Ultrasound Effects on Toughness of Biodegradable Poly Lactic Acid with Natural Rubber
- 주제(키워드) Biodegradable , Polymer Blends , Ultrasound , Poly Lactic Acid , Natural Rubber
- 발행기관 서강대학교 일반대학원
- 지도교수 이재욱
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위명 석사
- 학과 및 전공 일반대학원 화공생명공학과
- 실제URI http://www.dcollection.net/handler/sogang/000000061173
- 본문언어 영어
- 저작권 서강대학교 논문은 저작권보호를 받습니다.
초록/요약
Poly Lactic Acid (PLA), representative biodegradable polymer, has a potential to solve the waste disposal problems caused by petroleum based polymers. However, PLA is not enough to be an alternative of conventional polymers due to its high brittleness and low price competitiveness. In this study, high brittleness and low price competitiveness of PLA were considerably enhanced by blending with natural rubber (NR). For maintaining the biodegradability of PLA/NR blends, ultrasound imposed in the blending process without using block-copolymer or compatibilizer. As a result of the study, mechanical properties of PLA have been improved significantly. On the other hand, we found the ultrasound sonication helps to disperse the rubber particle in PLA matrix and there exists optimum condition of ultrasound sonication time.
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