期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 216, 期 8, 页码 856-872出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201400506
关键词
chain transfer reaction; chemical miscibility; crosslinking structure; dynamical mechanical property; free-radical; cationic ring-opening hybrid polymerization; photopolymerization; polymerization kinetics
资金
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD [R01 DE022054, R01 DE022054-04S1]
The effects of polymerization kinetics and chemical miscibility on the crosslinking structure and mechanical properties of polymers cured by visible-light initiated free-radical/cationic ring-opening hybrid photopolymerization are determined. A three-component initiator system is used and the monomer system contains methacrylates and epoxides. The photopolymerization kinetics is monitored in situ by Fourier transform infrared-attenuated total reflectance. The crosslinking structure is studied by modulated differential scanning calorimetry and dynamic mechanical analysis. X-ray microcomputed tomography is used to evaluate microphase separation. The mechanical properties of polymers formed by hybrid polymerization are comparable to the control formed by free-radical polymerization. These investigations mark the first time that the benefits of the chain transfer reaction between epoxy and hydroxyl groups of methacrylate, on the crosslinking network and microphase separation during hybrid visible-light initiated photopolymerization, have been determined.
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