Academic Journal
Monatshefte für Chemie / Synthesis of poly(n-alkyl acrylamides) and evaluation of nanophase separation effects by temperature-dependent infrared spectroscopy
| العنوان: | Monatshefte für Chemie / Synthesis of poly(n-alkyl acrylamides) and evaluation of nanophase separation effects by temperature-dependent infrared spectroscopy |
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| المؤلفون: | Bretterbauer, Klaus, Leibetseder, Felix, Bičvić, Julia |
| بيانات النشر: | Springer-Nature |
| سنة النشر: | 2023 |
| المجموعة: | Johannes Kepler University Linz: JKU |
| مصطلحات موضوعية: | Polymerizations, IR spectroscopy, Nanostructures, Conformational analysis, Side-chain crystallization |
| جغرافية الموضوع: | UL:TN:CO |
| الوصف: | Common linear polymers are known to undergo phase changes at the glass-transition temperature (Tg) and the melting point (Tm). In recent years, it has also been shown that molecules with long aliphatic side chains can give rise to a backbone-independent melting phenomenon, known as nanophase separation. This effect describes the self-assembly — independent of the polymer backbone — of alkyl side chains into semi-crystalline nanostructures. This work presents optimized, gram scale synthesis routes for dodecyl and octadecyl acrylamide and their respective homopolymers. Differential scanning calorimetry (DSC) experiments detected a broad endothermal signal for poly(n-dodecyl acrylamide) at − 29 °C and a narrower, more intense signal for poly(n-octadecyl acrylamide) at 34 °C. These signals indicate the nanophase separation TM of the alkyl side chains. We undertook the first temperature-controlled infrared spectroscopy investigations of these materials revealing a clear hypsochromic shift of the C–H stretching signals above TM and the amide I signal shifts that occurred only above and below Tg. These results provide further evidence, that the side chains act independently of the polymer backbone and show that infrared spectroscopy is a powerful tool for monitoring conformational changes in polymer side chains. ; Version of record |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text/html |
| اللغة: | English |
| Relation: | vignette : https://epub.jku.at/titlepage/urn/urn:nbn:at:at-ubl:3-16816/128; urn:nbn:at:at-ubl:3-16816; https://resolver.obvsg.at/urn:nbn:at:at-ubl:3-16816; local:99147171355903331; system:AC16748228 |
| DOI: | 10.1007/s00706-023-03037-8 |
| الاتاحة: | https://doi.org/10.1007/s00706-023-03037-8 https://epub.jku.at/doi/10.1007/s00706-023-03037-8 https://resolver.obvsg.at/urn:nbn:at:at-ubl:3-16816 |
| Rights: | cc-by_4 |
| رقم الانضمام: | edsbas.78FEE648 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s00706-023-03037-8 |
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