Poly(ethylene) (PE) is a commonly used semi-crystalline polymer which, due to the lack of polar groups in repeating unit, not able form Langmuir or Langmuir–Blodgett (LB) films. This problem can be solved using PEs with hydrophilic arranged at regular distances within backbone. With acyclic diene metathesis (ADMET) polymerization, tool for precise addition after certain interval methylene sequence available. In this study, we demonstrate formation Langmuir/LB films from two different...

Poly(ethylene oxide) (PEO) is a polymer of great interest due to its prevalence in biomedical, pharmaceutical, and ion conductive systems. In this study, the crystallization behaviors PEO with 22 monomer units (PEO22) having same degree polymerization but an additional 1,4-disubstituted 1,2,3-triazole ring central position chain (PEO11-TR-PEO11) are investigated. PEO11-TR-PEO11 shows one type lamella crystal after cooling T = 0 °C, structural changes during heating below their final melting...

An isotactic polypropene (i-PP) prepared with a metallocene catalyst system and two random copolymers of propene ethene 2.8 5.7 wt % ethene, respectively (PP-co-E-2.8, PP-co-E-5.7), were isothermally crystallized during simultaneous small- wide-angle X-ray scattering (SAXS, WAXS) in synchrotron measurements. Identical measurements carried out after adding 0.3 N,N'-dicyclohexyl-2,6-naphthalene dicarboxamide, β nucleating agent (β-NA). All samples form the γ-modification to certain extent....

A series of amphiphilic diblock copolymers and triphilic triblock copolymer analogues the architectures BA, CAB, CBA have been synthesized characterized with respect to their aggregation behavior in water. The A, B, C components block are formed by hydrophilic poly(glycerol monomethacrylate) (PGMA), lipophilic poly(propylene oxide) (PPO), a fluorophilic perfluoroalkyl segment, respectively. Their critical micelle concentrations water determined from surface tension measurements. copolymers,...

This work focuses on the reaction mechanism of poly(sulfur nitride) ((SN)x, (S15N)x), with ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate [EMIm][OAc]. We compare this IL S4N4 or its 15N labeled form S415N4, a precursor for synthesis (SN)x and (S15N)x. After purification S4N4-IL- S415N4-system via column chromatography, we characterize products 1H, 13C nuclear magnetic resonance (NMR) spectroscopy electron spray ionization time-of-flight mass spectrometry (ESI-ToF-MS). Furthermore,...

This work focuses on the reaction mechanism of poly(sulfur nitride) ((SN)x, (S15N)x), with ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate [EMIm][OAc]. We compare this IL S4N4 or its 15N-labeled form S415N4, a precursor for synthesis (SN)x and (S15N)x. After purification S4N4-IL- S415N4-IL systems via column chromatography, we characterized products 1H, 13C, 15N nuclear magnetic resonance spectroscopy electron spray ionization time-of-flight mass spectrometry. Furthermore,...

Abstract Amphiphilic di‐ and triblock copolymers containing poly(ethylene oxide) (PEO) as the hydrophilic block poly(perfluorohexylethyl methacrylate) (PFMA) hydrophobic were synthesized by atom‐transfer radical polymerization using hydroxy‐terminated PEO macroinitiator. The characterized size exclusion chromatography 1 H NMR spectroscopy. Self‐association in aqueous solution has been investigated surface tension measurements, dynamic light scattering (DLS), transmission electron microscopy...

Aliphatic polyesters having pendant azide groups were prepared by enzymatic polycondensation in the presence of lipase from Candida antarctica type B (CAL-B). The grafting reaction to N3-functional polyester was carried out quantitatively at room temperature using copper-catalyzed azide−alkyne cycloaddition (CuAAC, "click" reaction) with monoalkyne-functional poly(ethylene oxide) (alkyne-PEO, Mn = 750 g/mol). Furthermore, both and successfully sequential one-pot reaction. graft copolymer...

Blends of poly(ethylene oxide) (PEO) and poly(methyl acrylate) (PMA) as well the respective diblock copolymers PEO-b-PMA form a homogeneous melt undergo crystallization PEO upon cooling. Although an identical (Mn = 5000 g/mol) is used in blends copolymers, melting behavior at comparable PMA contents differs strongly revealed by temperature-resolved small-angle X-ray scattering (TR-SAXS) differential scanning calorimetry (DSC) measurements. After isothermal crystallization, lamellae thicken...

The contributions of proton hopping and vehicle mechanism to the intrinsic conductivity was investigated in crystalline liquid 1,2,3-triazole.

