丙烯酸酯环氧底、面合一阴极电泳涂料的合成及其性能

为了解决现有冷拼底、面合一阴极电泳涂料乳液分层,丙烯酸酯树脂水解胶化的问题,采用接枝反应,合成了丙烯酸酯-环氧底、面合一的阴极电泳涂料。按国家标准检测这一合成涂料的多种性能;研究了甲基丙烯酸甘油脂(GMA)含量对树脂水溶性和胶体颗粒粒径分布的影响,不同中和度对水溶性的影响,混合体系助溶剂对底、面合一阴极电泳涂料的影响。结果表明:通过多胺将带环氧基团的丙烯酸树脂和带环氧基团的环氧树脂进行链接,能解决乳液分层和丙烯酸酯树脂水解胶化的问题;本阴极电泳涂料实现了底、面合一,兼具良好的耐蚀性和耐候性。     

紫外光固化环氧丙烯酸酯/蒙脱土纳米复合材料的合成与表征

利用插层聚合合成了环氧丙烯酸酯／蒙脱土复合光固化树脂，并采用紫外光固化制备了环氧丙烯酸酯／蒙脱土纳米复合材料．用XRD、DSC对光固化过程中蒙脱土的插层和剥离行为进行了研究，并用FT-IR研究了蒙脱土对环氧-丙烯酸酯体系光固化速率的影响。力学试验证实，光固化后的环氧丙烯酸酯／蒙脱土纳米复合材料冲击与弯曲强度比原本体树脂分别提高了54％和10％．     

用液态含环氧基丙烯酸酯低聚物改性环氧树脂

采用溶液聚合法合成了以丙烯酸丁酯为主链的液态含环氧基丙烯酸酯低聚物,并用其对环氧树脂进行增韧改性.讨论甲基丙烯酸环氧丙酯以及低聚物用量对改性环氧树脂力学性能的影响,并研究了改性环氧树脂的微观形态和耐热性能.结果表明:当低聚物用量为10%(质量分数),丙烯酸丁酯和甲基丙烯酸环氧丙酯的质量比为80∶20时,改性环氧树脂的拉伸强度和冲击强度比纯环氧树脂提高6.7%和219.1%,同时体系的耐热性能基本不下降;改性环氧树脂呈两相结构,随低聚物用量增加橡胶粒子粒径尺寸增大;且Tg先升高后降低.     

水性油墨用环氧改性水性丙烯酸树脂的合成

介绍了一种环氧改性水性丙烯酸树脂的合成方法,并由改性树脂配制了水性凹版塑料油墨.讨论了亲水单体含量对树脂水溶性的影响和引入环氧丙烯酸酯含量对油墨附着牢度、复合牢度的影响,并经红外表征证明达到了环氧改性水性丙烯酸树脂的目的.实验表明,由环氧改性水性丙烯酸树脂配制的水性油墨,其性能技术指标达到或优于国家标准和实际应用要求,在凹版塑料油墨领域具有很大的应用价值和广阔的市场前景.     

PBA-b-PHFBMA嵌段共聚物的制备及在涂料中的应用

利用原子转移自由基聚合(ATRP)法合成了丙烯酸丁酯-甲基丙烯酸六氟丁酯嵌段共聚物(PBA-b-PHFBMA),并以核磁共振谱和凝胶渗透色谱对共聚物进行了表征。将制备的含氟嵌段共聚物应用于丙烯酸酯涂料树脂,对其性能进行了研究。结果表明,在丙烯酸酯树脂中加入含氟嵌段共聚物后,树脂的表面性能及耐老化性能有了明显的提高。含氟嵌段共聚物的加入量在10%以上时,丙烯酸酯树脂的表面接触角可从73°提高到90°以上;经紫外光加速老化1700h后,树脂的保光率达90%以上。且含氟嵌段共聚物的加入并不影响丙烯酸酯树脂的其它漆膜性能。     

水性油墨用环氧丙烯酸酯乳液的制备研究

采用半连续种子乳液聚合法制备环氧-丙烯酸酯复合乳液,并以钛白粉为颜料、水性树脂为分散树脂的色浆配制了凹版水性油墨.讨论了乳化剂种类及用量,对乳液及其涂膜性能的影响和引入环氧树脂对乳液和水性油墨性能的影响,并通过FTIR,DSC对乳液进行分析和表征.研究表明环氧树脂与丙烯酸酯发生了接枝反应;当复合乳化剂用量为4.5%,环氧树脂E-44用量为5%时所得环氧丙烯酸酯乳液及其配制的水性油墨性能优异.     

