화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.17, No.2, 71-77, June, 2005
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Characterization and processing of Biodegradable polymer blends of poly(lactic acid) with poly(butylene succinate adipate)
Sangmook Lee†, and Jae Wook Lee1
  • Department of Applied chemistry, Dongduk Women’s University, 23-1 Wolgok-dong, sungbuk-ku, Seoul 136-714, Korea
  • 1Applied Rheology Center, Department of Chemical Engineering, Sogang University, 1 shinsu-Dong, Mapo-Gu, Seoul 121-742, Korea
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We investigated thermal, rheological, morphological and mechanical properties of a binary blend of poly(lactic acid) (PLA) and poly(butylene succinate adipate) (PBSA). The blends were extruded and their molded properties were examined. DSC thermograms of blends indicated that the thermal properties of PLA did not change noticeably with the amount of PBSA, but thermogravimetric analysis showed that thermal stability of the blends was lower than that of pure PLA and PBSA. Immiscibility was checked with thermal data. The rheological properties of the blends changed remarkably with composition. The tensile strength and modulus of blends decreased with PBSA content. Interestingly, however, the impact strength of PLA/PBSA (80/20) blend was seriously increased higher than the rule of mixture. Morphology of the blends showed a typical sea and island structure of immiscible blend. The effect of the blend composition on the biodegradation was also investigated. In the early stage of the degradation test, the highest rate was observed for the blend containing 80 wt% PBSA.
Keywords:poly(butylene succinate adipate);poly(lactic acid);biodegradable;BOD5
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