检索结果-南通市图书馆

Chinese Journal of Polymer Science 1998年第4期16卷 351-355页

作者：郭天瑛宋谋道周庆业郝广杰张邦华 Institute of Polymer Chemistry Nankai University the State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Tianjin 300071 China

Well-defined nonionic hydrophilic ω-acryloyl poly(ethylene oxide) macro-monomer (PEO-A) has been prepared by living anionic polymerization of ethylene oxidewith diphenyl methyl potassium as the initiator and acryloyl chloride as the reaction termi-nating agent. The polymer was characterized by FTIR and SEC. The emulsifier-free emul-sion polymerization of methyl methacrylate (MMA) and n-butyl acrylate (BA) containingvarious concentrations of PEO-A was studied. In all cases stable emulsion coplymerizationsof MMA and BA were obtained. The stabilizing effect was found to be dependent on themolecular weight and the feed amount of the macromonomer.

关键词： macromonomer ω-Acryloyl poly(ethylene oxide) Emulsifier-free emulsion copolymerization Methyl methacrylate-n-butyl acrylate copolymer

Synthesis of Dendronized Aromatic Polyamides with Chloromethyl Groups in the Periphery by macromonomer Approach

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第11期17卷 1507-1510页

作者： Mei Hua LIU Wei Jian XU Xiao Cong XU Yah Bing LU Yah Ru MIAO College of Chemistry ＆ Chemical Engineering Hunan University Changsha 410082

The preliminary results for one-pot synthesis of dendronized aromatic polyamides with chloromethyl groups in the periphery by approach were reported first time. The GPC analysis of the resulting dendronized polymers h... 详细信息

关键词： macromonomer dendronized functionalized polyamide.

Preparation of stable micropatterns of gold on cell-adhesion-resistant hydrogels assisted by a hetero-bifunctional macromonomer linker

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2014年第4期57卷 645-653页

作者： SUN JianGuo GRAETER Stefan V TANG Jian HUANG JingHuan LIU Peng LAI YuXiao YU Lin MAJER Günter SPATZ Joachim P DING JianDong State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Research Centre Eye and ENT Hospital Fudan University Department of New Materials and Biosystems Max Planck Institute for Intelligent Systems Biophysical Chemistry Institute of Physical Chemistry University of Heidelberg

Surface patterning is very useful in biomaterial studies, yet it is not easy to prepare a micropattern with cell-adhesion contrast that is stable in a wet environment. Recently, a platform technique of transfer photolithography was invented to fabricate stable metal microarrays on the surface of a cell-adhesion resistant and mechanically biomimetic poly（ethylene glycol） hydrogel; the linker is the key chemical in such a transfer strategy. This article reports the design and synthesis of a hetero-bifunctional macromonomer linker with a thiol group at one end and an acryloyl group at the other end. The bifunctional linker was char- acterized by GPC and ~H NMR, and the average number of thiol groups in the bifunctional linker was detected by Ellman＇s reagent. The regent stability under wet conditions was also confirmed by the model reactants. The resultant micropatterned surfaces are meaningful for future studies of cell behaviors on mechanically biomimetic matrixes.

关键词： biomaterials hydrogels micropattern macromonomer cell adhesion

SYNTHESIS AND POLYMERIZATION OF α-METHACRYLYOXYLETHYLOXYCARBONYLMETHYL-ω-(N,N-DIETHYLDITHIOCARBAMYL)POLYSTYRENE macromonomerS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2000年第6期18卷 515-520页

作者：丘坤元 Department of Polymer Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Polystyrene macromonomers with different molecular weight were prepared by radical polymerization of styrene(St) in benzene using β-methacryloxylethyl 2-N,N-diethyldithiocarbamylacetate (MAEDCA) as a *** of the macromonomer by ~1H-NMR showed that the end groups were α-methacrylyoxylethyloxycarbonyl-methyl and ω-(N,N-diethyldithiocarbamyl). The macromonomer was difficult to homopolymerize, but it was easilycopolymerized with methyl methacrylate (MMA) initiated by AIBN to form graft copolymers (PMMA-g-PSt) with PStbranches randomly distributed along the PMMA backbone. Copolymerization reaction and the structure of the graft copolymers were strongly affected by M_n and concentration of the macromonomer. The composition and M_n of the purified graft copolymer were determined by ~1H-NMR and GPC analysis.