缩聚物/加聚物复合胶乳的制备科学Ⅱ.核壳结构聚氨酯-丙烯酸酯复合乳液的合成与表征

用合成的含羧基端羟基聚氨酯树脂，通过强外力乳化可形成稳定的水性聚氨酯乳液，与苯乙烯和丙烯酸丁酯等单体共聚，合成具有核壳结构的聚氨酯－丙烯酸酯接枝乳液，通过接枝乳液和共混乳液的性能差别对比，及DSC，FT－IR，粒径分析及力学性能测试分析表明，在聚氨酯－丙烯酸酯接枝乳液中，聚氨酯与丙烯酸酯发生部分交联形成稳定的核－壳结构，文中还对聚氨酯－丙烯酸酯接枝乳液的交联机理进行了研究。     

紫外光固化罩光漆用环氧丙烯酸酯树脂的合成及应用

以酚醛型环氧树脂为原料，合成出低粘度环氧丙烯酸酯(EA)树酯，讨论了环氧树脂类型、催化剂用量等因素对反应及产物性能的影响，并用柔性单体——己内酯改性丙烯酸酯(FAn)替代通常的单官能度单体，对树脂产物进行了涂料配方的研究。     

光固化快速成型材料的合成及光聚合反应研究

以丙烯酸酯化环氧树脂E-51,合成了光固化快速成型的关键材料--光敏树脂.探讨了酯化反应及光聚合机理,用SEM和IR表征了树脂体系的固化结构和固化度.结果表明,酯化反应是环氧基开环、C=C引入的反应;光聚合的机理是C=C裂解、C-C链增长的反应;树脂体系固化后呈不规则体型交联结构;限定其它条件,光引发剂含量为3.5%时,固化度最好.     

水分散多异氰酸酯交联苯乙烯-丙烯酸酯树脂的制备及性能

以苯乙烯、丙烯酸丁酯、N-羟甲基丙烯酰胺、丙烯酰胺为原料,用聚乙烯醇(PVA)作为胶体保护剂,采用无皂乳液聚合方式,制备苯乙烯-丙烯酸酯树脂乳液;以HDI三聚体和聚乙二醇单甲醚(MPEG500)为主要原料制备水可分散聚异氰酸酯.苯乙烯-丙烯酸酯树脂乳液与亲水改性聚异氰酸酯复合,得到水分散多异氰酸酯交联改性的苯乙烯-丙烯...     

Realization of porous poly(methyl methacrylate) films filled with electrodeposited carbon nanotubes

A deposition process on a conducting surface, in which water acted as the dispersed phase and a mixture of poly(methyl methacrylate) and chloroform as the continuous phase, was applied to prepare poly(methyl methacrylate) films. The influence of relative humidity during the film preparation on the surface morphology was investigated by field emission scanning microscopy. High-humidity preparation conditions lead to porous poly(methyl methacrylate) films. These films were then used as templates to perform the selective deposition into the pores of single-walled carbon nanotubes by an electrophoretic method. The attractive properties of carbon nanotubes combined with the versatile properties of poly(methyl methacrylate) open up new opportunities for these nanocomposites to achieve novel architectures in nanodevices and?microdevices.     

