CAJ | 학술논문

聚乳酸（PLA）与环氧大豆油（ESO）经熔融共混制得具有高韧性的PLA/ESO共混物，并研究了ESO含量对PLA微观形态、力学和流变性能的影响规律。结果表明：ESO可显著降低PLA的熔体黏度，提高PLA的韧性；PLA/ESO共混物在低ESO含量（10%）时为部分相容，而在高ESO含量（20%和30%）时发生了相分离，从而使共混物的断裂伸长率和冲击强度随ESO含量增加先增大后减小，且分别在ESO含量为20%和15%时达到最大值，约为PLA的17倍和2.9倍，而拉伸强度则随之减小。
취유산（PLA）여배양대두유（ESO）경용융공혼제득구유고인성적PLA/ESO공혼물，병연구료ESO함량대PLA미관형태、역학화류변성능적영향규률。결과표명：ESO가현저강저PLA적용체점도，제고PLA적인성；PLA/ESO공혼물재저ESO함량（10%）시위부분상용，이재고ESO함량（20%화30%）시발생료상분리，종이사공혼물적단렬신장솔화충격강도수ESO함량증가선증대후감소，차분별재ESO함량위20%화15%시체도최대치，약위PLA적17배화2.9배，이랍신강도칙수지감소。
Poly(lactic acid) (PLA) and epoxidized soybean oil (ESO) was melt blended to prepare the PLA/ESO blends with high toughness. The effects of ESO contents on the phase morphologies, mechanical and rheological properties of the prepared PLA/ESO blends were investigated. The introduction of ESO significantly decreased melt viscosity and improved toughness of PLA. The PLA/ESO blend with low ESO content (10%) was a partially miscible system, whereas that with high ESO content (20% and 30%) exhibited distinct phase separation. Elongation at break and impact strength of the blends increased firstly and then decreased with increasing ESO content. The former reached the maximum value (17 times that of PLA) at ESO content of 20%, and the latter reached the maximum value (2.9 times that of PLA) at ESO content of 15%. Tensile strength of the blends decreased with increasing ESO content.