Facile modification on the oxygen‐inhibited layer of photopolymerized acrylates via aza‐Michael addition,Polymer International

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Facile modification on the oxygen‐inhibited layer of photopolymerized acrylates via aza‐Michael addition
Polymer International ( IF 2.9 ) Pub Date : 2021-01-09 , DOI: 10.1002/pi.6174
Junyi Zhou _{1,

2} , Xavier Allonas ₂ , Xiaoxuan Liu ₁ , Shanghua Wu ₃

Affiliation

In free radical UV curing, the inhibition of the photopolymerization reaction by oxygen leaves in most cases a considerable amount of acryl groups on the surface of cured materials. In the work reported, advantage was taken of the residual acryl CC double bonds as reactive sites for aza‐Michael addition in order to proceed to surface modification. A formulation composed of bisphenol A acrylate and trimethylolpropane triacrylate was cured under UV‐LED (λ = 405 nm) and the oxygen‐inhibited surface was modified by aza‐Michael addition using several amino compounds such as tris(hydroxymethyl)methylaminomethane, amino‐polydimethylsiloxane and amino acids. The conversion of acryl CC double bonds and the content of functional groups on the surface were measured using Fourier transform infrared and X‐ray photoelectron spectroscopies and confocal Raman microscopy. After modification, the surfaces of samples exhibited diverse hydrophilicity and affinity to aqueous acid/alkali. © 2021 Society of Chemical Industry

中文翻译：

通过氮杂-迈克尔加成反应轻松改性光聚合丙烯酸酯的氧抑制层

在自由基UV固化中，在大多数情况下，氧气对光聚合反应的抑制在固化材料的表面上留下大量的丙烯酸基团。在报告的工作中，利用残留的丙烯酸CC双键作为氮杂-迈克尔加成的反应位点，以便进行表面改性。双酚A丙烯酸酯和三羟甲下UV-LED固化（组成的制剂，λ= 405 nm），然后使用几种氨基化合物（例如三（羟甲基）甲基氨基甲烷，氨基聚二甲基硅氧烷和氨基酸）通过aza-Michael加成对氧抑制表面进行修饰。使用傅立叶变换红外和X射线光电子能谱和共聚焦拉曼显微镜测量丙烯酸CC双键的转化率和表面官能团的含量。改性后，样品表面对酸/碱水溶液表现出不同的亲水性和亲和力。©2021化工协会

更新日期：2021-01-09

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