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首页> 外文期刊>Journal of Applied Polymer Science >Copolymerization of 4-Chlorophenyl Acrylate with Methyl Acrylate: Synthesis, Characterization, Reactivity Ratios, and Their Applications in the Leather Industry
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Copolymerization of 4-Chlorophenyl Acrylate with Methyl Acrylate: Synthesis, Characterization, Reactivity Ratios, and Their Applications in the Leather Industry

机译：4-氯苯基丙烯酸酯与丙烯酸甲酯的共聚合：合成，表征，反应比及其在皮革工业中的应用

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4-Chlorophenyl acrylate (CPA) was prepared by reacting 4-chlorophenol and acryloyl chloride in the presence of triethylamine in ethyl acetate solution. Poly(4-chlorophenyl acrylate) and copoly(4-chlorophenyl acrylate-methyl acrylate) were synthesized by the free radical polymerization in ethyl acetate at 70deg C. All the polymers were characterized by infrared (IR) and nuclear magnetic resonance (NMR) spectroscopic techniques. The composition of the copolymers was determined by the ~1H-NMR spectroscopic technique, that is, by integrating the aromatic peaks corresponding to the 4-chlorophenyl acrylate unit against the carbomethoxy group in the methyl acrylate unit. The reactivity ratios were calculated by Fieman-Ross, Kelen-Tudos (K-T), and the extended Kelen-Tudos methods. Teh values of r_1 and r_2 obtained by these methods were in close agreement with each other; that is, r_1(CPA) = 0.64 and r_2(MA) = 0.13 by the K-T method. The number-average molecular weigh (M_n = 1.55 × 10~3, the weight-average molecular weight (M_w = 8.39 × 10~3), and the polydispersity index (M_w/M_n = 5.42) of poly(CPA) were determined by gel permeation chromatography (GPC). Thermal properties of the polymers were studied in a nitrogen atmosphere using thermogravimetric analysis (TGA). As the CPA increases in hte copolymer, thermal stability of the copolymer increases (e.g., 90% weight loss occurs at 480deg C for 20 mol % CPA, whereas the same weight loss occurs at 571deg C for 80 mol % CPA). Acrylic binders, based on the CPA-MA-BA terpolymer, of different glass transition temperatures were prepared for applications in leather industry as top coat and base coat materials. These acrylic emulsions were cast into thin films, and their characteristics were tested for physical properties. These acrylic emulsions were applied as a base coat on leather, and teh compositions having T_g values of 1.08 and 9.25deg C were found to have excellent properties as base coats for leather when compared with commercial samples.
机译：通过使4-氯苯酚和丙烯酰氯在三乙胺存在下于乙酸乙酯溶液中反应来制备丙烯酸4-氯苯酯（CPA）。在70℃的乙酸乙酯中通过自由基聚合反应合成了聚（4-氯苯基丙烯酸酯）和共聚（丙烯酸4-氯苯基酯-丙烯酸甲酯）。所有聚合物均通过红外（IR）和核磁共振（NMR）光谱表征技术。共聚物的组成通过〜1 H-NMR光谱技术确定，即，通过将对应于丙烯酸4-氯苯基酯单元的芳族峰与丙烯酸甲酯单元中的碳甲氧基进行积分。通过Fieman-Ross，Kelen-Tudos（K-T）和扩展的Kelen-Tudos方法计算反应率。通过这些方法获得的r_1和r_2的Teh值彼此非常一致;即，通过K-T方法，r_1（CPA）= 0.64和r_2（MA）= 0.13。聚（CPA）的数均分子量（M_n = 1.55×10〜3，重均分子量（M_w = 8.39×10〜3），多分散指数（M_w / M_n = 5.42）通过凝胶渗透色谱法（GPC）。在氮气气氛中使用热重分析（TGA）研究了聚合物的热性能。随着共聚物中CPA的增加，共聚物的热稳定性也随之增加（例如，在480°C时发生90％的重量损失） CPA为20 mol％的CPA，而571℃失重为80 mol％的CPA。）基于CPA-MA-BA三元共聚物，制备了具有不同玻璃化温度的丙烯酸粘合剂，用于皮革工业中作为面漆将这些丙烯酸乳液乳化成薄膜，并测试其特性的物理性能，将这些丙烯酸乳液作为底漆施涂在皮革上，发现其T_g值为1.08和9.25℃。表现出色与商业样品相比，具有作为皮革底涂层的特性。

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