethylene oxide/propylene oxide ratio in the polymer brush and the corresponding LCST of the polyether blocks. The polarity of the polymer layer was also varied to maximize the encapsulation efficiency of a moderately hydrophobic drug like doxorubicin. Eventually, the release of doxorubicin through the synergistic effects of thermoresponsive polymer brushes and magnetically induced heating was demonstrated.

Thermoresponsive polymer brush-functionalized magnetic manganite nanoparticles for remotely triggered drug release by Stéphanie Louguet, Bérengère Rousseau, Romain Epherre, Nicolas Guidolin, Graziella Goglio, Stéphane Mornet, Etienne Duguet, Sébastien Lecommandoux and Christophe Schatz, Polym. Chem., 20123, 1408-1417.

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

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