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首页> 外文期刊>Journal of Applied Polymer Science >Polypyrrole-vinyl aniline modified cyclohexanone formaldehyde resin copolymers: a comparative study of the resin preparation
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Polypyrrole-vinyl aniline modified cyclohexanone formaldehyde resin copolymers: a comparative study of the resin preparation

机译：聚吡咯-乙烯基苯胺改性的环己酮甲醛树脂共聚物：树脂制备的比较研究

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In this study, the synthesis of polypyrrole-b-vinyl aniline modified cyclohexanone formaldehyde resin (PPy-b-CFVAnR) block copolymers by a combination of condensation polymerization and chemical oxidative polymerization processes was examined. First, a cyclohexanone formaldehyde resin containing vinyl aniline units [4- vinyl aniline modified cyclohexanone formaldehyde resin (CFVAnR)] was prepared by a direct condensation reaction of 4-vinyl aniline and cyclohexanone with formaldehyde in an in situ modification reaction. CFVAnR and pyrrole (Py) were then used with a conventional method of in situ chemical oxidative polymerization. The reactions were carried out with heat-activated potassium persulfate salt in the presence of p-toluene sulfonic acid in a dimethyl sulfoxide-water binary solvent system; this led to the formation of desired block copolymers. The effects of the oxidant-monomer molar ratio, dopant existence, addition order of the reactants, and reaction temperature on the yield, conductivity, and morphology of the resulting products were investigated. PPy-b-CFVAnR copolymers prepared with a resin-to-Py molar ratio of 1:40 showed conductivity in the range 3.7 x 10(-1) to 3.8 x 10(-2) S/cm. Oxidant-to-Py molar ratios of 0.5 and 1.0 were proposed to be the optimum stoichiometries for higher conductivity and yield, respectively, of the copolymer. The morphology of the copolymer (PPy-b-CFVAnR) was investigated with environmental scanning electron microscopy analyses. The results indicate that the surface of the copolymer was composed of well-distributed nanospheres with average particle diameters of 60-85 nm. Also, the synthesized PPy-b-CFVAnR had a higher thermal stability than the pure CFVAnR. The chemical composition and structure of the PPy-b-CFVAnR copolymers were characterized by Fourier transform infrared spectroscopy and measurement. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 132, 42841.
机译：在这项研究中，通过缩聚和化学氧化聚合工艺的结合，研究了聚吡咯-b-乙烯基苯胺改性的环己酮甲醛树脂（PPy-b-CFVAnR）嵌段共聚物的合成。首先，通过在原位改性反应中使4-乙烯基苯胺和环己酮与甲醛直接缩合反应来制备含有乙烯基苯胺单元的环己酮甲醛树脂[4-乙烯基苯胺改性的环己酮甲醛树脂（CFVAnR）]。然后将CFVAnR和吡咯（Py）与常规的原位化学氧化聚合方法一起使用。反应是在对甲苯磺酸存在下，在二甲基亚砜-水二元溶剂体系中，用热活化的过硫酸钾盐进行的。这导致形成所需的嵌段共聚物。研究了氧化剂-单体的摩尔比，掺杂剂的存在，反应物的添加顺序和反应温度对所得产物的产率，电导率和形态的影响。以树脂与Py的摩尔比为1:40制备的PPy-b-CFVAnR共聚物的电导率范围为3.7 x 10（-1）至3.8 x 10（-2）S / cm。提出氧化剂与Py的摩尔比为0.5和1.0是分别对于共聚物的更高电导率和产率的最佳化学计量。通过环境扫描电子显微镜分析研究了共聚物（PPy-b-CFVAnR）的形态。结果表明，共聚物的表面由分布均匀的纳米球组成，平均粒径为60-85 nm。同样，合成的PPy-b-CFVAnR具有比纯CFVAnR高的热稳定性。通过傅立叶变换红外光谱和测量对PPy-b-CFVAnR共聚物的化学组成和结构进行了表征。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，132，42841。

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