不同官能度单体对丙烯酸酯紫外光固化材料表面能的影响  

Influence of monomers on surface energy of UV cured acrylates

作　　者：骆燕[1] 王德海[1] 蔡延庆[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,杭州310014

出　　处：《辐射研究与辐射工艺学报》2006年第5期283-288,共6页Journal of Radiation Research and Radiation Processing

基　　金：浙江省自然科学基金(Z503236)资助

摘　　要：考察了不同种类单体稀释剂及其用量对紫外光固化涂膜表面能的影响。对固化材料进行表面能测定,用衰减全反射-傅立叶变换红外光谱(Attenuatedtotalreflectance–Fouriertransforminfraredspectroscopy,ATR-FTIR)表征。结果表明:固化层表面能与组分的化学结构密切相关,几种三官能团单体中,含有9-乙氧基-三羟甲基丙烷三丙烯酸酯(Ethoxylated(9)trimethylolpropanetriacrylate,9EOTMPTA)的固化膜表面能最大,含丙氧基三羟甲基丙烷三丙烯酸酯(Propoxylated(3)trimethylolpropanetriacrylate,POTMPTA)的最小。9EOTMPTA分子中所含的醚键较多,而POTMPTA分子中甲基含量较多。ATR-FTIR分析也表明:含有9EOTMTPA的固化膜表面的醚键含量要多于含有POTMPTA的固化膜。固化膜的表面能还与所含单体自身的表面张力成正比关系,单体表面张力越大,其固化膜表面能也越大,反之亦然。随着体系中三官能团单体TMPTA、POTMPTA和9EOTMOTA用量的增加,固化膜的表面能下降。双官能团单体HDDA和TPGDA的加入使固化膜的表面能比只含三官能团单体时的材料表面能要小。The influence of various monomers on the surface energy of the UV cured films was investigated. The results show that： chemical nature of the monomers affects different surface energy of the films. The value of surface energy for the film containing 9EOTMPTA is the highest, whereas the film containing POTMPTA has the lowest value among four investigated tri-functional monomers. 9EOTMPTA has relatively higher content of ether groups, and POTMPTA has more methyl groups. ATR-PTIR analysis also indicates that the content of ether groups on the film surface which contains 9EOTMPTA is higher than that containing POTMPTA. And the results of surface energy of the films agree with the surface tension of the monomers. That is the higher surface tension of the monomer, the higher surface energy of the film, and vice versa. Besides, the surface energy of the films drops when the dosage of the tri-functional monomers increases. It is also found that the bifunctional monomers decrease the surface energy of the films.

关 键 词：单体 表面能 极性 官能团 衰减全反射-傅立叶变换红外光谱 

分 类 号：TQ314.22[化学工程—高聚物工业] TB303[一般工业技术—材料科学与工程]