کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204232 | 1381954 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: FTIR analysis of hydrolysis in aliphatic polyesters FTIR analysis of hydrolysis in aliphatic polyesters](/preview/png/5204232.png)
Infrared (IR) spectroscopy was adopted to study the hydrolytic degradation of films of aliphatic polyesters in alkaline environment. A measurable increase with the time of immersion of the absorbance of the peak centered at about 1570Â cmâ1 was observed. Analysis of the IR spectra showed that the integrated peak area in that region can be used to quantify changes in the concentration of degradation products and thus to provide indications regarding the kinetic constant of the hydrolysis reaction. It was found that the hydrolysis of ester bonds proceeds linearly with time, and this result suggests that the controlling mechanism is the chemical reaction rather than water diffusion. The results also show that degradation rate increases with increasing polydispersity.
Journal: Polymer Degradation and Stability - Volume 92, Issue 8, August 2007, Pages 1491-1497