Abstract High‐performance adhesives are of great interest in view industrial demand. We herein identify a straightforward synthetic strategy towards universal hydrogen‐bonded (H‐bonded) polymeric adhesives, using side‐chain barbiturate (Ba) and Hamilton wedge (HW) functionalized copolymer. Starting from rubbery copolymer containing thiolactone derivatives, Ba HW moieties tethered as pendant groups via an efficient one‐pot two‐step amine‐thiol‐bromo conjugation. Hetero‐complementary Ba/HW...

The structure of a bis-urea based reversible polymer is investigated using capillary viscosimetry, infrared spectroscopy, small-angle neutron scattering, and rheology. highly viscoelastic solutions obtained in toluene are due to the formation long rigid fibrillar species. cross section these wires measured shown likely contain two or three molecules per axial repetition unit.

A low molecular weight bisurea in nonpolar solvents is shown to self-assemble by hydrogen bonding into two distinct high structures. At temperature and concentration, the most stable structure a thick cylindrical assembly, responsible for very viscosity of solution. higher or lower filaments disappear favor thinner filaments, leading viscosity. The reversible transition occurs over range 5 degrees C only, showing that it highly cooperative. structural switch can also be triggered changing...

Abstract Precise cancer nanomedicine requires rational molecular instructions of therapeutic agents. Harnessing the structure‐property‐function relationships represents a practical strategy toward smart and effective nanomedicine. A structurally novel hydrogen‐bonded (H‐bonded) supramolecular nanoformulation generated by orthogonal self‐sorting assembly chemo‐prodrug (FPtF) phototherapeutics (BPeB) is here reported, to reach an autonomous with improved anti‐tumor efficacy combining...

"1D cross-linked" thermoplastic elastomers could be an interesting class of materials, where the elastomer would physically cross-linked by self-association functional groups forming long supramolecular chains. These materials present both a high strength (due to very large functionality cross-linking domains) and reversibility at room temperature intrinsic chains). To obtain such poly(dimethylsiloxane)s (PDMS) grafted with hydrogen bonding bis-ureas have been synthesized modification...

Abstract Symmetrical N , N′ ‐disubstituted ureas have been synthesized and characterized. Among them, the branched dialkylureas prepared are highly soluble in organic media. Moreover, solutions obtained very viscous heptane, if alkyl groups not too bulky (i.e. a methyl group on α carbon, or an ethyl β carbon). Due to strong, bifurcated hydrogen bonds between urea moieties, linear supramolecular polymers formed. The degree of association these has determined by FTIR spectroscopy.

The toughness of a high-performance thermosetting epoxy network can be greatly improved by generating polyether sulfone−based macro- to nano-scale morphologies. Two polyethersulfones (PES) which only differ their chain-end nature have been successively investigated as potential tougheners high-Tg thermoset matrix based on mixture trifunctional and difunctional aromatic epoxies an diamine. For given PES content, morphologies the resulting matrices tuned changing curing conditions put into...

ABSTRACT Vinyl levulinate (VL) is used as a biobased reactive diluent in styrene (St)‐free unsaturated polyester resins (UPR). The reactivity ratios for the radical copolymerization of VL with diethyl fumarate (DEF) are determined by Jaacks method ( r = 0.01 and DEF 0.81 at 60 °C DMSO‐ d 6 ). properties UPRs having stoichiometric ratio between groups from UPR either St or compared. Defect‐free, slightly yellow, transparent, rigid thermosets obtained after mild curing cycle. Due to...

Supramolecular polymers are dynamic materials; consequently, their molar mass is concentration dependent. However, the present experimental results show that an efficient chain stopper (i.e., a monofunctional monomer) can be used to block dependence of hydrogen-bonded supramolecular polymer, over realistic range. This fact was derive molecular weight and radius gyration stopped chains (by light scattering) as well intrinsic viscosity. In second step, bis-urea-based polymer (EHUT) determined...

Supramolecular miktoarm stars (AB2 type) composed of poly (methyl methacrylate)-polystyrene2 (PMMA-PS2), poly(isoprene)-polystyrene2 (PI-PS2), and poly(vinyl acetate)-polystyrene2 (PVAc-PS2) were successfully synthesized by assembling reversible addition−fragmentation chain transfer (RAFT)-polymerized chains bearing hydrogen-bonding heterocomplementary associating units. To this end, thymine diaminopyridine-functionalized agents designed to efficiently mediate the polymerization vinyl...

Supramolecular poly(vinyl acetate) PVAc 3-arms stars were successfully generated by Reversible Addition-Fragmentation chain Transfer (RAFT)-polymerized chains bearing hydrogen-bonding heterocomplementary associating units. Chain Agents (CTA) thymine- and diaminopyridine-based units first synthesized proved to mediate efficiently the polymerization of VAc. The binding ability in solution was then demonstrated (1) H NMR GPC measurements, proving formation supramolecular stars.

Abstract High‐performance adhesives are of great interest in view industrial demand. We herein identify a straightforward synthetic strategy towards universal hydrogen‐bonded (H‐bonded) polymeric adhesives, using side‐chain barbiturate (Ba) and Hamilton wedge (HW) functionalized copolymer. Starting from rubbery copolymer containing thiolactone derivatives, Ba HW moieties tethered as pendant groups via an efficient one‐pot two‐step amine‐thiol‐bromo conjugation. Hetero‐complementary Ba/HW...

Two RAFT agents bearing respectively a Hamilton receptor (HR) and barbiturate (Ba) recognition units have been designed proven to selectively associate. Polymerizations mediated by these CTAs afforded high molar mass tailor-made H-bonding homopolymers block copolymers. The capacity of the resulting macromolecular building blocks form sextuple H-bonded complexes allowed for straightforward preparation original AB, ABC ABCD supramolecular copolymers with relatively binding constants (Kassoc ∼...

This work targets the construction of hydrogen-bonded (H-bonded) supramolecular polymeric micelles loaded with chemotherapy drugs (carmofur) and photothermal agents (IR780) for combined chemo-photothermal therapies (CT/PTT).

Abstract Nanostructuration of maleate and orthophthalic unsaturated polyester (UP) resins was achieved by the use high molecular weight amphiphilic PBA‐ b ‐P(MMA‐ co ‐DMA) 2 triblock copolymers. PBA is fully immiscible in cured UP resins, miscibility P(MMA‐ random copolymers can be ensured with a minimum DMA content 12 mol‐%. When using copolymers, transparent nanostructured thermosets are obtained outer blocks; value which higher than mol‐% depends on chemical structure. Finally, fracture...

A straightforward and efficient access towards the generation of well-defined giant vesicles (∼3 μm in diameters), featured by Hydrogen-bonded DAP–DAP dimerization, amphiphilic interactions is reported.

ABSTRACT This study focuses on the characterization of acrylic reactive mixtures designed for liquid composite molding (LCM) and yielding thermoplastic matrices applications. Conversion degree, complex viscosity, cure exothermicity are tracked during radical polymerization. Results show that these systems suffer from Trommsdorff's effect, is, polymerization is highly exothermic. The rheological also highlights a limit injectability LCM processes around conversion degree 10%. vitrification...