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首页> 外文期刊>Journal of coatings technology and research >Thermal and photocuring of an acrylate-based coating resin reinforced with nanosilica particles
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Thermal and photocuring of an acrylate-based coating resin reinforced with nanosilica particles

机译：纳米二氧化硅颗粒增强的丙烯酸酯基涂料树脂的热固化和光固化

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摘要

A macromonomer, l,3-bis[(2-hydroxy-3-acrylate)propyloxy]2-hydroxypropane (BHAPP) was prepared by the reaction of acrylic acid with diglycerol diglycidyl ether (DGE) in the presence of triethyl amine as a catalyst. The progress of the reaction was followed by measuring the decrease in intensity of the epoxide absorption peak at 915 cm~(-1), and structure of BHAPP was characterized by FTIR and ~1H NMR spectroscopy. The effect of nanosilica (NS) particles as catalyst on thermal and photocuring of BHAPP was studied. The photopolymerization was carried out with the visible light using camphorquinone and N,N-dimethylami-noethylmethacrylate (DMAEM) as the photoinitiating system. The kinetic parameters of thermal curing were obtained using nonisothermal differential scanning calorimeter (DSC), and the data indicated that NS particles catalyzed the cure reaction by shifting the exothermic peak toward lower temperatures, decreasing the activation energy (E_a), and increasing the rate constant value. The absorption properties of the cured nanocomposites were also studied in different exposure conditions.
机译：在三乙胺作为催化剂存在下，丙烯酸与二甘油二缩水甘油醚（DGE）反应，制得大分子单体1,3-双[（2-羟基-3-丙烯酸）丙氧基] 2-羟基丙烷（BHAPP）。 。通过测量在915cm〜（-1）处的环氧吸收峰强度的降低来跟踪反应的进行，并通过FTIR和〜1H NMR光谱对BHAPP的结构进行表征。研究了纳米二氧化硅（NS）作为催化剂对BHAPP的热固化和光固化的影响。使用樟脑醌和甲基丙烯酸N，N-二甲基氨基-乙基乙基酯（DMAEM）作为光引发体系，在可见光下进行光聚合。使用非等温差示扫描量热仪（DSC）获得了热固化的动力学参数，数据表明NS颗粒通过将放热峰移至较低温度，降低活化能（E_a）和增加速率常数来催化固化反应。值。还研究了固化纳米复合材料在不同暴露条件下的吸收性能。

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