疏水缔合水溶性聚合物的合成研究进展

综述了疏水缔合水溶性聚合物的合成的最新研究进展。主要合成方法有非均相共聚、均相共聚、胶束共聚、反相微乳液聚合、无皂乳液聚合、活性阴离子聚合以及超临界二氧化碳介质等。     

疏水缔合水溶性聚合物AO的溶液粘度行为研究

研究了稀溶液中疏水链链长、无机电解质NaCl和CaCl2对疏水缔合水溶性丙烯酰胺／甲基丙烯酰氨乙基-二甲基烷基溴化铵／丙烯酸钠共聚物(AO)在水溶液中的特性粘数和Huggins常数的影响，以及聚合物AO-8的特性粘数和Huggins常数随温度的变化。结果表明：在稀溶液中，无机电解质离子强度增大，共聚物AO在NaCl和CaCl2溶液中的特性粘数减小，Huggins常数增大。在亚浓溶液范围对聚合物质量分数、温度、剪切速率及NaCl含量对聚合物的水溶液表现粘度的影响进行了研究，观察到疏水缔合聚合物盐水溶液在NaCl含量提高的情况下，出现的增粘现象。     

疏水缔合型水溶性高分子的合成与表征

本文综述了疏水缔合型水溶性高分子的合成与表征方法，６文中介绿了在合成过程中提高油溶性单体和水溶性单体的混溶性以及疏水基团均匀分布的方法，并了用核磁共振，上光谱等方法测定疏水物含量的方法。     

一种疏水缔合水溶性聚合物的合成及其溶液性能

粘度;抗盐性;表面活性剂;一种疏水缔合水溶性聚合物的合成及其溶液性能     

Synthesis and Characterization of Novel Hydrophobically End-Capped Poly(ethylene oxide)s [PEOs]

We report on the synthesis and characterization of a novel hydrophobically modified end-capped poly(ethylene oxide)s. The end-capping agent of this polymer was designed and synthesised from a renewable resource material namely, gallic acid (i.e. 3,4,5-trihydroxybenzoic acid), the byproduct of tannin industry. The hydroxyl groups at 3, 4 and 5 positions of gallic acid provide an opportunity for varying the hydrophobicity of the compound. The hydrophobic end-capping compound, 3,4,5-tridodecyloxy bezoylazide was prepared from gallic acid and PEGs with different chain lengths (of number average molecular weights, 10000 and 35000 g/mol) were end-capped using 3,4,5-tridodecyloxybenzoyl azide. The quantitative analysis of end-capping in the polymers was demonstrated by ¹H-NMR spectroscopy and the rheological studies were carried out in the surfactant solutions.     

疏水缔合水溶性聚合物P(DMDAAC-NVP-IOA)与萘普生相互作用及释药性

以水为介质,采用自由基胶束聚合制备了二甲基二烯丙基氯化铵(DMDAAC)、N-乙烯基吡咯烷酮(NVP)和丙烯酸异辛酯(IOA)三元共聚疏水缔合水溶性聚合物P(DMDAAC-NVP-IOA),测定了聚合物的聚电解质性质和疏水缔合性质.应用IR、XRD、DSC测试技术研究了各组分的相互作用.结果表明,所制备的P(DMDAAC-NVP-IOA)同时具有聚电解质和疏水缔合特性.随P(DMDAAC-NVP-IOA)量增加,IR分析中萘普生羧基的羰基伸缩振动峰1 684 cm-1处峰变宽、强度明显减弱;XRD分析中的12°～29°间衍射峰逐渐变宽、变小直至消失;DSC分析中只有1个转变曲线,P(DMDAAC-NVP-IOA)与萘普生之间存在分子级相互作用.在pH=7.4磷酸盐缓冲液中,疏水缔合水溶性聚合物具有药物缓释特性,可用扩散-溶解模型进行最佳拟合.     

