دورية أكاديمية
Effect of End Groups on the Cloud Point Temperature of Aqueous Solutions of Thermoresponsive Polymers: An Inside View by Flory-Huggins Theory.
| العنوان: | Effect of End Groups on the Cloud Point Temperature of Aqueous Solutions of Thermoresponsive Polymers: An Inside View by Flory-Huggins Theory. |
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| المؤلفون: | Dang TTN; Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium., Nies E; Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium. |
| المصدر: | Polymers [Polymers (Basel)] 2024 Feb 19; Vol. 16 (4). Date of Electronic Publication: 2024 Feb 19. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: MDPI Country of Publication: Switzerland NLM ID: 101545357 Publication Model: Electronic Cited Medium: Internet ISSN: 2073-4360 (Electronic) Linking ISSN: 20734360 NLM ISO Abbreviation: Polymers (Basel) Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: Basel : MDPI |
| مستخلص: | In an effort to gain insight into the origin of the effects of end groups on the cloud point temperature (Tcp) as a function of the polymer molar mass of thermoresponsive polymers with lower critical solution behavior in dilute aqueous solutions, we use the Flory-Huggins (FH) theory amended for end groups. The theory was applied to available experimental data sets of poly(N-isopropylacrylamide) (PNIPAM), poly(4-vinylbenzyl methoxytris(oxyethylene) ether) (PTEGSt), and poly( α -hydro- ω -(4-vinylbenzyl)tetrakis(oxyethylene) ether) (PHTrEGSt). The theory relates the variations in TcpM,ϕcp for different end groups to the effective FH χ parameter of the end groups and explains the qualitative notion that the influence of the end groups is related to the hydrophobicity/hydrophilicity of the end groups relative to that of the so called intrinsic TcpM,ϕcp response of a polymer without end groups. The limits to the applicability of the FH theory are established, and a set of possible theoretical improvements is considered. The ultimate scrutiny of the simple FH theory and suggested improved theories must await the measurement of truly thermodynamic cloud points; the available cloud points are merely estimations of the thermodynamic cloud point, for which the deviation to the true cloud point cannot be established with sufficient accuracy. |
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| فهرسة مساهمة: | Keywords: FH theory for end-functionalized homopolymers; cloud point temperature; dilute solution regime; end groups; lower critical solution behavior; thermoresponsive polymers |
| تواريخ الأحداث: | Date Created: 20240224 Latest Revision: 20240227 |
| رمز التحديث: | 20240227 |
| مُعرف محوري في PubMed: | PMC10893037 |
| DOI: | 10.3390/polym16040563 |
| PMID: | 38399940 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 2073-4360 |
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| DOI: | 10.3390/polym16040563 |