关键词： Monomer-iniferter Photoiniferter macromonomer Living radical polymerization Graft copolymer

Ceiling Degree of Polymerization for Brush Polymers Prepared via ROMP of Poly（tert-Butyl Acrylate） macromonomers

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2018年第5期34卷 828-832页

作者： QIAO Yaping YUAN Xiaoyan ZHAO Yunhui REN Lixia School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin 300072 P. R. China

Controlled preparation of brush polymers is important in the design of functional materials. In this study, poly（tert-butyl acrylate） macromonomers functionalized with norbornenyl end group（NB-PtBA） were synthesized via atom transfer radical polymerization in three different molecular weights, 2000（NB-PtBA-2k）, 3000（NB-PtBA-3k）, and 8000（NB-PtBA-8k）. Additionally, brush polymers with PtBA as side chains were synthesized via ring-opening metathesis polymerization（ROMP）. Kinetic studies on ROMP of NB-PtBA showed that there was a ceiling degree of polymerization（CDP） for the brush polymers, beyond which the polymerization of NB-PtBA was out of control. For brush polymers of P[NB-PtBA-2k] and P[NB-PtBA-3k], CDPs were estimated to be ca. 400, but the value of P[NB-PtBA-8k] was ca. 100. Therefore, the controlled ROMP of brush polymers was critical at the CDP limit with increased macromonomer molecular weight.

关键词： Ring-opening metathesis polymerization macromonomer Brush polymer Ceiling degree of polymeriza- tion Kinetics study

SYNTHESIS OF HETEROARM STAR POLYMERS COMPRISING POLY(4-METHYLPHENYL VINYL SULFOXIDE) SEGMENT BY LIVING ANIONIC POLYMERIZATION

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2010年第5期28卷 819-828页

作者：赵优良 Key Lab of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow University

A series of 3-arm ABC and AA＇B and 4-arm ABCD, AA＇BC and AA＇A＂B heteroarm star polymers comprising one poly（4-methylphenyl vinyl sulfoxide） segment and other segments such as polystyrene, poly（a-methylstyrene）, poly（4-methoxystyrene） and poly（4-trimethylsilylstyrene） were synthesized by living anionic polymerization based on diphenylethylene （DPE） chemistry. The DPE-functionalized polymers were synthesized by iterative methodology, and the objective star polymers were prepared by two distinct methodologies based on anionic polymerization using DPE-functionalized polymers. The first methodology involves an addition reaction of living anionic polymer with excess DPE-functionalized polymer and a subsequent living anionic polymerization of 4-methylphenyl vinyl sulfoxide （MePVSO） initiated from the in situ formed polymer anion with two or three polymer segments. The second methodology comprises an addition reaction of DPE-functionalized polymer with excess sec-BuLi and a following anionic polymerization of MePVSO initiated from the in situ formed polymer anion and 3-methyl-1,1-diphenylpentyl anion as well. Both approaches could afford the target heteroarm star polymers with predetermined molecular weight, narrow molecular weight distribution （Mw/Mn 〈 1.03） and desired composition, evidenced by SEC, 1H-NMR and SLS analyses. These polymers can be used as model polymers to investigate structure-property relationships in heteroarm star polymers.

关键词： Star polymer Anionic polymerization macromonomer DPE chemistry.

SYNTHESIS AND CHARACTERIZATION OF REACTIVE GRAFT COPOLYMER PDMS-g-(PEO-OH)

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1995年第3期13卷 273-279页

作者：邱永兴俞小洁封麟先 Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027

A new reactive graft copolymer, poly (dimethyl siloxane)-graft-omega-hydroxyl-poly (ethylene oxide) (PDMS-g-(PEO-OH)), was synthesized by the hydrosilylation reaction of alpha, omega-bifunctional PEO macromonomer (CH2=CH-CH2-PEO-OH) with poly (hydromethylsiloxane) (PHMS). The obtained copolymer, exhibited the expected comblike structure as indicated by the result of detailed characterization and the needed reactivity as demonstrated by the result of esterification between PDMS-g-(PEO-OH) and aminoacetic acid. This reactive graft copolymer is expected to be very useful in the preparation of new bioactive polymer materials.

