| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 봄 (04/09 ~ 04/10, 대전컨벤션센터) |
| 권호 |
34권 1호 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Synthesis and Properties of poly(L-lactide)-polyether-poly(L-lactide) triblock copolymers |
| 초록 |
In this study, the influence of the copolymer composition and the soft segment molecular weight on the physical properties of poly(L-lactide)-polyether-poly(L-lactide) triblock copolymer are investigated. The triblock copolymers were synthesized by ring opening polymerization of L-lactide monomer using polyether as the initiator. The comparison between the measured Mn by 1H-NMR and the theoretical Mn considering the yield shows good agreement in all the samples. The effect of catalyst concentration and temperature on thermal degradation during synthesis and processing was observed by isothermal TGA. The PLLA-polyether-PLLA triblock copolymer with low catalyst concentration was prepared by injection molding to enhance the thermal stability during the synthesis and processing. The improvement of tensile strength and elongation at break of the copolymer was observed. The impact strength of the block copolymer was also enhanced when compared to neat PLLA. |
| 저자 |
김혜영, 김성철
|
| 소속 |
한국과학기술원 |
| 키워드 |
PLA; copolymer; impact strength
|
| E-Mail |
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