کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5188528 | 1381158 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ investigations on enzymatic degradation of poly(É-caprolactone)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The enzymatic degradation of poly(É-caprolactone) (PCL) has been investigated by using quartz crystal microbalance with dissipation (QCM-D) and surface plasmon resonance (SPR) in situ. The frequency and dissipation responses of QCM-D and the SPR signal responses can well describe the weight loss and the morphological changes of a PCL film. Our experiments reveal that the degradation has much dependence on the crystallinity and morphology of PCL. PCL with lower crystallinity (45%) and small spherulites degrades in a way of layer-by-layer. Both QCM-D and SPR measurements demonstrate that the degradation is of first-order. However, PCL with higher crystallinity (55%) and larger spherulites exhibits a more complex degradation behavior, namely, the degradation in crystalline region lags behind than that in amorphous region, leading to a microporous structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 48, Issue 21, 5 October 2007, Pages 6348-6353
Journal: Polymer - Volume 48, Issue 21, 5 October 2007, Pages 6348-6353
نویسندگان
Yi Hou, Jing Chen, Peijian Sun, Zhihua Gan, Guangzhao Zhang,