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Title: Raman spectroscopy of 2-hydroxyethyl methacrylate-acrylamide copolymer using gamma irradiation for crosslinking

Abstract

A copolymer hydrogel was made by mixing acrylamide and 2-hydroxyethyl methacrylate monomers in water and polymerizing with gamma irradiation. The progress of polymerization and the vibrational structure of the hydrogel was examined using Raman spectroscopy. Raman spectra indicated that the co-polymer has a molecular structure different from polyacrylamide or the individual monomers. The Raman data also indicate the presence of crosslinking at the C=O, NH2 and OH side chains. The spectra further suggest the continuous lengthening of the backbone of the polymers with increasing gamma dose. This is shown as the increase in C-C modes as C=C vibrations decrease. Raman spectra changed most dramatically as the monomer mixture became a gel at a dose of approximately 320 Gy. Spectral differences were subtler with doses exceeding 640 Gy, although chain lengthening continued beyond 1500 Gy. Potential applications of the copolymer hydrogel include reconstructive tissue as well as a standard material for radiation protection dosimetry. Results are discussed in relation to other potential applications of this polymer and dose-dependent changes in the Raman spectrum.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
944779
Report Number(s):
PNNL-SA-46762
TRN: US0900586
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Raman Spectroscopy, 37(11):1248-56; Journal Volume: 37; Journal Issue: 11
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACRYLAMIDE; COPOLYMERS; HYDROGELS; GAMMA RADIATION; CROSS-LINKING; IRRADIATION; METHACRYLATES; MOLECULAR STRUCTURE; RAMAN SPECTRA; hydrogel; polymer; vibrational spectroscopy; structure; phantom standard; radiation

Citation Formats

Goheen, Steven C., Saunders, Rachel M., Davis, Rachel M., Harvey, Scott D., and Olsen, Peter C. Raman spectroscopy of 2-hydroxyethyl methacrylate-acrylamide copolymer using gamma irradiation for crosslinking. United States: N. p., 2006. Web. doi:10.1002/jrs.1543.
Goheen, Steven C., Saunders, Rachel M., Davis, Rachel M., Harvey, Scott D., & Olsen, Peter C. Raman spectroscopy of 2-hydroxyethyl methacrylate-acrylamide copolymer using gamma irradiation for crosslinking. United States. doi:10.1002/jrs.1543.
Goheen, Steven C., Saunders, Rachel M., Davis, Rachel M., Harvey, Scott D., and Olsen, Peter C. Sat . "Raman spectroscopy of 2-hydroxyethyl methacrylate-acrylamide copolymer using gamma irradiation for crosslinking". United States. doi:10.1002/jrs.1543.
@article{osti_944779,
title = {Raman spectroscopy of 2-hydroxyethyl methacrylate-acrylamide copolymer using gamma irradiation for crosslinking},
author = {Goheen, Steven C. and Saunders, Rachel M. and Davis, Rachel M. and Harvey, Scott D. and Olsen, Peter C.},
abstractNote = {A copolymer hydrogel was made by mixing acrylamide and 2-hydroxyethyl methacrylate monomers in water and polymerizing with gamma irradiation. The progress of polymerization and the vibrational structure of the hydrogel was examined using Raman spectroscopy. Raman spectra indicated that the co-polymer has a molecular structure different from polyacrylamide or the individual monomers. The Raman data also indicate the presence of crosslinking at the C=O, NH2 and OH side chains. The spectra further suggest the continuous lengthening of the backbone of the polymers with increasing gamma dose. This is shown as the increase in C-C modes as C=C vibrations decrease. Raman spectra changed most dramatically as the monomer mixture became a gel at a dose of approximately 320 Gy. Spectral differences were subtler with doses exceeding 640 Gy, although chain lengthening continued beyond 1500 Gy. Potential applications of the copolymer hydrogel include reconstructive tissue as well as a standard material for radiation protection dosimetry. Results are discussed in relation to other potential applications of this polymer and dose-dependent changes in the Raman spectrum.},
doi = {10.1002/jrs.1543},
journal = {Journal of Raman Spectroscopy, 37(11):1248-56},
number = 11,
volume = 37,
place = {United States},
year = {Sat Feb 18 00:00:00 EST 2006},
month = {Sat Feb 18 00:00:00 EST 2006}
}