کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5202679 | 1381907 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hydrazone-based hydrogel hydrolytically degradable in acidic environment Hydrazone-based hydrogel hydrolytically degradable in acidic environment](/preview/png/5202679.png)
We describe the synthesis of new crosslinker Nâ²-{3-[2-(4-{2-[3-(methacryloylamino)propanoyl]hydrazono}cyclohexyliden)hydrazino]-3-oxopropyl}-2-methylacrylamide, which is stable at physiological pH, but is hydrolytically cleaved in acidic pH. Study of acid hydrolysis showed that the crosslinker is hydrolyzed into two Nâ²-(3-hydrazino-3-oxopropyl)-2-methylacrylamide molecules and one 1,4-cyclohexanedione molecule. Hydrogels based on poly[N-(2-hydroxypropyl)methacrylamide] crosslinked with this crosslinker were prepared and their degradation rate was studied as a function of pH (in the range of pH 1.5-7.4). The hydrogel is cleaved within 8-27 days at pH between 1.5 and 6 and is stable at pH 7.4 making it promising for the construction of oesophageal stents.
Journal: Polymer Degradation and Stability - Volume 96, Issue 5, May 2011, Pages 756-759