| 학회 | 한국공업화학회 |
| 학술대회 | 2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 | 19권 1호 |
| 발표분야 | (KRICT) 기술이전을 위한 연구 및 개발동향 |
| 제목 | Synthesis and Characteristics of a Biobased High-Tg Terpolyester using heterocylic monomers |
| 초록 | Biobased polymers are eco-friendly materials that utilize renewable resources by replacing a part of the petroleum monomer, hopefully delaying the depletion of petroleum and energy sources. The typical biobased monomers are the heterocyclic molecules such as Isosorbide(ISB) and 2,5-furandicarboxylic acid(FDCA). These materials can be successfully used in melt polymerization process. Especially, ISB was studied in various fields such as polyester, epoxy, urethane, Bio-polycarbonate. However, in case of melt polymerization for polyester, it seems very challenging to increase the molecular weight with low reactivity of ISB as secondary alcohols. A solution for overcoming the low reactivity of terephthalic acid and ISB is proposed that uses 1,4-cyclohexane dimethanol and ethylene glycol. Using the different reactivities, volatilities, and degree of steric hindrances among the three diols, a highly heat-resistive biobased terpolyester(PEICT; Tg=93~143°C) was synthesized with a high degree of polymerization. After esterification, most of the oligomer end groups were found to consist of ISB, which decreases the overall reactivity of transesterification due to its characteristics. However, this end group changed gradually into ethylene units, which accelerated the transesterification and chain growth in the polycondensation process via chain scission at the carbonyl carbon adjacent to the ethylene unit. Consequently, the steric conformation and boiling point of the comonomer are key factors when considering the use of another monomer to improve the properties of a biobased polymer. |
| 저자 | 황성연 |
| 소속 | 한국화학(연) |
| 키워드 | Biopolymer; Terpolyester; Isosorbide; Heterocyclic monomer |