Structure and property of electrospun fibrous mat based on polymethacrylate

Poly(butyl methacrylate) was synthesized via suspension polymerization. Poly(butyl methacrylate) solution was prepared by dissolving it in N, N-dimethylformamide. With benzoyl peroxide as an initiator, hydroxyethyl methacrylate as a physical crosslinker and divinylbenzene as a chemical crosslinker, the spinning solution containing a semi-interpenetrating polymer network structure was produced by initiating the polymerization of physical and chemical crosslinkers in the poly(butyl methacrylate) solution. Then, the spinning solution was electrospun into fibrous mat. Finally, contact angle of the surface of the fibrous mat for water or light petroleum was analyzed by a contact angle tester. Thermal property, crystallization behavior, and morphology of the fibrous mat were also characterized through thermogravimetric analyzer, X-ray diffractometer, and field emission scanning electron microscopy. In addition, its oil-absorptive property and capacity to separate oil from water were investigated.     

氟代聚丙烯酸酯的合成与膜形貌及疏水性能

在过氧化苯甲酰作用下,利用甲基丙烯酸十二氟庚酯与丙烯酸丁酯、甲基丙烯酸二甲氨乙酯、丙烯酸羟丙酯的溶液聚合反应合成了一种氟代聚丙烯酸酯(FBDH),用场发射扫描电镜(FESEM)、原子力显微镜(AFM)等对其结构、成膜性及膜形貌进行了研究.结果表明,在观察尺寸为50 nm、扫描范围为5 μm×5μm条件下,观察所合成的F...     

Synthesis and characterization of Cu(II) containing PMMA co-polymer for optical applications

Homogenous, transparent, greenish blue Cu(II) containing PMMA co-polymer disks were prepared through the radical polymerization of the Cu(II) methacrylate, MMA and HMA using AIBN as an initiator. The dependence of the absorbance and transmittance spectra with the Cu(II) methacrylate concentration was investigated in the visible range (420–750 nm). From the transmittance measurements the refractive index and extinction coefficient spectral dependence were calculated by application of an inversion approach. To further characterize this co-polymer a thermogram was performed. The overall behavior of this material suggests its possible use as a standard solution for Spectroscopy Equipment Calibration and as a selective optical filter.     

甲基丙烯酸异冰片酯与甲基丙烯酸甲酯共聚合及聚合物表观性能

研究了甲基丙烯酸异冰片酯与甲基丙烯酸甲酯在 BPO 引发下的共聚合。竞聚率 r_1和 r_2分别为0.91±0.02和0.46±0.01。测试了不同组成共聚物的热、光、力学等性能。     

Preparation and characterization of optical-functional diblock copolymer brushes on hollow sphere surface via atom transfer radical polymerization

The optical-functional poly(methyl methacrylate)-block-Tb complex diblock copolymer brushes grafted from hollow sphere surface via atom transfer radical polymerization were investigated in this work. A sufficient amount of azo initiator was introduced onto hollow sphere surface firstly. Then the monomer methyl methacrylate was polymerized via surface-initiated reverse atom transfer radical polymerization using azo group modified hollow sphere as initiator. Following, the poly(methyl methacrylate) modified hollow sphere was used as maroinitiator for surface-initiated atom transfer radical polymerization of Tb complex. The samples were characterized by Fourier transform infrared spectroscopy, hydrogen nuclear magnetic resonance, gel permeation chromatographer and transmission electron microscopy, respectively. The results indicated that the poly(methyl methacrylate) had grafted from hollow sphere surface and the average diameter of hollow core was about 1 μm. The optical properties of the poly(methyl methacrylate)-block-Tb copolymer modified hollow sphere were also reported.     

Heterocyclic methacrylate-based drug release polymer system

A heterocyclic methacrylate polymer system, developed originally as a low shrinkage polymer system, has been investigated as a drug release polymer and as a biomaterial for encouraging bone or cartilage regeneration. The system is based on poly (ethyl methacrylate) polymer powder mixed with tetrahydrofurfuryl methacrylate monomer and polymerized at room temperature (PEM/THFM). Promising results have been obtained with this biomaterial, and hence its water uptake properties were investigated in detall, in order to throw some light on the release processes that are involved in vivo and in vitro. Water soluble large molecule analogues were incorporated into the system; these additives increased the water uptake of the system. Isobornyl methacrylate was used as a diluent for the monomer to further reduce the water uptake of the system. In all cases the uptake kinetics did not obey simple diffusion theory, the process being very prolonged and complex.     