A new series of poly(perfluorohexylethyl methacrylate)-block-poly(ethylene oxide)-block-poly(perfluorohexylethyl methacrylate), PFMA-b-PEO-b-PFMA triblock copolymers has been synthesized by atom transfer radical polymerization using bifunctional PEO macroinitiators. The molecular structure the block was confirmed 1H NMR spectroscopy and SEC. X-ray scattering studies have carried out to investigate their bulk properties. SAXS shown cubic arrangement spheres (bcc), hexagonally packed cylinders...

Langmuir monolayers and Langmuir−Blodgett (LB) film morphologies of block copolymers hydrophobically modified iron oxide nanoparticles were studied by surface pressure−mean molecular area (π−mmA) measurements tapping mode atomic force microscopy (AFM). The amphiphilic diblock consisted a hydrophilic poly(ethylene oxide) (PEO) hydrophobic poly(isobutylene) (PIB) block. π−mmA isotherm PEO97-b-PIB37 (the subscripts refer to the respective degrees polymerization) at air/water interface had an...

Di- and triblock copolymers of tert-butyl methacrylate (tBMA) 2-(N-methylperfluorobutanesulfonamido)ethyl (FMA) were synthesized by sequential anionic polymerization. These polymers characterized size-exclusion chromatography 1H 19F NMR spectroscopy. The microphase separation bulk samples was studied atomic force microscopy small-angle X-ray scattering. Thermal annealing the block at 200 °C yielded inter- intramolecular anhydrides due to splitting ester having groups connected with isobutene...

The tremendous influence of hydrophilic block length tuning on the aggregation behavior novel water-soluble triphilic (i.e., hydrophilic, lipophilic, and fluorophilic) α,ω-perfluoroalkyl end-capped symmetric ABA triblock copolymers is demonstrated. A lipophilic B blocks are comprised poly(glycerol monomethacrylate) (PGMA) poly(propylene oxide) (PPO), respectively. fluorophilic component consists two "clicked" perfluoroalkyl segments (C9F19) at ends copolymers. Two different synthesized,...

This study investigated and correlated physical properties cell interactions of copolymers obtained by a poly(ethylene glycol) (PEG)-modulated fermentation Azotobacter vinelandii UWD. PEGs with molecular weights 400 3400 Da di(ethylene (DEG) were used to modulate the bacterial synthesis poly(beta-hydroxybutyrate) (PHB). The PHB crystallinity was determined wide-angle X-ray scattering (WAXS). Small-angle (SAXS) showed that lamellar distances decreased between modulated PEG or DEG....

Langmuir films of multifunctional, hydrophilic polyethers containing a hydrophobic cholesterol group (Ch) were studied by surface pressure-mean molecular area (π-mmA) measurements and Brewster angle microscopy (BAM). The either homopolymers or diblock copolymers linear poly(glycerol) (lPG), poly(glyceryl glycidyl ether) (lPGG), poly(ethylene glycol) (lPEG), hyperbranched (hbPG). Surface pressure revealed that the lPG hbPG did not stay at water after spreading solvent evaporation, in contrast...

ABSTRACT The crystallization and melting behavior of a series poly(glycerol adipate) (PGA) based graft copolymers with either poly(ε‐caprolactone) (PCL), poly(ethylene oxide) (PEO), or PCL‐ b ‐PEO diblock copolymer side chains (i.e., PGA‐ g ‐PCL, ‐PEO, ‐(PCL‐ ‐PEO)) was studied using polarized light optical microscopy (POM), differential scanning calorimetry (DSC), small‐angle X‐ray scattering (SAXS), wide‐angle diffraction (WAXD). These results were compared the corresponding linear analogs...

We investigate the reactive dissolution process of poly(sulfur nitride) (SN)x in ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate [EMIm][OAc] comparison to elemental sulfur same IL. It has been known from literature that during reaction S8 with [EMIm][OAc], respective thione is formed via a radical mechanism. Here, we present new results on kinetics formation imidazole (EMImS) hexasulfur dianion [S6]2– and trisulfur anion [S3]•–. can show first, which dissociates then Also, long-term...

Abstract A simple approach using comb‐like polymers that undergo nanophase separation between the polyester backbone and stearoyl side chains is proposed for preparation of structured non‐spherical nanoparticles from a nanoemulsion. Depending on degree esterification OH groups poly(glycerol adipate) differently ordered nanostructures obtained. perfect lamellar arrangement obtained with high leads to spherical an internal onion‐like structure. However, when only 20 mol%, polygonal...

Monolayers of ABA amphiphilic triblock block copolymers are studied using surface pressure−area and X-ray reflectivity (XR) measurements. The composed long poly(ethylene oxide) (PEO) middle blocks with poly((perfluorohexyl)ethyl methacrylate) (PFMA) end blocks. isotherms water-insoluble species show two pseudoplateaus. plateau at low pressure is consistent the pseudoplateau observed for PEO in literature. brush region can be assigned to horizontal vertical rearrangement whole PFMA chains...