The degradation of PLLA-EC blend increased greatly with the ethylcellulose contents as PLLA-EC being less than 70/30.Thus PLLA-EC blends with various properties may be used as biodegradable polymers.

• EC的含量对PLLA-EC共混物在磷酸缓冲溶液中的降解速率也有显著影响，当EC含量高于30%25时，PLLA-EC共混物的降解速率会迅速增大。