Analysis of Raman spectra of water in 2-hydroxyethyl acrylates hydrogels crosslinked by polyethylene glycol dimethacrylate

作者：Guo XL^*; Chen GQ; Li FM; Zhang SL

来源：Acta Polymerica Sinica, 2000, (5): 659-662.

• Raman spectra
• hydrogels
• collective hand
• relative intensity of collective band
• defect probability
• equilibrium water content

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 -CH2OCH2- in the PEGDMA-16 to the hydrogen-bond defect of water than that of -OH in HEA and HEMA.

• 出版日期2000-10
• 单位北京大学