Effect of reactive poly(ethylene glycol) flexible chains on curing kinetics and impact properties of bisphenol‐a glycidyl ether epoxy |
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| Authors: | Dahu Yao Tapas Kuila Kyung‐Bok Sun Nam‐Hoon Kim Joong‐Hee Lee |
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| Affiliation: | 1. BIN Fusion Research Team, Department of Polymer and Nano Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561‐756, Korea;2. College of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang 471003, Peoples' Republic of China;3. Department of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561‐756, Korea;4. WCU Program, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, 561‐756, Korea |
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| Abstract: | Bisphenol‐A glycidyl ether epoxy resin was modified using reactive poly(ethylene glycol) (PEO). Dynamic mechanical analysis showed that introducing PEO chains into the structure of the epoxy resin increased the mobility of the molecular segments of the epoxy network. Impact strength was improved with the addition of PEO at both room (RT) and cryogenic (CT, 77 K) temperature. The curing kinetics of the modified epoxy resin with polyoxypropylene diamines was examined by differential scanning calorimetry (DSC). Curing kinetic parameters were determined from nonisothermal DSC curves. Kinetic analysis suggested that the two‐parameter autocatalytic model suitably describes the kinetics of the curing reaction. Increasing the reactive PEO content decreased the heat flow of curing with little effect on activation energy (Ea), pre‐exponential factor (A), or reaction order (m and n). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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| Keywords: | toughness modification differential scanning calorimetry mechanical properties |
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