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Biodegradable amphiphilic block copolymers containing functionalized PEO blocks:Controlled synthesis and biomedical potentials

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Science China Chemistry 2010年第3期53卷 519-527页

作者： ZHANG Yu1,2,SUN PeiJian1,2 & GAN ZhiHua1 1cas key laboratory of engineering plastics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China 2Graduate University of Chinese Academy of Sciences,Beijing 100039,China 1. cas key laboratory of engineering plastics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100039 China

A series of controllable amphiphilic block copolymers composed of poly(ethylene oxide)(PEO) as the hydrophilic block and poly(ε-caprolactone)(PCL) as the hydrophobic block with the amino terminal group at the end of the PEO chain(PCL-b-PEO-NH2) were *** on the further reaction of reactive amino groups,diblock copolymers with functional carboxyl groups(PCL-b-PEO-COOH) and functional compounds RGD(PCL-b-PEO-RGD) as well as the triblock copolymers with thermosensitive PNIPAAm blocks(PCL-b-PEO-b-PNIPAAM) were *** well-controlled structures of these copolymers with functional groups and blocks were characterized by gel permeation chromatography(GPC) and 1H NMR *** copolymers with functionalized hydrophilic blocks were fabricated into microspheres for the examination of biofunctions via cell culture experiments and in vitro drug *** results indicated the significance of introducing functional groups(e.g.,NH2,COOH and RGD) into the end of the hydrophilic block of amphiphilic block copolymers for biomedical potentials in tissue engineering and controlled drug release.

关键词： amphiphilic block copolymers biodegradable polymers functional terminal group cell growth drug release

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Polymerization-Rendered Polypropylene/Clay Nanocomposites:An In-Reactor Polymerization and Properties

Polymerization-Rendered Polypropylene/Clay Nanocomposites:An...

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5th International Symposium on High-Tech Polymer Materials

作者： Jin-Yong Dong cas key laboratory of engineering plastics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

＜正＞Polyolefins （PE and PP,etc） are among the most interesting polymers deemed to benefit the most from the formation of nanocomposite with clay （mostly montmorillonite,MMT） due to their widespread *** particular,isotactic polypropylene （i-PP）,one of the most important class of polyolefins possessing many superior material properties in terms of mechanical,thermal,and

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Hierarchical Approaches to Catalytic Preparation of Advanced PP Materials

Hierarchical Approaches to Catalytic Preparation of Advanced...

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2011年全国高分子学术论文报告会

作者： Jin-Yong Dong cas key laboratory of engineering plastics,Joint laboratory of Polymer Science and Materials,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190

＜正＞In this oral presentation I will summarize our research results on the hierarchical approaches to catalytic preparation of advanced PP *** include a) DVB/H2 consecutive

关键词： polyolefin high performance hierarchical approaches catalytic preparation

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Synthesis, Characterization and Microsphere Fabrication of Biodegradable Block Copolymers Containing Amino End Groups

Synthesis, Characterization and Microsphere Fabrication of B...

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2006年海峡两岸高分子学术研讨会

作者： Zhihua Gan, Guoqiang Yu, and Xudong Shi The cas key laboratory of engineering plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080

＜正＞Biodegradable polymers have shown great potential in biomedical field and environmental protection. They has been developed to the current stage of third generation of biomaterials which not only must possess the comprehensive material properties such as good mechanical strength, thermal properties and proper biodegradation rate, but also have the bioactivities to stimulate the cell growth and to recognize the specific cells when they are used as scaffolds for tissue engineering and as carriers for drug delivery. Therefore, how to imitate the structure of extracellular matrix （ECM） which have various proteins and peptides on the surface, and how to modify the surface of biodegradable polymeric materials via chemical and physical methods are one of the most important issues in the current research fields.

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PREPARATION AND RHEOLOGICAL PROPERTIES OF HIGH MELT STRENGTH ISOTACTIC POLYPROPYLENES FROM COPOLYMERIZATION OF PROPYLENE AND DIVINYLBENZENE USING A MgCl2/TiCl4 CATALYST

PREPARATION AND RHEOLOGICAL PROPERTIES OF HIGH MELT STRENGTH...

