Enhancement of Mechanical Properties Upon Hydration in Copolymers of PEG and Iodinated Tyrosine-derived Poycarbonates
| العنوان: | Enhancement of Mechanical Properties Upon Hydration in Copolymers of PEG and Iodinated Tyrosine-derived Poycarbonates |
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| المؤلفون: | Fahmi Bedoui, A. Luk, L. K. Widjaja, Durgadas Bolikal, Joachim Kohn, N. S. Murthy |
| المصدر: | MRS Proceedings. 1132 |
| بيانات النشر: | Springer Science and Business Media LLC, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Materials science, technology, industry, and agriculture, Plasticizer, Modulus, Polymer, Diluent, chemistry.chemical_compound, chemistry, Chemical engineering, PEG ratio, Copolymer, medicine, Swelling, medicine.symptom, Ethylene glycol |
| الوصف: | Increase in modulus upon hydration in copolymers of desaminotyrosyl-tyrosine ethyl ester (DTE) and poly(ethylene glycol) (PEG) with iodinated tyrosines, poly(I2DTE-co-PEG carbonate)s, was investigated by varying the fraction and the molecular weight of the hydrophilic PEG component. Water, as expected, acts as plasticizer in polymer with PEG content < 15 wt% and > 30 wt%. But, water has the opposite effect in iodinated polymers with moderate PEG contents, between 15 to 20 wt%: it enhances the Young's modulus. The strength and modulus of hydrated poly(I2DTE-co-15%PEG2K carbonate)s increased by as much as fifteen fold upon hydration. While the decrease in the mechanical properties in most polymeric materials with diluents such water is due to the solvent-induced swelling, the increase in strength and modulus that is observed is most likely due to the reinforcing effect of the increased cross-linking efficiency of the hydrated PEG domains in the iodinated polymer. |
| تدمد: | 1946-4274 0272-9172 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::8bc29512b976c3fadf2f742d7ad19e3e https://doi.org/10.1557/proc-1132-z09-12 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........8bc29512b976c3fadf2f742d7ad19e3e |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 19464274 02729172 |
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