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Preparation of High-Molecular-Weight Poly(1,4-butylene carbonate-co-aromatic ester) and its chopping to Produce Macropolyols
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | 박근호 | - |
| dc.date.accessioned | 2018-11-08T08:16:13Z | - |
| dc.date.available | 2018-11-08T08:16:13Z | - |
| dc.date.issued | 2016-02 | - |
| dc.identifier.other | 21671 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/12098 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2016. 2 | - |
| dc.description.tableofcontents | 1. Introduction 1 2. Experimental 3 2.1 General remarks 3 2.2 Preparation of high-molecular-weight poly(1,4-butylene carbonate-co-aromatic ester)s 3 2.3 Chopping the high-molecular-weight poly(1,4-butylene carbonate-co-aromatic ester)s 4 3. Results and discussion 5 3.1 Preparation of high-molecular-weight poly(1,4-butylene carbonate-co-aromatic ester)s 5 3.2 Chopping the high-molecular-weight poly(1,4-butylene carbonate-co-aromatic ester)s 7 3.3 Properties and characterization of the macropolyols 14 4. Conclusions 19 5. Acknowledgements 20 6. Reference 21 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Preparation of High-Molecular-Weight Poly(1,4-butylene carbonate-co-aromatic ester) and its chopping to Produce Macropolyols | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2016. 2 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 739438 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000021671 | - |
| dc.subject.keyword | Macropolyol | - |
| dc.subject.keyword | Polyurethane | - |
| dc.subject.keyword | CO2-utilization | - |
| dc.subject.keyword | Dimethyl carbonate | - |
| dc.subject.keyword | Polycondensation | - |
| dc.description.alternativeAbstract | The condensation of a mixture of dimethyl carbonate (DMC) and the phthalate derivatives (dimethyl terephthalate, dimethyl isophthalate, and dimethyl phthalate) with 1,4-butanediol (BD), using a sodium alkoxide catalyst, generated high-molecular-weight poly(1,4-butylene carbonate-co-aromatic ester)s with Mn values of 50000−120000. The subsequent addition of polyols (BD, glycerol propoxylate, 1,1,1-tris(hydroxymethyl)ethane, or pentaerythritol) chopped the generated high-molecular-weight polymers to afford macrodiols or macropolyols with facile control of their molecular weight (Mn, 2000−3000) and unique chain topological composition. Macropolyols prepared by chopping poly(1,4-butylene carbonate-co-terephthalate) were waxy in nature, whereas those containing isophthalate and phthalate units were instead oily. The glass transition temperatures observed for the macropolyols increased from −50 to −30 °C upon increasing the proportion of aromatic ester units, and the viscosity of the oily compounds increased on incorporating the aromatic ester units. DMC is a benign chemical produced from CO2; phthalate derivatives are also inexpensive chemicals that can be produced on a large scale. The macropolyols synthesized by this chopping method may have potential applications in the polyurethane industry. | - |
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- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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