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第三届工程塑料国际学术研讨会

作者： Hongying Wang Jin-Yong Dong cas key laboratory of engineering plastics Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

＜正＞Isotactic polypropylene （iPP） is a fast growing commodity resin with many desirable and beneficial properties such as high stiffness, high resistance to corrosive chemicals, and low specific gravity. However, ...

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Improving dispersion of multiwalled carbon nanotubes in polylactide via grafting five hydroxyl-terminated polylactide

Improving dispersion of multiwalled carbon nanotubes in poly...

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4th International Symposium on engineering plastics

作者： Zhaohua XU Zhigang WANG~* cas key laboratory of engineering plastics Beijing National laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

＜正＞Polylactide（PLA）,as a biodegradable polymer,is drawing increasing attention due to academic and commercial ***,the preparation of polymer nanocomposites with carbon nanotubes（CNTs） has already been proved to be an effective way to modify the polymers[1-5].Therefore,the combination of PLA and CNTs is expected to form nanocomposites with enhanced ***,the

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Synthesis of well-defined functional PE graft copoly-mers via ATRP process

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Science Bulletin 2005年第10期50卷 1048-1051页

作者： CAO Chengang1, 2, DONG Jinyong1 & HU Youliang1 1. cas key laboratory of engineering plastics, Joint laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 2. Graduate School, Chinese Academy of Sciences, Beijing 100039, China cas key laboratory of engineering plastics Joint Laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China

In summary, we have demonstrated a convenient yet highly efficient method forthe preparation of PE-based graft copolymers via ATRP.. By introducing a small amount of styrenegroups into PE chains via the selective copolymerization of ethylene with 1,4-divinylbenzenecatalyzed by Et(Ind)_2ZrCl_2/MAO, the multifunctional ATRP initiator of1-chloroethylbenzene-containing PE was readily achieved by a quantitative hydrochlorination reactionand was shown to be very effective for the initiation of graft polymerization of MMA and styrene toprepare structurally well-defined PE-based graft copolymers.

关键词： ATRP Synthesis of well-defined functional PE graft copoly-mers via ATRP process PE well

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Effect of alkyl side chain crystallization on packing mode of main chains in N-alkylated PPTA comblike polymers

Effect of alkyl side chain crystallization on packing mode o...

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4th International Symposium on engineering plastics

作者： Lei Kong Ying Zhao Dujin Wang Beijing National laboratory for Molecular Sciences cas key laboratory of engineering plastics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

＜正＞In the past two decades,a large number of alkyl-substituted or alkoxy-substituted rigid rod-like polymers including aromatic polyesters,aromatic polyamides, polyanilines,and poly（3-alkylthiophene） have been synthesized,and much attention has been paid on how the alkyl side chains affect the condensed structure and the properties of these comb-like *** is still not unambiguous how the interplay

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Effects of interplay between liquid-liquid phase separation and crystallization on mechanical properties of polyolefin blends

Effects of interplay between liquid-liquid phase separation ...

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第三届工程塑料国际学术研讨会

作者： Liang Yang Yanhua Niu Zhigang Wang* cas key laboratory of engineering plastics Joint laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 P. R. China

＜正＞The relationship between processing and morphology of polymer blends is the key issue to influence their application properties. The interplay between phase transitions including liquid-liquid phase separation ...

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Analysis of transition routine and packing structure of the confined long alkyl side groups:crossover of mesophase to crystalline structure

Analysis of transition routine and packing structure of the ...

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4th International Symposium on engineering plastics

作者： Haifeng Shi~(+ *) Xingxiang Zhang ~+ Yong Zhou ~(++) and Dujin Wang~(++) Institute of Macromolecular and Functional Fiber Tianjin Polytechnic University Tianjin 300160 China Beijing National laboratory for Molecular Sciences cas key laboratory of engineering plastics Joint laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

＜正＞Investigation of the transition routine and packing structure of the confined long alkyl side groups not only contributes the understanding of the microscale packing situation of side groups,but also provides one suitable way to probe the early stages of crystallization of *** our present experimental results on N-alkylated poly（p-benzamide）s（PBA（n）Cs）,polyethyleneimines（PEI（n）Cs）,and

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