Abstract
A series of poly(vinylalcohol-co-ethylene)/acetylsalicylic acid blends (PEVA/AcSa) of different AcSa contents were prepared and characterized by the solubility test, differential scanning calorimetry, and scanning electron microscopic analyses. The results revealed that AcSa was perfectly soluble in PEVA at certain composition and uniformly distributed throughout the polymer matrix. The release dynamic of AcSa from PEVA/AcSa material was studied at body temperature during 92h in which the influence of AcSa initially incorporated in PEVA, the pH of media, the membrane thickness, and the stability of AcSa release rate on the release dynamic were detailed.