关键词： ALPHA-ALLYL-PI-HYDROXYL POLYETHYLENE OXIDE macromonomer REACTIVE GRAFT COPOLYMER HYDROSILYLATION

Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2002年第1期18卷 61-64页

作者： CHEN Ming-qing LIU Xiao-ya YANG Cheng AKASHI Mitsuru School of Chemical and Material Engineering Southern Yangtze UniversityWuxi 214036P.R.China Department of Applied Chemistry and Chemical Engineering Faculty of EngineeringKagoshima UniversityKagoshima 890-0065Japan

A poly（ tert -butyl methacrylate）（PBMA） macromonomer was synthesized by anionic polymerization with bis（2,6-di- t -butyl phenoxy） methyl aluminum [MeAl（ODBP）2] as the initiator and trimethylsilylmethacrylate（TMSMA） as the end capping agent in dry THF. Then, a poly（methacrylic acid）（PMAA） macromonomer was obtained by means of hydrolysis reaction from the PBMA macromonomer in the presence of hydrochloric acid. The structures of the PBMA macromonomer were characterized by using 1H NMR. It was found that the resulted PBMA macromonomer has highly isotactic properties and the PMAA macromonomer has an end vinyl group on per polymer chain. The monodisperse polymeric microspheres, which consisted of polystyrene cores and PMAA branches on their surfaces, were prepared by the dispersion copolymerization of styrene with the PMAA macromonomer in an ethanol/water mixed solvent. It was found that the concentration of the PMAA macromonomer would affect the microsphere formation, the morphology and its size in the copolymerization system.

关键词： macromonomer Isotactic structure Dispersion copolymerization Microsphere

SYNTHETIC STUDIES ON BLOOD COMPATIBLE BIOMATERIALSⅡ. SYNTHESIS OF POLY(ETHYLENEGLYCOL MONOMETHYLLTHER ) METHACRYLATE AND ANTITHROMBOGENICITY OF ITS COPOLYMERS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1992年第2期10卷 119-126页

作者：林思聪王锦刘晓宁屠湘同 Charles L. Liotta Department of Chemistry Nanjing University Nanjing School of Chemistry Georgia Institute of Technology Atlanta U. S. A.

Poly （ethyleneglycol monomethylether） methacrylate （PEGMM）was synthesized by means of the reaction of methacrylyl chloride with sodium monomethylpolyethyleneglycoxide and was characterized by FTIR,;H-NMR,and ultraviolet spectrometries. A series of poly （vinyl alcohol）-graft-PEGMM （PVA-g-PEGMM ）and methyl methacrylate-PEGMM copolymer （PMMA-PEGMM） were prepared and tested for antithrombogenicity in vitro. The results indicate that the antithrombogenicity of the copolymers basically increases with the increasing of the DP of polyoxyethylene （POE） chain and tends to a plateau after the DP around 114,i.e. the long chain structure of POE is favourable to the antithrombogenicityof its copolymers ;moreover, the extent of the improvement ofantithrombogenicity also relates to the PEGMM content of the copolymers and the kind of the matrix that the POE chains are located on. These results are consistent with the anticipation of the hypothesis of maintaining proteins normal conformations for blood compatible bioraaterials.

关键词： Antithrombogenicity, Blood compatible biomaterials macromonomer Poly (vinyl alcohol) Copolymer Poly (ethyleneglycol monomethylether) methacrylate

SYNTHESIS OF A COMB GRAFT COPOLYMER VIA RING OPENING METATHESIS POLYMERIZATION CATALYZED BY SUPPORTED RHUTHENIUM CARBENE COMPLEX

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Reactive Polymers 2001年第2期10卷 97-101页

作者： LIHong ZHANG Wenfan HE Binglin The State Key Laboratory of Functional Polymeric Materials for Adsorption and Separation.Institute of Polymer Chemistry Nankai UniversityTianjin 300071P.R.China

Chloromethyl-2-norbornene was synthesized via Diels-Alder reaction of cyclopentadiene and allyl chloride using a polymer supported boron trifluoride as the catalyst, and was then lithiated and used to initiate a living anionic polymerization of styrene to prepare a macromonome, 5-polystyryl-2-norbornene NBPS. Comb graft copolymer PNBgPS was synthesized via ring opening metathesis polymerization of the macromonomer under the catalysis of ruthenium carbene complex RuCl2(PPh3)2(=CCHtBu) and its polymer supported correspondent. Experimental results showed that the behavior of both the supported boron and supported ruthenium catalysts are superior to their unsupported counterparts. The possible promotion mechanism of the tailor-made supports is discussed.

关键词： Ring opening metathesis polymerization Anionic polymerization macromonomer Comb graft copolymers Polymeric catalysts