High molecular weight Bio-based Furan copolyesters : Synthesis, structure and properties = 고분자량 바이오 퓨란 폴리에스터의 합성과 구조, 물성 연구 Synthesis, structure and properties

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The goal of this study was to develop ecofriendly bioplastics, which could be applicable in beverage packaging, by synthesizing furan-based co-polyesters and incorporating them into bottles. The furan-based co-polyesters were synthesized by a two-step melt polycondensation reaction using ethylene glycol (EG), 1,4-cyclohexanedimethanol (CHDM), and dimethyl furan dicarboxylate (DM-FDCA). The incorporation of CHDM into the main chain of polymers has been found to increase chain mobility due to its ring-conformational transition, and it also affects the co-polyesters. The co-polyesters show not only high elongations at break, but also improved Izod impact strengths compared to that of pure poly(ethylene furanoate) (PEF). Despite these characteristics, however, the molecular weights of the co-polyesters were not sufficient for manufacturing purposes. Thus, some samples were further reacted in the solid state by solid state polymerization (SSP) to generate higher-molecular-weight polymers. The crystallization kinetics of the co-polyesters prepared were analyzed to determine the reaction parameters, and the sample whose intrinsic viscosity was greater than 1.0 dL/g, was successfully processed into bottles. The bottles prepared had higher O2-barrier properties and lower acetaldehyde(AA) contents than those of commercially available PET bottles. The results obtained so far show that furan-based co-polyesters can be used for food-packaging applications.
Advisors
Park, O Okresearcher박오옥researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2017.2,[vii, 67 p. :]

Keywords

바이오; 퓨란; 공중합체; CHDM; 중합; bio; furan; co-polyester; polymerization

URI
http://hdl.handle.net/10203/241880
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=675751&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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