Hydrophobically Associating Polyacrylamides Prepared by Inverse Suspension Polymerization: Synthesis,Characterization and Aqueous Solution Properties

Hydrophobically associating polyacrylamides (HAPAMs) were synthesized via inverse suspension polymerization using ammonium persulphate (APS)/tertramethylethylenediamine (TEMED) as the redox initiators, 2-methacryloyloxyethyl n-alkyl dimethyl ammonium bromide (DM-n, n = 8, 12, 16) as the hydrophobic comonomers. The structures of the copolymers were elucidated by FT-IR and ionic chromatographic analysis, respectively. The morphology and particle size of the resultant HAPAMs were characterized by scanning electronic microscope (SEM) and laser particle size analyzer, which revealed that spherical particles were formed and the particle size exhibited Gaussian distribution centered from 25 μ m to 162 μ m. Furthermore, the solution properties of the copolymers were studied with viscometry and the results showed that HAPAMs synthesized under optimal conditions exhibited an obvious viscosity enhancement in aqueous solution and excellent salt-tolerant capability in brine.     

孪尾疏水缔合丙烯酰胺/丙烯酸钠/N,N-二辛基丙烯酰胺共聚物的合成与性能

孪尾疏水缔合丙烯酰胺/丙烯酸钠/N; N-二辛基丙烯酰胺共聚物的合成与性能;孪尾;胶束聚合;水溶性聚合物;疏水缔合;合成;粘度     

新型疏水缔合聚合物P(AM/POEA)与表面活性剂的相互作用

采用粘度法、荧光探针和透射电镜研究了新型疏水缔合聚合物P(AM/POEA)和表面活性剂SDS和CTAB在水溶液中的相互作用. 聚合物P(AM/POEA)结构中, 疏水体(2-苯氧乙基丙烯酸酯)呈嵌段状无序地分布在聚丙烯酰胺主链上. 这类聚合物很容易和表面活性剂相互作用, 通过疏水缔合, 形成混合胶束状聚集体, 导致溶液粘度剧增. 随聚合物溶液中SDS的加入, 溶液粘度发生大幅度起伏变化, 出现最大值. 粘度最大值对应的表面活性剂浓度c_S,max位于表面活性剂CMC附近, 并发现它的位置不随聚合物微结构而变化. 然而它们缔合作用的增粘程度却与聚合物疏水体含量X_H及疏水嵌段尺寸N_H有关. 在实验浓度范围内, X_H和N_H愈大, 溶液的粘度越高. 此外用透射电镜直接观察到聚合物/表面活性剂体系中聚集体的交联结构形貌.     

Hydrothermal Synthesis,Structural Characterization,Magnetic and Photoelectric Properties of Two Cobalt(II) Coordination Polymers

Two cobalt(II) coordination polymers, {[Co(μ‐4,4′‐bipy)(4,4′‐bipy)₂(H₂O)₂]·(OH)₃·(Me₄N)·4,4′‐bipy·4H₂O}_n ( 1 ) and {[Co(μ‐4,4′‐bipy)(H₂O)₄]·suc·4H₂O}_n ( 2 ) (4,4′‐bipy = 4,4′‐bipyridine, suc = succinate dianions), were hydrothermally synthesized and structurally characterized by X‐ray diffraction analysis, UV‐Vis‐NIR, and ICP. The main structure feature common to the both polymers is presence of the infinite linear chains, [Co(μ‐4,4′‐bipy)(4,4′‐bipy)₂(H₂O)₂]_n ( 1 ) and [Co(μ‐4,4′‐bipy)(H₂O)₄]_n ( 2 ), respectively. In 1 , the chains are further linked by the hydrogen‐bond and π‐π stacking interaction, producing extended layer structure. The 4,4′‐bipy molecules in 1 play three different roles. In 2 , the chains are linked into three‐dimensional network structure via complicated hydrogen bonding system. The variable temperature (2.0～300 K) magnetic susceptibility of 1 indicates a tendency of spin‐transition in the temperature range of 110 K to 22 K, which attributes to the transition of high‐spin to low‐spin from Co²⁺(d⁷) ion. Also, the result of surface photovoltage spectroscopy (SPS) reveals that the polymer 1 has significant photoelectric conversion property in the region of 300‐800 nm.     

