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以双甲基丙烯酸乙二醇酯类为交联剂的丙烯酸β-羟乙酯类水凝胶中水的拉曼光谱学研究
ANALYSIS OF RAMAN SPECTRA OF WATER IN 2-HYDROXYETHYL ACRYLATES HYDROGELS CROSSLINKED BY POLYETHYLENE GLYCOL DIMETHACRYLATE
【Abstract】 A Raman spectroscopic study on the hydrogen\|bond defect of water in 2\|hydroxyethyl (meth)acrylate hydrogels crosslinked by ethylene glycol dimethacrylate (EGDMA) and polyethylene glycol dimethacrylates were undertaken.It was found that PEGDMA 16 possessed a different behavior on the hydrogen\|bond defect from EGDMA and PEGDMA 9.That is,the extents of hydrogen\|bond defect for EGDMA and PEGDMA 9 decreased with the increase of crosslinking density,whereas for PEGDMA 16,as the crosslinking density is bigger than a certain value,the hydrogenbond defect is increased with the increase of crosslinking density.This is caused by the weaker effect of —CH 2OCH 2— in the PEGDMA 16 to the hydrogen\|bond defect of water than that of —OH in HEA and HEMA.
【Key words】 Raman spectra; Hydrogels; Collective hand; Relative intensity of collective band; Defect probability; Equilibrium water content;
- 【文献出处】 高分子学报 ,ACTA POLYMERICA SINICA , 编辑部邮箱 ,2000年05期
- 【分类号】O632
- 【被引频次】4
- 【下载频次】296