| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 가을 (10/07 ~ 10/08, 대구 EXCO) |
| 권호 |
35권 2호 |
| 발표분야 |
고분자 가공/복합재료 |
| 제목 |
The thermal and mechanical properteis ofPLA/PEG blends; The effect of molecular weight PEG |
| 초록 |
Melt blending of polylactic acid (PLA) and a chain-extended polyethylene glycol (CE-PEG) has been performed in an effort to toughen the PLA without significant modulus and ultimate tensile strength losses. The chain-extended PEG was prepared with melt condensation of a low molecular weight PEG and MDI for enhancement of the molecular weight of PEG. The thermal and mechanical properties, miscibility and phase morphologies of blends were investigated. The blend were found by thermal and fracture surface analysis to be a partially miscible system with shifted glass transition temperatures. Blend of PLA with CE-PEG does not lead to important drop of tensile strength and modulus whereas the elongation at break is characterized by a significant increase (540%), compared with neat PLA and PLA/PEG. The relative ductility of PLA/CE-PEG is 40 times higher than that of neat PLA. The brittle fracture of neat PLA was transformed into ductile fracture by the addition of CE-PEG. |
| 저자 |
윤근병1, 이동호2, 박덕훈1, 송준철1, 박병식3
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| 소속 |
1경북대, 2동양미래대, 3한국국제대 |
| 키워드 |
PLA; PEG; Melt Blending
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| E-Mail |
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