Improving the Toughness of Poly (L-lactic acid) by Interpenetrating Network Structure
An interpenetrating polymer network was formed by blending of PLLA and PEG cross-linked β-CD to improve the toughness of PLLA, and the mechanical properties of PLLA composites were studied using tensile test. The PLLA composite samples exhibited a single glass transition and their Tg values decreased with increasing PEG/β-CD content, indicating that PLLA and PEG/β-CD are miscible. The PLLA composite samples aged at room temperature achieved the highest fracture strain (about 235%), about 40 times that of the original PLLA sample, while the Young's modulus was not seriously hampered.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
T. G. Dong et al., "Improving the Toughness of Poly (L-lactic acid) by Interpenetrating Network Structure", Advanced Materials Research, Vols. 239-242, pp. 1919-1922, 2011