화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.3, 257-265, March, 2020
DOI10.1007/s13233-020-8041-0  Export Citation
Preparation of High-Elongation and High-Toughness Poly(l-lactide) Using Multi-Arm Methyl-β-Cyclodextrin-Poly(l-lactide)
Jin-Hee Hong, Seungjoo Haam, Giobin Lim1, †, and Jong-Hoon Ryu1, †
  • Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
  • 1Department of Chemical Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi 18323, Korea
E-mail:,
We synthesized 3-16 armed methyl-β-cyclodextrin-poly(l-lactide) (MCD-PLLA) polymers, and then blended them with PLLA. The addition of MCD-PLLA with 9 or 12 arms to PLLA dramatically increased the elongation at break (E) and toughness (UT) of PLLA with little affecting its Tg and tensile strength. The highest E and UT were obtained to be 127% and 6.85 GJ/m3, respectively, for PLLA blends containing these MCD-PLLAs. It was confirmed that the MCD-PLLA served as a nucleation agent for PLLA, inducing PLLA chains to form smaller and more uniform-sized crystallites compared with pure PLLA. The homogeneous fragmentation of these small and uniform-sized crystallites during tensile deformation consequently resulted in such a remarkable increase in E and UT. In contrast, the addition of MCD-PLLAs with more than 12 arms to PLLA decreased its E and UT mainly due to preferential crystallization by themselves.
Keywords:multi-arm polymer;methyl-β-cyclodextrin;poly(L-lactide);nucleating agent
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