Stabilizer architectures based on fluorinated random and block copolymers for the dispersion polymerization of 2-hydroxyethyl methacrylate in supercritical carbon dioxide

Different types of stabilizers architectures based on copolymers composed of hydrophilic components and CO₂-philic fluorinated acrylate groups were investigated for the free radical dispersion polymerization of 2-hydroxyethyl methacrylate (HEMA) at 65 °C in supercritical carbon dioxide (scCO₂). Four categories of random and block copolymeric stabilizers consisting of 1H,1H,2H,2H-perfluorooctyl methacrylate (FOMA), oligo(ethylene glycol) methacrylate (OEGMA), dimethyl amino ethyl methacrylate (DMAEMA), and ethylene oxide (EO) were selected as stabilizers for HEMA. The effect of the stabilizer architecture on the polymerization results was investigated in terms of stabilizer concentration, the nature of the hydrophilic anchor groups, and block versus random copolymers. White free-flowing poly(HEMA) powders in high yield were obtained with all stabilizers. While the monomer conversion was independent, the morphology of particles was found to be considerably affected by the nature of the stabilizers.     

Synthesis of calcium carbonate vaterite crystals and their effect on stabilization of suspension polymerization of MMA

Spherical calcium carbonate vaterite crystals were synthesized and the effect of them on stabilization of suspension polymerization of methyl methacrylate was investigated. Suspension polymerization of methyl methacrylate could be stabilized with calcium carbonate vaterite crystals and sodium dodecylbenzene sulfonate of the concentrations from 25 to 100 ppm. Poly(methyl methacrylate) beads coated with spherical calcium carbonate vaterite crystals were prepared. With an increase in the concentration of sodium dodecylbenzene sulfonate from 25 to 100 ppm, the amount of calcium carbonate vaterite crystals adhered on the surface of poly methyl methacrylate bead increased and the mean diameters of the polymer beads decreased.     

磁性Fe_3O_4@离子印迹聚(MMA-HPMA-DVB)复合材料的合成及其对水中Ni(Ⅱ)选择性吸附

采用超声协助悬浮聚合法以Ni(Ⅱ)离子为模板制备了氨基功能化纳米Fe_3O_4-离子印迹聚(甲基丙烯酸甲酯(MMA)-3-(2-氨基乙基胺)-2-甲基丙烯酸羟丙酯(HPMA)-二乙烯基苯(DVB))磁性复合材料(Fe_3O_4@ion imprinted poly(MMA-HPMA-DVB),Fe_3O_4@IIP(MMA-HPMA-DVB))。通过EA、XRD、FTIR、TEM、VSM等手段对Fe_3O_4@IIP(MMA-HPMA-DVB)的组成、结构、形貌、磁性等进行了表征,并研究了其吸附水中Ni(Ⅱ)的性能。结果表明:合成的Fe_3O_4@IIP(MMA-HPMA-DVB)平均粒径为100nm,饱和磁化强度为43.8emu/g;共聚单体甲基丙烯酸甲酯(MMA)的羰基通过氢键与Fe_3O_4表面羟基结合,有利于Fe_3O_4@IIP(MMA-HPMA-DVB)的核-壳结构的形成与稳定;Fe_3O_4@IIP(MMA-HPMA-DVB)对Ni(Ⅱ)的吸附受溶液pH值影响较小;等温吸附线符合Langmuir模型,饱和吸附量(q_(m,c)=500 mg/g,q_(m,e)=478 mg/g)高于非离子印迹材料(Fe_3O_4@none-ion imprinted poly(MMA-HPMA-DVB),Fe_3O_4@NIP(MMA-HPMA-DVB)),q_(m,c)=90.9mg/g,q_(m,e)=83.8mg/g)。吸附过程可在5min内达到平衡,符合准二级动力学模型。Fe_3O_4@IIP(MMA-HPMA-DVB)能高选择性地有效吸附水中Ni(Ⅱ),对Ni(Ⅱ)的印迹因子(α)为1.9,对几种常见共存离子的选择性因子(β)7.7,是潜在的高选择性吸附和回收Ni(Ⅱ)的功能材料。