| Simultaneously Enhanced Cryogenic Tensile Strength,Ductility and Impact Resistance of Epoxy Resins by Polyethylene Glycol简 |
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| 作者姓名： | Q.Feng J. Yang Y. Liu H. Xiao S. Fu |
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| 基金项目： | support of the National Natural Science Foundation of China(Nos. 51073169,10972216 and 11002141) |
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| 摘 要： | Rubbers have been well accepted for modifying brittle epoxies but rubber modified epoxies usually posses lowered tensile strength though enhanced ductility and fracture resistance. In this work, a polyethylene glycol （PEG-4000） is used to modify diglycidyl ether of bisphenol A/methyltetrahydrophthalic anhydride system for enhancing cryogenic tensile strength, ductility and impact resistance. The results display that the cryogenic tensile strength, ductility （failure strain） and fracture resistance （impact strength） are all enhanced for the modified epoxy system at proper PEG contents. The maximum tensile strength （127.8 MPa） at the cryogenic temperature （77 K） with an improvement of 30.1% is observed for the modified system with the 15 wt% PEG content. The ductility and impact resistance at both room temperature and cryogenic temperature are all improved for the modified epoxy system with proper PEG-4000 contents. These observations are explained by the positron annihilation lifetime spectroscopy results and scanning electron microscopy results. Moreover, the glass transition temperature decreases slightly with increasing PEG content.
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| 关 键 词： | 改性环氧树脂 拉伸强度 耐冲击性 聚乙二醇 延展性 低温 正电子湮没寿命谱 玻璃化转变温度 |
| 收稿时间： | 2 April 2012 |
Simultaneously Enhanced Cryogenic Tensile Strength,Ductility and Impact Resistance of Epoxy Resins by Polyethylene Glycol |
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| Q.Feng,J. Yang,Y. Liu,H. Xiao,S. Fu.Simultaneously Enhanced Cryogenic Tensile Strength,Ductility and Impact Resistance of Epoxy Resins by Polyethylene Glycol[J].Journal of Materials Science & Technology,2014,30(1):90-96. |
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| Authors: | Qingping Feng Jiaoping Yang Yu Liu Hongmei Xiao Shaoyun Fu |
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| Affiliation: | Technical Institute Of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Rubbers have been well accepted for modifying brittle epoxies but rubber modified epoxies usually posses lowered tensile strength though enhanced ductility and fracture resistance.In this work,a polyethylene glycol(PEG-4000) is used to modify diglycidyl ether of bisphenol A/methyltetrahydrophthalic anhydride system for enhancing cryogenic tensile strength,ductility and impact resistance.The results display that the cryogenic tensile strength,ductility(failure strain) and fracture resistance(impact strength) are all enhanced for the modified epoxy system at proper PEG contents.The maximum tensile strength(127.8 MPa) at the cryogenic temperature(77 K) with an improvement of 30.1%is observed for the modified system with the 15 wt%PEG content.The ductility and impact resistance at both room temperature and cryogenic temperature are all improved for the modified epoxy system with proper PEG-4000 contents.These observations are explained by the positron annihilation lifetime spectroscopy results and scanning electron microscopy results.Moreover,the glass transition temperature decreases slightly with increasing PEG content. |
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| Keywords: | Epoxy resin Modification Polymer composite Tensile strength |
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