화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.31, No.3, 269-272, May, 2007
Export Citation
전자선 조사가 Poly(lactic acid) 및 개질된 Poly(lactic acid)의 유변학적 특성에 미치는 영향
Effects of Irradiation of Electron Beam on the Rheological Properties of Poly(lactic acid) and Chemically Modified Poly(lactic acid)
신부영, 강경수, 조규순, 한도훙, 이태진, 송정섭1, 이상일2, 김봉식†
  • 영남대학교 디스플레이화공학부
  • 1선문대학교 화학과
  • 2(주)채널디엠
Boo Young Shin, Kyoung Su Kang, Gyu Soon Jo, Do Hung Han, Tae Jin Lee, Jeong-Sup Song1, Sang Il Lee2, and Bong Shik Kim†
  • School of Display and Chemical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeungsan 712-749, Korea
  • 1Dept. of Chemistry, Sun Moon University, Kalsan-ri, Tangjeong-myeon, Asan-si, Chungnam 336-708, Korea
  • 2Channel DM Co., Ltd., 12F, Gateway Tower, Dongja-dong, Yongsan-gu, Seoul 140-709, Korea
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초록
본 연구는 생분해성 고분자인 폴리락틱에시드(poly(lactic acid; PLA)의 가공성을 향상시키는 연구의 일환으로 순수 PLA, 반응압출법에 의한 화학적으로 개질된 PLA 및 기능성 단량체를 함유한 PLA에 전자선을 조사하여 PLA를 개질한 후 유변학적 특성을 조사하였다. 유변학적 특성은 복합점도와 log G vs. log G 선도를 이용하여 해석 분석 비교하였다. 그 결과 전자선 조사로 개질된 순수 PLA 및 화학적으로 개질된 PLA의 복합점도는 전자선 조사량에 따라 감소하는 경향을 보였지만, 기능성 단량체가 첨가된 PLA는 전자선 조사에 의해 복합점도가 증가하다가 감소하는 경향을 보였다.
In this study, we investigated the effects of electron beam irradiation on the rheological properties of PLA for enhancing processability. The electron beam was irradiated onto the pure PLA, chemically modified PLA by reactive extrusion, and PLA containing functional monomer. The complex viscosity and log G vs. log G plot among dynamic rheological properties were chosen for comparison. The complex viscosity of irradiated pure and chemically modified PLA decreased significantly due to degradation of PLA molecules with increasing the E-beam dosages. Complex viscosity of irradiated PLA with functional monomer showed maximum value at moderate dosage, while at high dosage the complex viscosity was decreased by a prolonged irradiation.
Keywords:poly(lactic acid);electron beam irradiation;reactive extrusion;functional monomer;complex viscosity;Cole-Cole plot
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