유기 카보네이트와 생분해성 폴리카보네이트의 효율적인 합성
Efficient Syntheses of Organic Carbonates and Biodegradable Poly(1,4-butylene carbonate-co-terephthalate)s
- 주제(키워드) polycondensation , polycarbonates , transesterification , DMC , PBCT
- 발행기관 아주대학교
- 지도교수 이분열
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000024076
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Dimethyl carbonate (DMC) is an environmentally benign chemical currently produced using CO2. Using the conventional Dean–Stark apparatus, a method was developed for the effective and selective removal of the methanol generated in the transesterification of DMC with alcohol. Using this device, various diols (HO-A-OH; A = (CH2)4, (CH2)2O(CH2)2, CH2C6H10CH2, and CH2C6H4CH2) were converted to mixtures of the corresponding MeOC(O)[O-A-OC(O)]OMe and MeOC(O)[O-A-OC(O)]2OMe. Dialkyl carbonates such as dibutyl carbonate, dibenzyl carbonate, and diallyl carbonate were also efficiently prepared from the corresponding alcohols using this device. The compound prepared from 1,4-butanediol, MeOC(O)[O(CH2)4OC(O)]1.5OMe, was subjected to polycondensation with HO(CH2)4[O2CC6H4CO2(CH2)4]1.5OH or HO(CH2)4[O2CC6H4CO2(CH2)4]1.8OH, which directly was prepared from terephthalic acid and 1,4-butanediol. The polycondensation afforded high-molecular-weight poly(1,4-butylene carbonate-co-terephthalate)s (PBCTs) with Mw of 80–270 kDa and 0.40–0.45 terephthalate mole fractions. PBCTs are attractive materials with biodegradability and LDPE-like thermal properties.
more목차
I. Abstract
1. Introduction
2. Results and Discussion
2.1 Preparation of butane-1,4-diyl dimethyl dicarbonate (1)
2.2 Preparation of bis(4-hydroxybutyl) terephthalate
2.3 Preparation of PBCTs
3. Conclusion
4. Experimental Section
4.1 General remarks.
4.2 MeOC(O)[O(CH2)4OC(O)]1.5OMe (1)
4.3 HO(CH2)4[O2CC6H4CO2(CH2)4]1.5OH (2)
4.4 Preparation of PBCTs (entry 2)
4.5 MeOC(O)[O(CH2)2O(CH2)2OC(O)]1.47OMe (3)
4.6 MeO[C(O)OCH2C6H10CH2O]1.07C(O)OMe (4)
4.7 MeO[C(O)OCH2C6H4CH2O]1.52C(O)OMe (5)
4.8 Dibutyl carbonate (6)
4.9 Dibenzyl carbonate (7)
4.10 Diallyl carbonate (8)
5. Acknowledgements
6. References
7. Supporting Information
