The temperature dependence of the Flory-Huggins interaction parameter χ for poly(-butyl acrylate)--poly(methyl methacrylate) (PBA--PMMA) was quantified from small-angle X-ray scattering (SAXS) analysis using random phase approximation (RPA) theory. It was found from the χ estimation (χ=0.0103+14.76/T) that the enthalpic contribution, χH, a measure for temperature susceptibility of χ, is 1.7-4.5 folds smaller for PBA--PMMA than for the conventional styrene-diene-based block copolymers, which have been widely used for thermoplastic elastomers. This finding suggests that these fully acrylic components can be a desirable chemical pair for constituting terpolymers applied for thermally stable and mechanically resilient elastomers.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9785592 | PMC |
| http://dx.doi.org/10.3390/polym14245567 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Maintaining hexagonal structures through interfacial positioning of crosslinkers for nanofiltration.
J Colloid Interface Sci
December 2024
Institute for Frontier Materials, Deakin University, Geelong VIC 3216, Australia. Electronic address:
Hypothesis: Optimizing interfacial positioning of crosslinkers within a reactive self-assembled hexagonal lyotropic liquid crystals (HLLC) system could assist in retaining the hexagonal structure during polymerization and thereby improving water filtration performances of the as-synthesized nanofiltration membranes.
Experiments: The positioning of the hydrophilic crosslinker, poly (ethylene glycol) diacrylate (PEGDA), within the reactive HLLC system was systematically investigated using H and C solid nuclear magnetic resonance (NMR) and small angle X-ray scattering (SAXS) techniques. The structural variation and water filtration performances of these HLLC systems with/without crosslinkers after polymerization were further studied using grazing incidence SAXS (GISAXS) and crossflow filtration tests, respectively.
Sequence-dependent conformational preferences of disordered single-stranded RNA.
Cell Rep Phys Sci
November 2024
Chemistry Program, Science Division, New York University Abu Dhabi, Abu Dhabi 129188, UAE.
Disordered single-stranded RNA (ssRNA) molecules, like their well-folded counterparts, have crucial functions that depend on their structures. However, since native ssRNAs constitute a highly heterogeneous conformer population, their structural characterization poses challenges. One important question regards the role of sequence in influencing ssRNA structure.
View Article and Find Full Text PDFThe Intramolecular Self-Assembly of Statistical Copolymers in Aqueous Solution to Form Anisotropic Single-Chain Nanoparticles with Tunable Aspect Ratio.
Macromol Rapid Commun
December 2024
School of Mathematical and Physical Sciences, University of Sheffield, Dainton Building, Sheffield, S3 7HF, UK.
Natural single-chain nanoparticles (SCNPs) such as proteins have inspired research into the formation and application of synthetic SCNPs. Although the latter can mimic general aspects of the self-assembly behavior of their biological counterparts, these systems remain relatively understudied. In this respect, a systematic series of amphiphilic statistical copolymers (ASC) of different molecular weights, with a hydrophilic comonomer (methacrylic acid) and varying hydrophobic comonomer to encompass methacrylates of different hydrophobicity, are synthesized.
View Article and Find Full Text PDFSimilar but Distinct-Biochemical Characterization of the Staphylococcus aureus Serine Hydrolases FphH and FphI.
Proteins
December 2024
Ilse Katz Institute for Nanoscale Science and Technology (IKI), Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Staphylococcus aureus is a major cause of infections like bacteremia, pneumonia, and endocarditis. These infections are often linked to the ability of S. aureus to form biofilms.
View Article and Find Full Text PDFKapok fibers modified with cationic surfactants: Structural insights and efficient removal of Cr(VI) and bisphenol A.
J Colloid Interface Sci
December 2024
Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil. Electronic address:
In this study, kapok fiber (KF) a hollow and hydrophobic fiber, was modified with cetyltrimethylammonium bromide (CTAB) or cetylpyridinium chloride (CPC), rendering adsorbed amount of ∼0.75 × 10 mol/g. Small-angle X-ray scattering (SAXS) measurements of dry KF/CTAB and KF/CPC evidenced a periodic distance of ∼2.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!