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首页> 外文期刊>Journal of Applied Polymer Science >Covalently bound organomodified clay photoinitiators
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Covalently bound organomodified clay photoinitiators

机译：共价键合的有机改性粘土光引发剂

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While organomodified clays are property enhancing additives for composite materials, much of the research thereof has focused on intercalated quaternary ammonium compounds; however, herein the effects of covalently bound organomodified clays (CoBOCs) are explored with particular emphasis on CoBOC photoinitiators. Two commercially available alcoholic photoinitiators (1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1-phenylpropanone) were reacted with isophorone diisocyanate to form half-adducts and then reacted with Cloisite 93A, an organophilic montmorillonite clay, to form two CoBOC photoinitiators. The CoBOC photoinitiators were integrated into a standard formulation and subsequently ultraviolet (UV) cured. Property characterization thereof (e.g., adhesion, hardness, and flexibility) yielded unchanged or increased properties with the exception of impact flexibility. Finally, the CoBOC photoinitiators were kinetically characterized via photo-differential scanning calorimetry (photo-DSC) within 1,6-hexanediol diacrylate (HDODA). While increasing concentrations of clay additives generally decrease polymerization rates, increasing concentrations of the CoBOC photoinitiators exhibited increased polymerization rates. Therefore, the CoBOC photoinitiators can enhance the polymerization kinetics and physical properties of UV-curable coatings. (C) 2015 Wiley Periodicals, Inc.
机译：尽管有机改性粘土是复合材料的性能增强添加剂，但其许多研究都集中在插层式季铵化合物上。然而，在本文中探索了共价键合的有机改性粘土（CoBOC）的作用，其中特别着重于CoBOC光引发剂。使两种市售的醇类光引发剂（1-羟基环己基苯基酮和2-羟基-2-甲基-1-苯基丙烷）与异佛尔酮二异氰酸酯反应形成半加合物，然后与Cloisite 93A（一种亲有机的蒙脱土）反应，形成两种CoBOC光引发剂。将CoBOC光引发剂整合到标准配方中，然后进行紫外线（UV）固化。其性质表征（例如，粘合性，硬度和挠性）产生了除冲击挠性以外不变或增加的性质。最后，通过在1，6-己二醇二丙烯酸酯（HDODA）中的光差扫描量热法（photo-DSC）对CoBOC光引发剂进行了动力学表征。尽管增加粘土添加剂的浓度通常会降低聚合速率，但是增加CoBOC光引发剂的浓度则显示出聚合速率的提高。因此，CoBOC光引发剂可以增强UV固化涂料的聚合动力学和物理性能。 （C）2015年Wiley Periodicals，Inc.

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