树枝化聚合物的合成、结构表征及其应用

本文综述了由树枝状大分子和线形聚合物结合而形成的一类新型树形聚合物--树枝化聚合物的研究进展,包括树枝化聚合物的各种合成方法、结构表征和形态分析等.同时对树枝化聚合物在催化载体、纳米材料、生化和光电功能材料等领域的应用研究进行了详尽的综述.     

Controlled Activity Polymers. IV. Copolymers of 2-(1-Naphthylacetyl)Ethyl Acrylate With Hydrophilic Comonomers: Synthesis and Characterization

2-(1-Naphthylacetyl)ethyl acrylate (NAEA) was synthesized by esterification of 1-naphthylacetic acid (NAA) and 2-hydroxyethyl acrylate (HEA) and then polymerized to obtain the polymer-bound auxin NAA. The resulting polymer is potentially useful as a plant growth regulator through hydrolytic release of NAA. Copolymers of NAEA with hydrophilic comonomers were prepared by solution polymerization. The copolymer compositions were determined from elemental analysis, ¹³C-NMR, and UV spectroscopy. The copolymer microstructure was predicted from the reactivity ratios in order to investigate the influence on the behavior of controlled release. These model structures will be utilized for assessment of structure/hydrolysis relationships in a subsequent paper.     

Synthesis,Characterization and Bactericidal Properties of Poly(N-vinyl-2-pyrrolidone-co-Maleic anhydride-co-N-Isopropyl acrylamide)

Summary: Radical-initiated terpolymerization of maleic anhydride (MA), N-vinyl-2-pyrrolidone (NVP) with N-isopyropyl acrylamide (NIPA) has been prepared as a way to obtain new water-soluble polymers. Structure, composition and thermal behaviour of synthesized terpolymers were determined by FTIR, UV-vis, ¹H NMR spectroscopy, elemental analysis (N content), differential scanning calorimetry, thermogravimetric and differential thermal analysis, gel permeation chromatography analysis (GPC), scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). The terpolymer composition-structure-property relationship indicates that the semicrystalline structure of terpolymers with different reaction times, degrees of crystallinity, and thermal behaviour depends on the content of carboxyl and amide-containing monomer linkage. The antimicrobial activities the terpolymers were evaluated against pathogen bacteria: Staphylococcus aureus, Salmonella enteridis, Streptococcucs faecalis, Eschericia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa. The antimicrobial activity was explored by the well-diffusion technique. All the studied polymers, containing biologically active moieties in the form of ionized cyclic amide and carboxylic acid groups, were more effective against Gram-positive than Gram-negative bacteria. The bactericidal effect of terpolymers against Gram negative bacteria increased with the increasing reaction times.     

壳聚糖-O-聚(寡聚乙二醇甲基丙烯酸酯)的原子转移自由基聚合与表征

基于原子转移自由基聚合(ATRP)和十二烷基硫酸钠(SDS)-壳聚糖(CS)复合物(SCC)的位置选择性改性策略,合成了结构可控的壳聚糖-O-聚(寡聚乙二醇甲基丙烯酸甲酯)(CS-POEGMA)刷状衍生物.通过在SCC的羟基上引入溴代异丁酸后脱除SDS得到大分子引发剂O-溴化壳聚糖(CS-Br).用红外光谱(FT-IR...     

