Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers
Toughened epoxy has been widely used in industrial areas such as automotive and electronics. In this study, nanosized hyperbranched polymers (HBPs) as a flexibilizer are synthesized and embedded into epoxy resin to enhance the toughness and flexibility. Two different HBPs, hyperbranched poly(methyla...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2021/9984174 |
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| author | Hangyu Park Youngson Choe |
| author_facet | Hangyu Park Youngson Choe |
| author_sort | Hangyu Park |
| collection | DOAJ |
| description | Toughened epoxy has been widely used in industrial areas such as automotive and electronics. In this study, nanosized hyperbranched polymers (HBPs) as a flexibilizer are synthesized and embedded into epoxy resin to enhance the toughness and flexibility. Two different HBPs, hyperbranched poly(methylacrylate-diethanolamine) (poly(MA-DEA)) and poly(methylacrylate- ethanolamine) (poly(MA-EA)), were prepared and blended with both epoxy and polyetheramine, a curing agent. The molecular size of HBPs was estimated to be 6 ~ 14 nm in diameter. The molecular weight of HBPs ranges from 1500(1.5 K) to 7000(7.0 K) g/mol. In cured epoxy/HBP blends, no phase separations are occurred, indicating that HBPs possess sufficient miscibility with epoxy. The tensile toughness of the blends increased with changing the molecular weight of HBPs without sacrificing tensile strengths. The impact strength of the blends increases stiffly until the loading % of HBPs in the blends reaches 10 wt%. In addition, the experimental studies showed that impact resistance also increased with an increase in molecular weight of HBPs. The obtained impact resistance of the epoxy/HBP blends with 10 wt% was 270% more effective compared to that of cured neat epoxy. |
| format | Article |
| id | doaj-art-46f464a1efbd4c5ea46c273de434fed2 |
| institution | Kabale University |
| issn | 1687-9430 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-46f464a1efbd4c5ea46c273de434fed22025-08-20T03:36:45ZengWileyInternational Journal of Polymer Science1687-94302021-01-01202110.1155/2021/9984174Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched PolymersHangyu Park0Youngson Choe1Department of Polymer Science and Chemical EngineeringDepartment of Polymer Science and Chemical EngineeringToughened epoxy has been widely used in industrial areas such as automotive and electronics. In this study, nanosized hyperbranched polymers (HBPs) as a flexibilizer are synthesized and embedded into epoxy resin to enhance the toughness and flexibility. Two different HBPs, hyperbranched poly(methylacrylate-diethanolamine) (poly(MA-DEA)) and poly(methylacrylate- ethanolamine) (poly(MA-EA)), were prepared and blended with both epoxy and polyetheramine, a curing agent. The molecular size of HBPs was estimated to be 6 ~ 14 nm in diameter. The molecular weight of HBPs ranges from 1500(1.5 K) to 7000(7.0 K) g/mol. In cured epoxy/HBP blends, no phase separations are occurred, indicating that HBPs possess sufficient miscibility with epoxy. The tensile toughness of the blends increased with changing the molecular weight of HBPs without sacrificing tensile strengths. The impact strength of the blends increases stiffly until the loading % of HBPs in the blends reaches 10 wt%. In addition, the experimental studies showed that impact resistance also increased with an increase in molecular weight of HBPs. The obtained impact resistance of the epoxy/HBP blends with 10 wt% was 270% more effective compared to that of cured neat epoxy.http://dx.doi.org/10.1155/2021/9984174 |
| spellingShingle | Hangyu Park Youngson Choe Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers International Journal of Polymer Science |
| title | Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers |
| title_full | Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers |
| title_fullStr | Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers |
| title_full_unstemmed | Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers |
| title_short | Enhancing Toughness and Impact Strength of Epoxy Resins by Using Hyperbranched Polymers |
| title_sort | enhancing toughness and impact strength of epoxy resins by using hyperbranched polymers |
| url | http://dx.doi.org/10.1155/2021/9984174 |
| work_keys_str_mv | AT hangyupark enhancingtoughnessandimpactstrengthofepoxyresinsbyusinghyperbranchedpolymers AT youngsonchoe enhancingtoughnessandimpactstrengthofepoxyresinsbyusinghyperbranchedpolymers |