Study on direct-chain diacid modified phenolic resin for Al-alloy casting
Resin coated sand (RCS) with phenolic resin matrix can hardly be collapsed when it is used in Al-alloy casting. Adding collapsing agent and reducing the concentration of resin are solutions adopted by workers, but these methods tend to reduce the initial strength of RCS. Synthesis of modified phenol...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Foundry Journal Agency
2005-02-01
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| Series: | China Foundry |
| Subjects: | |
| Online Access: | http://www.foundryworld.com/uploadfile/20094857966281.pdf |
| _version_ | 1819123559135444992 |
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| author | Yundong JI Jirong LUO Moyin LI |
| author_facet | Yundong JI Jirong LUO Moyin LI |
| author_sort | Yundong JI |
| collection | DOAJ |
| description | Resin coated sand (RCS) with phenolic resin matrix can hardly be collapsed when it is used in Al-alloy casting. Adding collapsing agent and reducing the concentration of resin are solutions adopted by workers, but these methods tend to reduce the initial strength of RCS. Synthesis of modified phenolic resin with direct-chain diacid DAn (/JS=6, where n means carbon amount) was studied here. The effects of the addition of modifying agent on molecular weight, gel time and softening point were investigated. Optimal addition of DAn (10% phenol) was obtained by testing the initial and retained flexural strengths of the modified resin. FT-IR spectra showed that carbonyl shifts to higher wave number. With the use of TG, SEM and strength loss curves, the relation between initial and retained strengths was analysed. Tests on the heated deformation curve, before and after resin modification, show that PF-DA10 has the characteristic of higher initial and retained strengths together. |
| first_indexed | 2024-12-22T07:10:16Z |
| format | Article |
| id | doaj.art-01837e6e9331477ca7507f101e5dee10 |
| institution | Directory Open Access Journal |
| issn | 1672-6421 |
| language | English |
| last_indexed | 2024-12-22T07:10:16Z |
| publishDate | 2005-02-01 |
| publisher | Foundry Journal Agency |
| record_format | Article |
| series | China Foundry |
| spelling | doaj.art-01837e6e9331477ca7507f101e5dee102022-12-21T18:34:32ZengFoundry Journal AgencyChina Foundry1672-64212005-02-01212833Study on direct-chain diacid modified phenolic resin for Al-alloy castingYundong JIJirong LUOMoyin LIResin coated sand (RCS) with phenolic resin matrix can hardly be collapsed when it is used in Al-alloy casting. Adding collapsing agent and reducing the concentration of resin are solutions adopted by workers, but these methods tend to reduce the initial strength of RCS. Synthesis of modified phenolic resin with direct-chain diacid DAn (/JS=6, where n means carbon amount) was studied here. The effects of the addition of modifying agent on molecular weight, gel time and softening point were investigated. Optimal addition of DAn (10% phenol) was obtained by testing the initial and retained flexural strengths of the modified resin. FT-IR spectra showed that carbonyl shifts to higher wave number. With the use of TG, SEM and strength loss curves, the relation between initial and retained strengths was analysed. Tests on the heated deformation curve, before and after resin modification, show that PF-DA10 has the characteristic of higher initial and retained strengths together.http://www.foundryworld.com/uploadfile/20094857966281.pdfdirect-chain diacidPF resinmodifyAl-alloy castingRCS |
| spellingShingle | Yundong JI Jirong LUO Moyin LI Study on direct-chain diacid modified phenolic resin for Al-alloy casting China Foundry direct-chain diacid PF resin modify Al-alloy casting RCS |
| title | Study on direct-chain diacid modified phenolic resin for Al-alloy casting |
| title_full | Study on direct-chain diacid modified phenolic resin for Al-alloy casting |
| title_fullStr | Study on direct-chain diacid modified phenolic resin for Al-alloy casting |
| title_full_unstemmed | Study on direct-chain diacid modified phenolic resin for Al-alloy casting |
| title_short | Study on direct-chain diacid modified phenolic resin for Al-alloy casting |
| title_sort | study on direct chain diacid modified phenolic resin for al alloy casting |
| topic | direct-chain diacid PF resin modify Al-alloy casting RCS |
| url | http://www.foundryworld.com/uploadfile/20094857966281.pdf |
| work_keys_str_mv | AT yundongji studyondirectchaindiacidmodifiedphenolicresinforalalloycasting AT jirongluo studyondirectchaindiacidmodifiedphenolicresinforalalloycasting AT moyinli studyondirectchaindiacidmodifiedphenolicresinforalalloycasting |