Synthesis and Structure of Ag(I)-Containing Coordination Polymers Based on Quaternary Ammonium Template Reagent

1 INTRODUCTION The influence of organic components on the mi- crostructures of inorganic solids has been extensively reported in recent years and shown to provide an efficacious method for the design of new materials[1～3]. Owing to their potential applications as new func- tional solid materials, interest in self-assembled co- ordination polymers with novel physical properties has grown rapidly[4～7], and many complexes like Bu4N[Ag3I4][8], {[(n-C4H9)4N]2Ag4.95Cu(I)1.05I8}n[9], [C6H…     

Coordination Chemistry of Acrylamide: 1. Cobalt(II) Chloride Complexes with Acrylamide – Synthesis and Crystal Structures

The molecular structures of blue dichloro‐tetrakis(acrylamide) cobalt(II), [Co{O‐OC(NH₂)CH=CH₂}₄Cl₂] ( 1 ) and pink hexakis(acrylamide)cobalt(II) tetrachlorocobaltate(II), [Co{O‐OC‐(NH₂)CH=CH₂}₆][CoCl₄] ( 2 ), characterized by single X‐ray diffraction, IR spectroscopy and elemental analyses, are described. The coordination of Co^II in 1 involves a tetragonally distorted octahedral structure with four O‐donor atoms of acrylamide in the equatorial positions and two chloride ions in the apical positions. The second complex 2 in ionic form contains Co^II cations surrounded by an octahedral array of O‐coordinated acrylamide ligands, accompanied by a [CoCl₄]^2? anion.     

Synthesis and Characterization of Two Distinct 2D Nickel(II) Coordination Polymers From Dicarboxylate and Flexible Bis(imidazole) Ligands

Two nickel(II) coordination polymers, formulated as {[Ni₂(bix)₂(tbta)₂(H₂O)₄] · 0.25H₂O}_n ( 1 ) and [Ni₂(bix)(aip)₂(H₂O)₂]_n ( 2 ) [bix = 1, 4‐bis(imidazol‐1‐ylmethyl)benzene, H₂tbta = tetrabromoterephthalic acid, H₂aip = 5‐aminoisophthalic acid] were synthesized under hydrothermal conditions and structurally characterized by single‐crystal X‐ray diffraction methods, IR spectroscopy, TGA, and elemental analysis. Complex 1 exhibits a 2D (4, 4) layer with {4⁴.6²} topology. Complex 2 shows 2D (3, 4)‐connected 3 , 4L83 sheets, which are finally extended into an unusual (5, 6)‐connected 3D supramolecular network by classic hydrogen bond interactions. Fluorescence, UV/Vis diffuse reflection spectra, and catalytic properties of two complexes for the degradation of the methyl orange dye in a photo‐Fenton‐like process were investigated.     

交联聚合物合成,结构及性能的表征

结合具体实例论述了交联聚合物合成、结构及性能的仪器测试方法（如色谱、光谱、力学性质及热性能的测试）及其特点。     

Synthesis and Characterization of Small Band-gap Conjugated Polymers - Poly(pyrrolyl methines)

A kind of small band-gap conjugated polymers-poly (pyrrolyl methines) and their precursors-(poly pyrrolyl methanes) have been synthesized by a simple method and characterized by 1HNMR, FT-IR, TGA and UV-Vis. These polymers can be dissolved in high polar solvents such as DMSO, DMF or NMP. The results reveals that the band-gap of the synthesized conjugated polymers are in the range of 0.96～1.14 eV and they all belong to the small band-gap polymers. The conductivity of doped products with iodine is in the range of semiconductor.     

Molecularly Imprinted Polymers for Stir Bar Sorptive Extraction: Synthesis,Characterization, and Application

Stir bar sorptive extraction is widely used for the preconcentration of organic and inorganic compounds due to its simplicity and versatility. However, commercially available devices are based on nonselective sorbents. Molecularly imprinted polymers provide selective recognition abilities from the template employed during their preparation. In this review, strategies employed for recent for molecularly imprinted polymers employed in stir bar sorptive extraction are described. The advantages and disadvantages are described, as well as future trends involving this preconcentration methodology.